best solar yachts

Sustainability Success

10 SOLAR Boats 2023 & 2024 | Electric Yachts & Catamarans

With more steps being taken towards sustainable development, new, eco-friendly solar boats have been introduced in the world of green travel: solar electric catamarans. 

Solar boats are electric yachts that can go for long distances without needing to stop for fuel and without emissions. Those solar catamarans are interesting eco-friendly alternatives to the classic power boat or sailing yacht for cruising. However, there are also a few disadvantages that you should know about before purchasing one!

10 Solar boats, electric yachts & catamarans

Here are the best solar boats that will delight you with a top-notch sustainable yachting experience based on your requirements:

Sunreef Yachts – Eco 80 Sail Catamaran

• Silent Yachts – Silent 80 3-Deck

HH Catamarans – HH44

Silent yachts – silent 60, sunreef 43m eco (140 ft).

• Silent 120 Explorer
• 100 Sunreef Power Eco

Azura Marine – Aquanima 40

Soel yachts – soel senses 48, serenity yachts – serenity 64 (hybrid).

Here’s a quick summary of the features of the best solar catamarans for green yachting in 2023-2024:

If you are an advocate of sustainable yachting or sustainable tourism and are looking to buy an eco-friendly boat that doesn’t rely on fossil fuels , then you would do well to consider getting a solar catamaran. In this article, I will go through the pros and cons of 10 of the best solar yachts and superyachts that you can buy in 2023 and 2024!

It is also important to note that while there are solar panels for sailboats that you can fit on older models, those new boats have been specifically designed to maximize the use of renewable energy.

Most Luxurious + Most innovative solar system

The Eco 80 Sail Catamaran is one of the electric solar boats provided by Sunreef Yachts.

It features a unique “solar skin” that covers all composite structures on the boat, including hull sides, boom, mast, bimini, and superstructure. This green tech makes it possible to place solar panels where it wouldn’t normally be possible (like the hull and any other smaller but useful surface) and provide enough solar energy from every angle.

The boat is 80-feet long (24.38 meters) and includes electric motors that push it smoothly over the water without causing any vibrations or noise.

Besides being solar powered boat, the Eco 80 Sail Catamaran can also be powered by wind and hydropower. It is designed with a sail on its structure, allowing it to tap into wind power and supplement the solar.

The solar powered sailboat generates enough green power not only to propel the boat and keep it moving but also to charge the essential electric water appliances and other water-sport toys.

So far, the Sunreef Yachts Eco solar sailboats have earned a good reputation for being eco-friendly and sustainable. Besides, this solar powered catamaran takes its commitment to the environment a notch higher by using recycled materials , natural fibers, and non-toxic paints to create their boats.

It is no wonder that Sunreef Yachts have been winning environmental awards for so many years. This solar sailboat is one of the most remarkable boats you can ever invest in and it clearly shows the latest advancements in technology .

Prices: about $8 million USD

Where to buy : Sunreef Yachts .

• Larger surface covered with solar panels, that are installed also along the hull, and in other unusual areas.
• The batteries are 30% lighter than normal
• Unlimited cruising range.
• It runs silently and does not cause pollution.
• It has also traditional sails, so it can cruise also when it is not sunny without relying on batteries.
• Luxury, superb quality and finishing
• Great helm position.
• The solar catamaran is very costly (going for $8 million USD or more).
• The solar panels installed on the sides of the catamaran may not be appealing to the eye of all people.

Silent Yachts – Silent 80 Tri-Deck Solar Catamaran

Best pure electric

The Silent 80 Tri-Deck Solar yacht is popular for the large amount of space it offers.

This solar catamaran by Silent Yachts features three large decks that can be easily customized to fit the owner’s preferences and needs. The topmost deck can either be open or enclosed.

This solar powered yacht offers 4 to 6 cabins that are customizable, regardless of whether the deck remains open or enclosed. Besides, the top deck provides additional living space and can be used as a luxury master suite that opens onto a private space outdoors.

Where to buy : Silent Yachts .

• Purely electric propulsion that can be helped by the kite sail.
• The finishing, while being of high standards, doesn’t seem to be at the level of other options in its category.
• Quite costly, with prices starting at about $6 million USD.
• If going for a long cruise during cloudy days you may need to run the generator to keep going.
• The kite sail helps to give some propulsion using wind, but it is less effective than traditional sails.
• The absence of a traditional sail may make the boat a bit less stable, compromising a bit of the comfort while cruising.

Best for world cruising

HH Catamarans is a small boutique boat builder designing some of the most impressive solar boats for cruising, with one of their latest creations being the HH44.

The HH44 is a groundbreaking new boat that is designed to be eco-friendly and efficient.

The boat has a large battery bank that can be charged by solar panels, and also has two electric motors that can be used for electric propulsion up to 7 knots for up to 2h.

The HH44 has an innovative propulsion system named Eco-Drive. This is a parallel hybrid system that combines diesel and electric propulsion for long-range motoring and silent electric propulsion.

The boat also has two diesel engines, which can be used for long-range motoring or to generate electricity. The boat is also designed to be safe, with four propulsion devices plus sails and a large solar array.

The HH44 has a number of technical features that make it a groundbreaking eco-friendly design, including:

• 3 types of propulsion: full electric, standard diesel, and sail.
• 4.2 kWh of solar panels: generating power for recharging the lithium battery bank for solar .
• 10 kW electric motors (5kW each): mounted on the back end of each diesel engine for electric propulsion.
• The diesel engines can be used both for propulsion and as electric generators.
• Possibility to use the propellers to recharge the battery while the boat is sailing. Kind of like using hydropower to charge your solar batteries , pretty cool!

The HH44 is also a performance catamaran thanks to its C-shaped §daggerboards. Daggerboards are an essential component of many sailing vessels, providing both vertical lift and increased upwind sailing performance.

This solar powered yacht features up to 4 double cabins and 2 heads . Not bad for this world-cruising vessel!

If instead, you are looking for a larger boat, HH Catamarans also have other models up to 88ft.

This solar catamaran was also the preferred choice of Gone with the Wynns , a popular cruising YouTube channel. Here’s their announcement video:

Where to buy : HH Catamarans .

• A true performance world cruiser.
• Very resilient with 3 different propulsion modes (electric, sail, and conventional engines) and ideal for offshore cruising.
• It can run silently and without causing pollution.
• More affordable than other solar catamarans, starting from $1 mm USD
• Smaller than other options.
• The improved sailing performance requires narrower hulls, which reduces the available space onboard compared to other traditional vessels of similar size

Best mid-range

The Silent 60 is one of the smaller electric boats made by Silent Yachts. It is designed to be handled by at least two people. The users can either choose to include an additional crew or not.

Despite its outward small appearance, Silent 60 is very spacious and can accommodate a good number of people.

Besides, the electric yacht has a beautiful design that adds to its elegant and luxurious feel. It is usually designed with up to 6 cabins , with each cabin offering every basic amenity you need to have a luxurious stay on the yacht. In fact, the electric solar boat is equipped with everything you need to allow you to live on board permanently!

As someone who loves spending time on the water, I was really excited to learn about the Sunreef 43M Eco: a superyacht that is both eco-friendly and luxurious.

I was especially impressed by the solar power system, which is built into the composite structures of the yacht, and the large hydraulic platform which creates a vast walkaround beach club.

The interior of the solar superyacht is just as impressive as the exterior, with a variety of sustainably-sourced materials and fabrics used throughout as well as energy-saving air-conditioning. The Sunreef 43M Eco can welcome up to 12 guests in the most luxurious conditions.

Silent Yachts – Silent 120 Explorer

Here’s another incredible solar super-yacht by Silent Yachts. The Silent 120 Explorer is a truly unique yacht, designed to explore the world in style and comfort.

Powered by solar energy, this solar catamaran is perfect for those who want to enjoy the beauty of the open seas without worrying about the impact on the environment.

With plenty of space for guests and all the amenities you need onboard, the Silent 120 Explorer is the perfect choice for your next adventure. If you’re looking for a yacht that combines luxury and environmental responsibility, the Silent 120 Explorer is a perfect choice.

The company didn’t yet release detailed information, however, this superyacht seems to be even featuring a helipad under the roof’s solar panels!

The Silent 120 Explorer has plenty of room for guests and all the amenities you need onboard. So if you’re ready to embark on your next great adventure, be sure to consider the Silent 120 Explorer, which will likely start being delivered in 2023.

The 100 Sunreef Power Eco

Sunreef recently launched and sold their first 100 Sunreef Power Eco catamaran, a transatlantic luxury craft that takes solar boat design to the next level.

With massive living space, great autonomy, and impressive features like a flybridge that can be transformed into an outdoor cinema, the 100 Sunreef Power Eco is the perfect vessel for cruising in supreme luxury

This catamaran uses the latest innovations in solar power to achieve outstanding energy efficiency, and its ultralight battery bank provides for silent cruising and infinite range.

The fully customizable interior and exterior make this catamaran a truly one-of-a-kind option, and its use of ethically-sourced and eco-responsible materials is sure to please even the most discerning buyer.

If you’re looking for an electric yacht that is both luxurious and eco-friendly, the 100 Sunreef Power Eco is certainly a great option for you if you can afford it!

The most affordable $

The Aquanima 40 catamaran is entirely powered by solar energy. It features creative adaptations and unique innovations that make it eco-friendlier and more economical boat than other solar-powered catamarans. For example, the solar panels installed on the electric catamaran are built in such a way that they can sell any excess solar energy back to shore stations when connected.

The exterior of the Aquanima 40 has an elegant design. Also, the interior is not only aesthetically pleasing, but also very clean and modern.

The boat is designed with 2 single cabins for the crew and 2 double cabins for guests.

Indeed, this solar boat by Azura Marine is one of the most economical and cost-effective options you can go for when buying a solar catamaran.

• Relatively fast.
• Ideal for short vacations.
• The most affordable solar catamaran, starting at about $0.6 million USD.
• Much smaller than other options.
• Not recommended for long cruises.
• Basic looks and layout.

As its name suggests, the Soel Senses 48 is 48 feet long. It has a slender design and is lightweight , making it more economical than most other solar-powered boats.

The boat is designed with two sleeping berths that can accommodate two people each. It also includes a salon that can offer enough sleeping space for four people. 

Compared with most other solar yachts, the Soel Senses 48 has a much smaller size. Its size, adding to its sleek and innovative design, give it faster speed than other solar-powered boats.

It incorporates 12 solar panels installed on the roof ; all these panels generate a combined electrical power of up to 2.7 kWh. The electricity generated by the solar panels is then stored in two batteries which can be easily configured to hold a maximum solar power of 142 kWh.

Like other Soel Yachts, the Soel Senses 48 glides smoothly over water without causing any noise, rattles, or generating fumes.

It has average cruising speeds of 10 knots, even reaching top speeds of up to 18 knots. However, the solar catamaran cannot run at its top speed for long periods.

Both the interior and the exterior of the Soel Senses 48 have a sleek and modern design. Every single component of the solar catamaran has been designed carefully to make it as functional and comfortable as possible. Therefore, when you board on this boat, you can expect to experience one of the best sailing experiences of your life.

The Serenity 64 Yacht features a diesel engine. It is a hybrid solar boat, which means that it can run on either solar power or on diesel.

The diesel engine especially comes in handy when the users wish to achieve faster cruising.

The solar catamaran is a very spacious electric boat and provides plenty of living space. It is built with four luxurious cabins, with each cabin having its ensuite bathroom. And even though the Serenity 64 is smaller than the Serenity 74 model also built by Serenity, it still provided an elegant feel and a smooth sailing experience.

Solar Boats Pros and Cons

The sun is a powerful and free source of energy, making solar power an attractive option for those looking to power their yacht. Solar panels can be used to generate electricity to run the yacht’s lights, appliances, and even the engine. Solar power can also be used to heat water for showers and laundry. But, what are the pros and cons of solar catamarans?

Here’s a quick summary of the solar yachts’ advantages and disadvantages:

One of the main benefits of solar power is that it is renewable and environmentally friendly. Solar panels have no emissions and do not produce pollution. In principle, they also do not require fuel, making them very cost-effective in the long run. Solar power is also very reliable, as the sun is a constant source of energy.

There are a few disadvantages to solar power. Solar panels can be expensive to install, and while they require less maintenance, this can be quite costly, especially when it will come time to replace the batteries. Solar panels also need to be pointing directly at the sun to be effective, so they may not generate power on cloudy days or at night.

But there’s more, let’s see what some sailing experts are thinking about solar catamarans!

Sailing expert’s solar Boat review

Recently, one of the most popular sailing YouTube channels, Saliling La Vagabonde , published a very honest and interesting review of the solar powered yacht Silent 55. Here’s a summary of their experience:

• 7 Days onboard (6 nights)
• Travelled 145nm with an average speed of 7 knots
• Generator used for about 12h (in total)
• Fuel consumed: 208 liters

Here are some interesting observations they made:

• While cruising it may feel less stable than a standard sailing boat because it doesn’t have a sail to stabilize it when hitting the waves.
• For the Silent 55 it was possible to move at about 3 knots by using only the power generated by the solar panels (without using the batteries) on a sunny day. This means that if you are moving the solar yacht around quite frequently, you will end up using the generator quite a lot to produce the necessary power.
• When the batteries are out of power, the Silent yacht is using a (diesel) generator to supply the necessary power to keep the boat moving and to power the appliances.
• A great luxury yacht with all the comforts and going in the right direction for the future of the sector.
• Overall, the Silent Yacht is a great eco-friendly alternative to a power boat , while if you are thinking about cruising around the world, you would be probably better off going for a standard sailboat (or for some of the hybrid alternatives mentioned in this article, like the HH44).

Why are solar yachts all catamarans?

Solar yachts are all catamarans for 2 main reasons:

• Catamarans have a larger surface, which allows for placing more solar panels and also offers more room for the batteries onboard.
• Catamarans have efficient hulls for their size. This reduces their power consumption while moving.

This makes catamarans the ideal platform to build a solar-powered boat.

Modern solar electric boats are undoubtedly an eco-friendly choice in sea travel and a form of green tourism . Not only do these electric boats provide a smooth sailing experience, but they also reduce the release of emissions into the atmosphere, reducing the environmental impact and enhancing sustainability .

Luckily, given their size, solar catamarans can charge themselves (unlike electric cars ), so they can sail indefinitely without the need to stop for refueling.

If you are environmentally conscious and looking to get a boat that is more viable, desirable, and eco-friendly, you may consider investing in one of the solar yachts discussed in this article!

• Yachting World
• Digital Edition

Review: Silent 55, the extraordinary solar powered yacht

• January 18, 2019

Silent Yachts is tapping into the solar zeitgeist and creating a new meaning for the term ‘powercat’.  Sam Fortescue reports

There is a slow, silent revolution under way in the yachting world. It is a revolution that is introducing tonnes of lithium and a sprinkling of silicon to the spec list of new boats. Holding out the promise of silent mobility, plus limitless domestic power on board, it made a big splash at the last Cannes Festival of Yachting – not least thanks to the new Silent 55 catamaran which debuted there.

From the pontoon side, the Silent 55 looks like a typical modern catamaran, with a big coachroof studded with windows and a flybridge helm. Except there’s no mast. Now, bear with me here. I realise that this is a sailing magazine, but we will shortly get back to more familiar territory. The unique qualities of this catamaran only become apparent from up top, where an expanse of solar panels stretches away fore and aft, embedded into the coachroof. The hard top itself carries yet more panels, and can be folded down flush to give an unshaded solar array of 49m2. During the heat of a summer day in the Med, this is capable of generating 10kW of power and up to around 60kWh in the course of the day.

But to make a solar system work in reality, Köhler had to go back to the drawing board on yacht design. The saloon and hulls have extra thermal insulation to keep air-con losses down, and the use of carbon and aramid in key areas helps reduce the overall weight to a decent 17 tonnes (a Lagoon 52 weighs 22.5 tonnes). He has tried to keep windows out of the direct sun with long overhangs and in contrast to the Lagoon’s 12 deck hatches, the Silent 55 has just two.

Holistic design

On the other hand, it has lots of opening windows, to allow a natural draught to do its job. “It’s a holistic approach – you can’t take the batteries and the drivetrain and drop it into another boat.”

Of course, using the propulsion system quickly takes its toll of the boat’s 140kW battery bank. The model on display at Cannes had two 135kW motors, giving you just half an hour of silent motoring flat-out, albeit at a top speed of over 20 knots. More reasonable 30kW engines and a single-digit speed give you greater range. Nonetheless, the electric drive alone isn’t going to allow you to outrun a storm, or race home after a day at anchor, so the boat is designed to work with a generator hidden in the heavily insulated transom of its starboard hull. At cruising speed of around 5-6 knots, Köhler says there is rarely any need to use the generator, citing an owner who has just emailed him triumphantly about a second year totally generator-free. “In the end, you have to compare it to the performance of a sailing boat,” Köhler says. “It is as fast as a sailing boat in similar conditions – after all, there is no wind without sun.” He went so far as to tell me during the sea trial in Palma, Mallorca, that he believed the majority of sailors would happily dispense with the hassle of sails and a rig if only they could enjoy silent motoring and anchoring. “As soon as people realise the incredible concept of this boat, they won’t understand why they ever did anything else.”

The market does not seem to agree with him – yet. Sales of the boat have been good – they have already sold six, five of which are already in the water. But of those, four customers have taken the sail option, which means planting a 19.7m tall mast complete with boom and rigging slap bang in the middle of the coachroof solar array. “I was a bit amazed,” Köhler admits. “The shade from the rig reduces the energy generated by the solar area, while it costs more and is heavier, so consumes more fuel. Maybe it is for optical reasons.” In fact, the shade of the rig slashes the average yield of the solar panels in half. In the Med, that means around 30kWh per day. But perhaps it figures. The typical profile of buyers is an environmentalist who has a Tesla electric car and is “an early adopter who likes to have things before others”. And at low speeds, with modest use of the air-con, the reduced energy generation should still cover daily consumption.

The performance under sail should be reasonable because of the lightweight build of the boat, its broad 8.47m beam and stub keels added to each hull. Control lines are led back via conduits in the coachroof to the flybridge helm station, to make single-handing under sail a possibility.

More interesting, I think, is a sort of halfway-house option using a kite rig. This optimises the performance of the solar panels and gives plenty of propulsion. On the smaller 55 and the 64, Silent Yachts currently recommends a 19m2 kite that costs around €25,000 – a fraction of the cost of a new mast, boom, shrouds and sails. “The sail automatically makes a figure of eight above the boat, and you can steer it with a joystick or an app on an android phone,” Köhler explains. “It can propel the 55 at up to 6 knots, even in light winds.” Perfect for an Atlantic crossing, then.

For the bigger Silent 79, which will hit the water in the summer, a commercial grade Sky Sail system needs to be used – a smaller version of the ones used on cargo ships. This kite can propel the boat at ten knots, but it costs more than ten times as much as its smaller cousin. Both are capable of pulling the boat upwind. So far, so new. But outside the novel energy and propulsion system, the Silent 55 aims to do what many other cruising catamarans are trying to achieve. “Most of our clients order for circumnavigation and long-term cruising,” Köhler says. So the boat is aimed to be as comfortable and capable as possible with watermakers, TVs and an induction hob that all capitalise on the boat’s abundant energy. A flexible configuration allows owners the choice 
of between three and six cabins – the latter designed for charter. The owner’s cabin lies forward of the saloon, under the windows of the coachroof, which provide magnificent views and abundant natural light. There’s a walk-around bed and steps down into the starboard hull give access to an en-suite shower room and heads.

In my view, the best cabin lies aft of this, accessed in the traditional manner down steps out of the saloon. The king-sized bed lies athwartships and the shower is larger than that of the master cabin. There’s more space down here, better headroom and still plenty of light courtesy of the many hull lights.

When I had the chance to sea trial the Silent 55, albeit in motorboat format, I jumped at it. It was a contrary autumn day on Mallorca with 15 knots breeze – just a shame, then, that this wasn’t one of the sailing configured versions.

To start with, getting on board is made really easy courtesy of deep boarding platforms on the skirts. She feels rather square because of that vast, glazed saloon with its deep overhang, and perhaps because of the utilitarian nature of the hard top, which is really about supporting more solar panels. Nevertheless, the side decks are broad and uncluttered. The space up top is designed to concertina down flat, hence the hydraulic rams, fold-down seat back and lowering console. It makes a great sailing position, though, with all round visibility, and is also perfect for sundowners at anchor. When the rain comes down, this feels quite exposed, but there is a fully sheltered helm at the front of the saloon, and it is also possible to drive the boat from anywhere using a tablet thanks to smart electronics. Under power, the handling is superb. The quietness of the motors is astonishing, and I gather they’ll be inaudible on the next boat, which will do away with the gearbox. Even in the aft cabins, directly above the motors, there is no more than a distant hum. The boat responds instantly to the power and the wind seemed to have no impact at all. As with any propulsion system, the power consumption jumps as you pile on the speed – it was sobering to see. At 6 knots, both motors drew 10kW but at 8 knots it was closer to 30kW. I liked the huge saloon with its raised table for 360º views. And the sliding door and window gives great access aft, connecting the saloon and cockpit in fine conditions. The finish was smart and in muted tones, feeling more Scandinavian than German.

Intriguingly, at least it seems to me, Köhler has tapped into something with the concept behind Silent Yachts – but not entirely for the reasons that he expected. Buyers are opting for the sail or kite versions of the boat because they want a comfortable wind-powered craft with abundant, quiet energy on tap. It brings a whole new meaning to the 
term ‘powercat’

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The Best Solar Powered Catamarans (2023 UPDATE)

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Catamarans are incredible boats, and making one solar-powered really makes my little engineering brain go wild. In this article, I discuss some of the coolest solar-powered catamarans out there!

Here are three of the best solar-powered catamarans:

• Sunreef’s 80 Sunreef Power Eco Yacht
• Silent Yachts’ Silent 80
• Soel’s Senses 48

There are soo many variables that it’s tough to say one is better than the others. No matter which you board, you’re going to have a luxury experience. The benefit of these solar cats is that the experience can be had while maintaining a sustainable lifestyle and contributing to the betterment of the environment.

The diesel engine is dead, Long live electric power. Sort of…

Table of Contents

Solar Catamarans: Luxury Yachts

Before we look at each of these, let’s take a few paragraphs to talk about catamarans in general. First of all, when many people think of cats, they think of a relatively small craft barrelling across the water, one of its hulls in the air with a swashbuckling daredevil hanging off the side of it high above the water.

That’s not the kind of catamaran we’re talking about here. We are, instead, looking at yachts or cruising catamarans. These share one commonality with the other type of cat, and that’s the twin hulls. But that’s it. Cruising cats are slower, more stately boats. Also, on one of those little, quick ones, there’s not room for much of anything, and you won’t likely be doing any cooking or sleeping on it.

We’re also looking solely at solar-powered catamarans here, and although they have much in common with their diesel-drinking brethren, there are some key differences, which we’ll also address.

Perhaps the main difference (and one of the most significant selling points for a solar-powered catamaran) is the noise level. Gabo

Anyone who’s been on any boat with a combustion engine (diesel or petrol) on board has had to deal with the noise and smell.

But the drone (or roar, depending on the engine’s size and location) can be far from relaxing, which is one of the main reasons to get on a boat, off the mainland, and out to sea. Even if you’re marlin fishing—not the most peaceful undertaking man has ever attempted—you’re still out on the water and hope for some peace and quiet.

Eliminating that engine noise is a pretty big deal.

How Solar Catamarans Work

The biggest key to the success of the solar-powered yacht is not the solar panels – although those are great, as they look terrific and are well integrated into the ships. But the unsung hero here is the battery system.

Solar energy companies continue to perfect their industry. By making their solar batteries denser and denser, they create batteries that can store more solar power for more extended periods in smaller spaces.

And that brings us to an aspect you probably haven’t thought of:

Solar-powered yachts have more interior room because the battery system takes up less space than a conventional engine would.

Space customarily used by an engine room gets freed up for other uses.

Since most solar catamarans are nearly infinitely customizable, it’s hard to say what you might use that extra space for, but it’s available because of the solar power system.

The yachts have solar cells in all sorts of places, most notably on the roofs of the boats, but some companies build them in over large swaths of the hull, so they look as much like a design choice as a power source.

3 Best Solar-Powered Catamarans

Let’s be honest—if you’re dropping more than a couple of million dollars on a boat, two things are likely true: you have a lot of money, and you like nice things. All of the yachts listed here are lovely things, so it’s going to be hard to go wrong. 

As a result (and since these aren’t exactly accessible for test drives), it’s difficult to say which one of these is actually the best ; ergo, this list is in no particular order. They’re all glorious specimens.

Incidentally, where the price is listed, that number is an extremely general estimate. As these vessels are all entirely customizable and each choice below is available in different lengths and configurations, the cost can vary wildly.

To better understand what is a good price of a solar-powered cat, they should be compared to performance cruising catamarans or larger catamarans for families .

80 Sunreef Power Eco Yacht

This may be the most remarkable boat you’ll see for a long time. Sunreef has been in the yacht-building business since the turn of the millennium, winning awards along the way, and in the last few years, the company began work on its Eco line.

While there are shorter (and one longer) versions of this ship, the 80-footer (24.38 m) is pretty iconic. It offers electric motors to push it over the water and to do so with little noise, vibrations, and zero smell of fuel or exhaust.

As mentioned earlier, this is the yacht with solar cells pretty much all over it. They dot the sides of the hull and add to the overall look of the ship. With these cells and the panels on the roof, this yacht carries 200 square meters (2152 sq ft) of solar cells generating up to 40kWp (that’s 40 kilowatts peak, meaning under the best conditions, like on a bright, sunny day). Sunreef makes cats that run under sail, as well.

• Unlimited cruising
• No emissions
• Silent running
• Solar panels on the sides of the boat may not appeal to everyone
• Price: $8 million USD and up (new)

Silent Yachts has several versions of each of its catamarans. This eighty-footer (24m) is available in a loft or a classic version, but you get large spaces and incredible luxury no matter what you choose. The bathrooms alone on these things are pretty enough to live in.

Like Sunreef, Silent Yachts offers various lengths of these yachts, but they refer to the 80 as their flagship, and with good reason. Also with good reason, this yacht has been called “the Tesla of the seas.”

Three power options exist, each allowing higher maximum speeds for longer periods on the water than the last, but all three offer cruising speeds of up to 8 knots.

Its rooftop solar panels generate 26kWp of power . While that’s a significant step down from the comparable Sunreef vessel, the company claims unlimited range. Theoretically, it makes sense—solar power is even easier to come by on the open sea than on land, and with an endless supply, you ought to be able to cruise forever (as long as the sun shines).

All that power gets stored in batteries, and when it’s time to use it, the boat does so silently through its electric motors, on which Silent Yachts gives a lifetime warranty. While that warranty wouldn’t give you much peace of mind if you were on the float hoping for rescue, once you got it back home, whatever the problem was would get fixed, and you’d be ready to go out again.

Like any electric motor propulsion system, the Silent 80’s requires almost zero maintenance. Compare that to the ongoing work you do on your big, loud, smelly diesel engine. Not having to change the oil alone seems worth the investment.

• Recommended maintenance schedule happens after the end of most yachts’ lifespans, meaning you may not ever have to do any maintenance at all on this one.
• Kite available for additional propulsion (up to ten times more efficient than a sail)
• Its five-and-a-half-foot draft is pretty deep.
• Smaller kWp capacity than comparable makes.
• Price: $4.6 million and up (new).

Soel Senses 48

This is a smaller yacht (a little more than half the size) than the first two. However, Soel has built a beautiful boat that is entirely sustainably powered. The 12 solar panels on the roof generate 2.7 kWp of electricity stored in two batteries that can be configured to hold up to 142 kWh of stored solar power.

This, like the others, makes for a boat that glides over the water without rattles, without fumes, without noise. Unlike the others, its cruising speed tops out at 10 knots —faster due to its smaller size. Its top speed runs at 18 knots, but with significantly less kWp on board, the ship won’t run at that top speed for extended periods.

The company lists the ship’s range at between 30 and 56 nautical miles (55 – 103 km) , and the fluctuation will come from various options and choices available in operational modes.

• The boat’s 2.3-foot (70.10 cm) draft is shallower than the larger boats here.
• Orders of magnitude more affordable.
• This is a smaller boat and won’t comfortably sleep much more than 10.
• Limited range means this is a weekend cruiser, not a circumnavigator.
• Price: $600,000 and up (new).

Other Choices

These next couple of catamarans are newer and smaller, but they bear mentioning for various reasons, which we’ll be sure to point out with each one. Again, at a certain point, a yacht is a yacht, and if you can fit your friends and family on it for a fun trip, everything else is just gravy.

Smaller than Silent Yacht’s Silent 80, this one is a product not only of Silent Yacht but one made in conjunction with Volkwagen and Cupra, a Spanish car company.

Volkswagen has become a significant player in the electric motor game, so the company brings its Modular Electric Drive (MED) to this vessel, allowing for an even more efficient electric propulsion system than the one on the Silent 80. 

Cupra’s presence in the project seems to be solely on the design side of things. The Silent 50 is a vessel built with an eye toward a world in which water travel creates zero greenhouse gas emissions.

Aquanima 40

Azura Marine , based in Singapore, recently announced a solar-powered yacht whose biggest feature may have been its six-figure cost. According to Azura Marine, the ship can cruise indefinitely with a 10 kW solar power system and a 60 kWh battery pack. That is a smaller battery pack than the others, but it’s also a smaller craft.

This cat is a terrific combination of price and features.

Choosing the Best Solar Catamaran for You

This will be a personal choice and one you’ll want to do a lot of research on (which is presumably why you landed on this page in the first place). Since solar-powered catamarans sell for sums of money with at least seven digits in them, this will not be an impulse purchase for very many people.

Any of the choices listed here will be well-built, beautiful, luxurious places to lay your head or sip your mimosas while you’re on the water. It may come down to aesthetics, range, or speed, but all of these models offer incredible specimens that everyone—landlubber or old salt—will treasure.

The luxury yacht world is an exclusive one, but it doesn’t have to be wasteful or ecologically irresponsible. The yachts listed here are some of the best in the world in terms of combining luxury with solar power and providing emissions-free yachting that’s quiet and relaxing.

New yachts can be purchased from the manufacturers, allowing for customization, and various online yacht brokers are willing to help you find a pre-owned craft that’s right for you.

Finding the right yacht for you will depend on your wants and needs, but we can all agree that environmentally sound, sustainable power on these vessels is valuable.

• Electrek: This $500,000 electric yacht can cross oceans on just battery and solar power
• Forbes: Volkswagen Unveils 50-Foot Solar-Powered Catamaran In Partnership With Silent-Yachts
• Kite Boat Systems: Kite controller for sailing boats
• Plugboats: New 48′ solar electric catamaran from Soel Yachts
• Robb Report: Solar-Powered Yachts Are Taking Over. Here’s Why That’s a Good Thing.
• Silent Yachts: Silent 80
• Soel: Soel Senses 48
• Sunreef: 80 Sunreef Power Eco

Owner of CatamaranFreedom.com. A minimalist that has lived in a caravan in Sweden, 35ft Monohull in the Bahamas, and right now in his self-built Van. He just started the next adventure, to circumnavigate the world on a Catamaran!

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Five of the Best Solar Powered Yachts of 2023

• Thursday 10 December, 2020

Silent Yachts founder Michael Köhler drew plenty of laughter across the industry back in 2005 when he announced he was moving away from diesel to build solar-powered luxury marine vessels. When his Köhler’s Solarwave 46 was launched five years later, though, those laughs turned to gasps.

Despite the limitations and expense surrounding the technology back then, he had achieved a stylish creation that had all of the mod cons and ran purely on the power of the sun. It should come as no shock then that Silent Yachts leads off our list of the top five solar-powered yachts on the market today.

Solar powered yachts are becoming increasingly popular in Australia, with more and more people looking for eco-friendly and sustainable ways to explore the country’s stunning coastline. These vessels harness the sun’s power to provide a clean and renewable energy source, reducing the need for fossil fuels and helping to protect the environment. With so many options on the market, it can be difficult to know which yacht is the best for you. To help you make an informed decision, here are five of the best solar powered yachts for sale in 2023.

Exploring solar-powered boats for sale

• Silent 80 Tri-Deck catamarans  

• Silent Yachts Catamaran Silent 55  

The solar-powered Catamaran Silent 55 combines eco-friendly propulsion with luxurious accommodations. It is a 55-foot ocean-going catamaran with four staterooms and restrooms that is solar-powered and self-sufficient. The only mechanical components that need maintenance are the generators; there are no engine noises or vibrations.

The most powerful E-Power+ propulsion option, which combines the largest battery bank with the strongest electric motors, is available on this fully equipped vessel. As a result, faster speeds can be maintained for much longer while optimising the amount of energy stored for backup and used when necessary. E-Power+ provides the best solar-powered yachting experience.

• Serenity Yachts Serenity 64

The Serenity Yachts range is focused on power and can run indefinitely on its array at a cruising speed of between four and six knots while it has top speeds of up to 16 knots. It has electric and hybrid motors that also power all of the amenities and the 64-foot vessel is available in several different layouts.

• Serenity Yachts Serenity 74

• Soel Senses 48

Updated February 2023

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Silent Yachts

Creators of the world’s first series produced, solar-powered electric yachts.

Unlimited Range

Noiseless cruising, zero emission, minimal maintenance, pioneering solar powered yachting since 2009.

The Original Solar Yacht

As the original inventors of series produced solar-electric yachts, we pioneered this innovative approach. Our first model, the Silent 64, was launched to the market in 2016, several years before any other shipyard considered the possibility of going electric.

Leading Technology

Our founders began to research alternative energy sources to power yachts during the mid 1990s. Today, the technology of our in-house developed solar-electric drivetrain has been perfected and is multiple generations ahead in terms of reliability, performance and efficiency.

Historical Track-Record

In 2009, the Solarwave 46 was launched as our first prototype of a fully solar-electric, self-sufficient ocean-going catamaran. Since then, our electric yachts have cruised many 10.000s of nautical miles, performing flawlessly during a variety of weather conditions.

Enabling Self-Sufficiency

What differentiates a Silent is the unprecedented level of autonomy provided by our yachts. Being able to produce your own energy enables a fully self-sufficient lifestyle on board. Travel the oceans sustainably while making them your infinite playground.

The award-winning entry to solar-electric yachts.

Timeless design meets state-of-the-art technology.

120 Explorer

The boldest expression of solar powered yachting yet.

What Makes Us Unique

The tranquility on board of our yachts is unique. A lack of noise, fumes and vibrations create a deep connection with the sea. Luxury and sustainability finally merged into a holistic experience, working hand in hand with nature by minimizing the impact on the marine environment without compromising comfort.

For optimal performance and efficiency, our solar-electric drivetrain integrates seamlessly with all onboard systems. Compared to fossil fuelled powertrains of motoryachts, electric powertrains have very few moving parts, resulting in minimal maintenance, maximum reliability and significantly lower running costs.

The ability to recharge your own batteries with the sun marks a new era of freedom. Depending on cruising speeds and weather conditions, a Silent has virtually unlimited range, enabling you to live a fully self-sufficient lifestyle on board. Unbound by the limitations of fossil fuels, you are free to explore the horizons.

The technology powering our yachts today has been pioneered by our founders almost three decades ago. Continuous upgrading and steady optimization of the entire system are some of the key reasons our in-house developed solar-electric drivetrain offers a comprehensive portfolio of assurances and warranties.

Why Silent Yachts

A sensible approach to yachting which works in self-sufficient harmony with nature and creates a completely new experience on board.

Tech Corner

Why a Solar Powered Yacht?

Let’s break down the advantages of harnessing the sun’s energy for yacht propulsion: solar power offers remarkable efficiency, significant environmental benefits, and an unmatched synergy with the yachting experience. Join us as we dive into the future of sustainable yachting and discover how solar-powered yachts are revolutionizing the seas.

Living on a Silent 62 Solar Electric yacht

Silent Yachts’ range is designed to harness the power of the sun, providing green energy and silent cruising. But what can owners truly expect? How much power does the Silent 62 use while cruising? In this article, we evaluate a typical day onboard the Silent 62, based on actual data from our yachts.

Silent Yachts’ shining debut at the Venice Boat Show 2024

Silent-Yachts emerges stronger under new ownership

New Silent Drivetrain

Tech shorts 2023

Electric power event on the water

Shipyard tour Italy by Michael & Heike

“The Tesla of the seas! An amazing founding couple, a highly innovative product as well as a really cool story behind it. Furthermore, a lot of love and attention has been invested into every single detail – truly impressive!” Frank Thelen / TV Personality, Founder, Angel Investor & Disruption Expert

While the present has brought us the dawn of smart cars, I strongly believe the future will bring us solar powered smart boats – and I definitely want to be at the frontline of that journey. Michael Jost / Former Head of Group Strategy of Volkswagen Group

The idea of sailing while charging your own battery is super powerful to me – solar powered sailing is the perfect love story! Jochen Rudat / Former Tesla Central Europa Director, Advisory Board Silent Group

Elon Musk single handedly forced an entire industry to go electric, as a matter of fact if they don’t all go electric now they will soon die. I would like to see the same thing happening for boating. You are not just selling boats – you are the actual leading edge of a crucial and much overdue revolution to sustainable transport!” Klaus Obermeyer / Emmy Award Winner

I am completely excited about solar catamarans. I knew before they are great but now I truly believe this is the future. After so many boats I’ve seen in over 18 years with Boote Exclusiv, this yacht truly blew my mind. Such a silent and peaceful cruising experience – just the way it should be. Martin Hager / Editor in Chief for Boote Exclusiv - Yachts

How Do Solar-Powered Boats Work? 7 Innovative Vessels That Run on Solar

Solar boats can serve ordinary functions for more sustainable transportation.

David Kuchta, Ph.D. has 10 years of experience in gardening and has read widely in environmental history and the energy transition. An environmental activist since the 1970s, he is also a historian, author, gardener, and educator. 

• Wesleyan University, University of California, Berkeley

• University of Tennessee

Finnbarr Webster / Getty Images

• Renewable Energy
• Fossil Fuels

When Greta Thunberg crossed the Atlantic in 2019 to address the 2019 UN Climate Action Summit, she sailed aboard the Malizia II , a racing yacht powered by hydro, solar, and sail. The Malizia II raised the international profile of powering boats with renewable, carbon-free energy.

Installing solar panels on the Malizia II and other boats is a challenge. The panels and electronic equipment can be exposed to corrosive saltwater, strong winds, and extreme weather conditions. The panels must conform to the shape of the vessel, but cannot interfere with the work of the crew. Fortunately, these are challenges that many boat owners have overcome. In a growing industry, flexible solar panels capable of being installed on a boat can cost as low as $200 . Solar power isn't just for high-end racing yachts.

One of the virtues of a solar-powered boat is its infinite range when paired with lithium-ion batteries on board, which can store the energy produced by the solar panels. Like a sailboat, a solar-powered boat never needs to make refueling stops.

Spurred on by competitions like the Solar Splash (which calls itself “the World Championship of Collegiate Solar Boating”), the Solar Boat Regatta , the Dutch Solar Challenge , and Solar Sport One , engineers and innovators in sustainable transportation have turned solar-powered boats from a novelty item on the sea to vessels that can serve many functions.

The Malizia II

Mark Lloyd/Alea / Getty Images

The Malizia II is a 60-foot (18-meter) monohull boat weighing 8 tonnes. It was launched in Monaco in 2015. While it has participated in a number of races and regattas, it is best known for transporting Greta Thunberg to the United Nations Climate Action Summit in 2019. But it was built for racing—capable of speeds of up to 25 knots, it is one of the fastest boats of its class.

The Solliner

The Solliner is a line of small catamarans meant for day boating, from Green Dream Boats . At 21 feet (6.2 m), it can accommodate up to 10 people in a U-shaped seating area. They are fitted with four solar panels that allow for navigation without the need for an outside energy source. They can sail at up to 12 km/hr. Solliner boats have been seen around the world, such as the one pictured here in Poland. In the United States, they are sold by Infinity Solar Boats.

Samarjitbharat / Wikimedia Commons / CC BY-SA 4.0

The Aditya is India's largest solar boat and the world's first solar-powered ferry. Carrying approximately 1,700 passengers per day , it is 30 times cheaper to run than the diesel ferry it replaced. In 2020, it won the Gustave Trouve Award for Excellence in Electric Boats and Boating, an international award. The Indian state of Kerala, which commissioned the Aditya , plans on replacing the entirety of its diesel fleet with solar ferries. The Aditya is a 20-meter-long catamaran ferry boat made from glass-reinforced plastic with photovoltaic panels on its roof. It seats 75 passengers at a time.

The Interceptor

The Interceptor sounds like a racing boat, but it is a 24-meter (78 ft) solar-powered barge whose role is to intercept 50 tons of trash a day from Malaysia's rivers—most of it plastic that would otherwise reach the sea. The Malaysian Interceptor is one of a series of Interceptors created by The Ocean Cleanup , the largest effort to remove plastic waste from the oceans, 80% of which stems from 1,000 of the world's rivers. Other Interceptors are (or will be) stationed in Indonesia, the Dominican Republic, and Vietnam.

MS Tûranor PlanetSolar

Pascal Le Segretain / Getty Images

A 31-meter catamaran, the MS Tûranor PlanetSolar is the world's largest solar boat and the first to sail around the world. On its round-the-world voyage, it sailed at an average speed of 5 knots—not racing yacht speed, to be sure, but to be expected from a 6-meter-wide scientific research vessel weighing 89,000 kg (nearly 100 tons), 8.5 tons of which are lithium-ion batteries stored in the ship's two hulls. It was launched in 2010.

The 537 square meters of solar panels are sturdy enough to be walked on, and provide electricity stored in 6 blocks of lithium-ion batteries, allowing the Tûranor PlanetSolar to travel over 60,000 km (37,282 m) in 584 days without fuel stops.

The Ecowave

The Ecowave ( Ecowolna ) is Russia's first solar-powered catamaran. In 2018 it conducted a scientific expedition to explore the potential for solar-powered trams for the Neva, Oka, and Volga rivers. Launched from St. Petersburg, the Ecowave expedition covered more than 5,000 km (3,106 m) over 90 days, traveling the Black and Caspian Seas as well as major rivers of Russia. The catamaran is 11.6 metres long.

The solar panels cover an area of ​​solar panels is 57 square meters (613 sq ft) and are capable of producing 9 kW of power. Lithium-ion batteries allow the vessel to sail for 20 hours without recharging.

While apparently no longer plying the waters of the Lot river in France, the Kevin was a solar-powered hotel boat that offered river cruises focused on sustainable river tourism. Calling his converted barge “ the first solar boat-hotel of the world ,” owner Dominique Renouf launched Kevin in 2011. The vessel was 97 feet (29.50 m) long, equipped with a solar water heater, and able to accommodate 14 overnight passengers in 6 cabins.

4FR / Getty Images

Solar-powered boats can be as humble as tour boats on Turkey's Lake Eğirdir or on Lake Altaussee in the Austrian Alps. Like ferries, tour boats are ideal candidates for solar power, as their regular routes allow for batteries to be sized with enough electricity to power voyages of days when the sun isn't shining.

Solar boats have barely entered the mainstream boating market, but the technology is within the financial reach of most boat owners, as the cost of solar panels has dropped precipitously over the past decade. Any boat with a large-enough surface exposed to the sun can attach solar panels to it, and with a little wiring and (optionally) battery storage, infinite sailing is an increasingly affordable possibility.

" Largest Solar-Powered Boat Completes Around the World Voyage ." Guinness Book of World Records , 2012.

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• solar electric yachts
• Soel Senses 62
• Soel Senses 82
• Soel Shuttle 14
• Custom model

SOEL SENSES 62

Solar electric yacht.

Welcome the Soel Senses 62, a fully sustainable solar electric yacht for silent cruising with trans-ocean capabilities. State of the art technology is combined with modern design, to offer the highest comfort and pleasure on board, while providing an extremely sustainable way of cruising the oceans. With no noise distractions on board, the 62ft composite eco yacht turns into an oasis of tranquility for up to nine people and three crew.

TIMELESS DESIGN FOR A MODERN SOLAR ELECTRIC YACHT

Elegant lines flow into dynamic details, which present a fresh and inviting exterior and interior, characterized by simple and honest aesthetics. The solar electric yacht provides the right balance between minimalistic and modern yet timeless design with a warm and delicate style.

SPECIFICATIONS ELECTRIC YACHT

CUSTOMISATIONS

With the teams’ vast expertise in the fields of design, naval architecture and electric system integration, Soel Yachts can offer tailor made solutions and high level consultancy. Within the Soel Senses family, the client can choose the perfect matching layout to create a unique and very personal electric catamaran. A variety of possibilities are offered for the charter versions with crew cabin and galley down, while the private owners versions can be equipped with the galley up in the main salon and the master cabin down in the hulls. Soel Yachts also introduces an alternative option with an enclosed flybridge , for use as an owner’s cabin, office or gym. Likewise, Soel Yachts is flexible to work with the clients’ specific demands and wishes when it comes to the custom electric propulsion system and on board gear, as well as for tender and toys.

OPEN TRI-DECK WITH GALLEY UP OPTION

SS62 OPEN TRI-DECK

SS62 OPEN FLYBRIDGE

SS62 MAIN DECK

SS62 LOWER DECK

ENCLOSED TRI-DECK WITH GALLEY DOWN OPTION

SS62 ENCLOSED TRI-DECK

SS62 ENCLOSED FLYBRIDGE

Inside becomes outside

The core concept of the Soel Senses 62 has been the seamless integration of different spaces, openness and versatile usage of its features right from the beginning. While the front doors lead to a comfortable and lush front lounge area, in the back, large sliding glass doors open up the main saloon to the aft cockpit area for unique views and a no boundary connection of the interior with the exterior main deck of the solar electric yacht. This roomy solar powered yacht offers great comfort within the spacious owners cabin, two VIP guest cabins and kids cabin with three beds. The separate crew cabin with its own access assures both comfort and privacy.

DOWNLOAD SS62 BOOKLET

DOWNLOAD SS62 TECH SHEET

Electric match.

Central to crafting efficient zero-emissions vessels is right-sizing the propulsion system. The key advantage of Soel Yachts is that the propulsion system and the vessel are being designed together. An optimisation of the synergy between the two ensures reliability and quality for the high performance vessel, and raises the bar for future boats to come. Every project is being looked at from a naval architecture point of view, tailoring the propulsion system exactly to the clients’ desired operational profile.

PREMIUM COMFORT AT LOW COSTS

The very functional eco electric yacht gives its owner the ultimate freedom to go near and far at highest comfort while keeping the cost and emissions footprint at incredibly low levels. 42 state-of-the-art solar panels generate 18.5 kWp on the solar roof and let its user enjoy sustainable and luxurious yachting without any noise and high fuel bills.

PRECISION ENGINEERING

The efficient hull shape was specifically designed for efficient electric propulsion and cruise comfort. During the engineering process several CFD analyses were carried out and special devotion was given to the integration of the electric system in order to optimize the speed and range, as well as handling and maneuverability.

The solar electric yacht is perfectly matched to the system and the system is perfectly matched to the yacht, resulting in an optimized range and performance.

RESERVE YOURS NOW

Want to go the extra mile? We too! Through our in-house electric naval architecture, design and system integration, Soel Yachts offers a unique approach to making your electric yacht dream come true. Please leave your name and contact details below, so that we can get in touch with you for discussing your specific wishes, pricing and build-slot availability for the Soel Senses 62 solar electric yacht.

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The 7 Best Superyacht Catamarans, From Solar-Powered to Explorer Beasts

From a go-anywhere rig to a cat that carries an evtol and mini-submarine, here are our favorite twin-hulled marvels., chrissie mcclatchie, chrissie mcclatchie's most recent stories.

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• Share This Article

Are two hulls better than one? If the array of new build and new concept catamarans are anything to go by, it’s a question the yachting industry appears to increasingly be asking.

Celebrity endorsement in the shape of Rafael Nadal has certainly helped raise awareness of the category, but beyond the tennis ace’s custom Sunreef 80 Power , more and more yacht owners are coming to see that cats are worthy of their attention: The twin hull design delivers larger volumes, greater stability, as well as increased efficiency and speed when compared to its monohull equivalent.

Beyond leisure cruising in shallow, tropical waters, today’s class of catamarans are being primed for global expeditions. The category is also shining bright with early prototypes demonstrating how yachting is going green, such as the hydrogen-fuel-cell-powered power-cat tender by America’s Cup team Emirates Team New Zealand.

From classic models to rugged explorers and support vessels to a hydrogen-fuel-cell-powered cat, here are seven stellar twin-hulled vessels that show how versatile the power-catamaran design can be.

Astilleros Armon’s ‘Wayfinder’

The second big cat–following the stealth-like 217.2-foot Hodor–in the Incat Crowther ShadowCat series, Wayfinder launched from Spain’s Astilleros Armon in 2021 as a support vessel to a superyacht. It’s already been spotted in the Mediterranean, dutifully playing its supporting role to the mothership. At 223.8-feet long, and with a 45.9-foot beam, the shadow boat has extra storage space for the mothership, a games room and an outdoor area all rolled into one, with a collection of extra features including a helipad, helicopter hanger, spare parts workshop, medical facilities, a flower room and a pickleball court. There is also space for a main crew of 18, with extra space for 14 supplemental crew or service staff.

Silver Yachts’ ‘SpaceCat’

In October 2022, SpaceCat emerged from Silver Yachts in Fremantle, Western Australia, the first multihull delivery from the Australian yacht builder behind the naval-styled explorer yacht Bold. Like the yard’s monohulls, the superyacht bears the signature of yacht designer Espen Øino who has described the category as the “SUV” of the sea for its potential to first divide opinion and then perhaps dominate the market. A compact 118.1-foot length hides an impressive 4,306 square feet of space across the tri-deck configuration; the largest being the 2,174 square-foot main deck. The series has been designed with owners who may want to own more than one. “The yachts could be positioned on three main continents; one in Asia, one in the Mediterranean, and one in the Caribbean, avoiding any hassle of repositioning and non-availability to use the vessel,” said the shipyard said in a statement at SpaceCat’ s launch.  

Abeking & Rasmussen’s ‘Nurja’

When delivered in 2008, the 134.6-foot Silver Cloud stood out for its amphibian appearance and full-width helipad on the upper deck, but what attracted the most attention was her swath (small waterplane area twin-hulled) design, the first time such a concept had been seen in the superyacht fleet. The owner chose Abeking & Rasmussen for the build for a reason. He was impressed by the German yard’s proven success with the swath platform in its military and commercial builds. He believed the stability would offer an antidote to his wife’s seasickness, an assumption that was proven correct. In December 2020, the yacht changed hands and is now known as Nurja .

Sunreef’s 80 Eco

At last year’s Monaco Yacht Show, the largest yacht may have been Lürssen’s sleek 378-foot motoryacht Ahpo but, across the port, a catamaran less than a quarter of the size was turning just as many heads. With over 1,700 square feet of solar panels seamlessly integrated into her hull, superstructure, mast and bimini roof, the 80-foot Sunreef 80 Eco is a vision of the future, with fully electric propulsion for silent cruising. Along with smart innovations, including a rainwater collection system for washing down the deck and the ability to use her solar panels to heat up the boiler, there’s also plenty of proof that going green doesn’t mean compromising on luxury: The interiors are finished with sustainable materials, including natural fabrics and salvaged teak to reach the exacting standards of superyacht comfort.

Equipped with an electric-hybrid drive system, as well as both solar panels and hydr0-generation technology to top up battery power, the French-built Windelo 50 Adventure can reach both the wilds of Patagonia and the palm trees of the Pacific Islands at minimal cost to the environment. Scratch the surface of its classic catamaran aesthetic for more eco-friendly innovations like a hull constructed from a composite material of basalt and PET foam from recycled plastic bottles. These upcycled materials reduce carbon emissions by almost 50 percent compared to traditional materials. The interiors haven’t been ignored either: It’s a modern, functional design emphasizing sustainably sourced wood. The first of this series earned a special mention for sustainability at the European Yacht of the Year 2022 awards.

Profab Central Engineering’s ‘The Beast’

With its thick gray, geometric stripes that stand out against the endless blue of the South Pacific of its home waters, there’s nothing inconspicuous about The Beast . Delivered in 2019 by New Zealand’s Profab Central Engineering, the 128.7-foot vessel is billed as the ultimate adventure charter yacht, equipped with scuba diving equipment, wakeboards, SUPs, a waterbike and even a 42.7-foot sport fishing vessel called Baby Beast. The twin-hull design adds to its personality, says its charter manager, Ben Osborne from 37South in Auckland, New Zealand. “The extra volume allows The Beast to carry larger tenders and more equipment—setting it up perfectly for exploration—style cruising, while not sacrificing on the interior spaces,” he told Robb Report . The interior is styled like a Manhattan bachelor pad and can sleep 12 guests in five cabins.

Silent 120 Explorer

Proof that 007-style toys are no longer the sole domain of football pitch-sized yachts, the Silent 120 Explorer’s onboard stash includes a U-Boat Worx Nemo submarine and Xcraft eVTOL (electric vertical take-off and landing) aircraft. And, true to sustainable super-spy form, rooftop solar panels slide open to reveal a smartly concealed e-VTOL touch-and-go landing pad. A generous 45.4-foot beam—plus the space saved by its solar and electric propulsion systems—is what makes such cool cruising extras possible on a boat of this size. Another of the new wave of cats designed for carbon-free adventure cruising, this latest project builds on the Austrian company’s previous all-electric launches, such as the Silent 60. The first 120 Explorer is set to hit the water in 2024.

Read More On:

• Abeking & Rasmussen
• Silent Yachts

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The Best Solar Panels for Boats for Eco-Friendly Energy

Solar energy is the most abundant renewable energy source. Harnessing the sun's power is a reliable and eco-friendly way to power your boat and get where you want to go. It’s also a great backup energy source during an emergency. You can save money and reduce pollution—it's a win-win!

Solar panels are a great way to give your boat energy and power. The Renogy Solar Panels for Boats (our favorite) has panels that are compact, reliable, and built to last with corrosion-resistant aluminum frames and low-iron-tempered glass. Keep reading and learn which solar panel is right for your boat!

Our Top Picks For Solar Panels for Boats

• Best Overall: Renogy Solar Panels for Boats Shop Now ➔
• Largest Panels: Rophie Solar Panels for Boats Shop Now ➔
• Most Durable: TopSolar Solar Panels for Boats Shop Now ➔
• Most Lightweight: ECO-WORTHY Solar Panels for Boats Shop Now ➔
• Easiest Installation: Sunway Solar Panels for Boats Shop Now ➔
• Most Surface Area: EF ECOFLOW Solar Panels for Boats Shop Now ➔
• 1 What to Consider When Buying Solar Panels? 
• 4 Accessories 
• 5 How Do Solar Panels for Boats Work? 
• 6 Installation
• 7 What Are Care Requirements to Enhance the Life of Solar Panels for Boats? 
• 9 Cleaning 
• 10 What Are the Properties of Charge Controllers for Solar Panels for Boats? 
• 11 Basic charge controllers 
• 12 Mid-range charge controllers
• 13 Max power charge controllers 
• 14 Conclusion 

Can solar panels for boats run a trolling boat motor?

How long does it take for a solar panel to charge your boat’s battery, why do people consider installing solar panels for boats, related articles, the best solar panels for boats, best overall.

Renogy Solar Panels for Boats

The Renogy are 100W monocrystalline solar panels providing an average of 400-500Wh or 33-41Ah of electricity per day, so you have reliable performance. It has bypass diodes that protect the solar cells from overheating, so you don’t have to worry about maintenance. In addition, it features a corrosion-resistant aluminum train providing extended outdoor use without any extra damage.

These solar panels come with pre-drilled holes on the back so that you can install and mount them without spending money on professional help. They measure 42.2 x 19.6 x 1.38 inches and weigh 14.3 pounds, making them lightweight and convenient. Moreover, you can install them on boats, rooftops, cabins, and more for multifunctional use. Because of their efficiency and reliability, these solar panels stand at the top of our list.

• They are weather-resistant 
• These solar panels maintain cell temperature 
• Provide reliable performance
• Only compatible with Renogy ground mounts and brackets

Largest Panels

Rophie Solar Panels for Boats

The Rophie Solar Panels easily stands out on this list. Designed with impeccable efficiency, they accelerate solar charging to the next level, making it ideal for outdoor enthusiasts and off-grid boat owners. These solar panels convert sunlight into power rapidly, while their ultra-light, foldable design ensures convenience during transport and installation. Don’t let their light weight fool you, though, as they pack an impressive 200 watts, delivering unmatched power performance for your boat or outdoor camping.

These panels don’t just excel in efficiency and power; they’re also built to endure. Their IP67 waterproof grading ensures that they remain operational even under challenging weather conditions. Their high-quality MC-4 connectors further optimize power transfer while ensuring safe and secure connections. Plus, their compact design won’t take up much space, proving to be the optimal choice for boat owners who value both power and convenience.

• Lightweight and easily transportable
• Durable and water-resistant
• High-performance with 200W
• Can be a little pricey

Most Durable

TopSolar Solar Panels for Boats

The TopSolar Solar Panels are available in a kit containing 20W solar panels, a solar charger regulator of 12V/24V, two 6.5-foot cables with alligator clips, and an O-ring terminal to have a complete experience while on the go. They are perfect for off-grid 12-volt battery charging systems providing you with various DC applications like cabins, boats, battery-operated gates, and more. They come with a 10A solar charger controller preventing the battery from overcharging, discharging, and risk of short circuit for a safe experience. 

These solar panels have aluminum and tempered glass frames, ensuring a durable and weather-resistant use. Weighing 2.75 pounds and measuring 2.32 x 13.86 x 17.13 inches, they are compact and portable. 

• Easy to store and carry 
• They come in a complete kit 
• Provide excellent weather resistance
• Not suitable for large areas and machinery

Most Lightweight

ECO-WORTHY Solar Panels for Boats

The Eco-Worthy Solar Panels are 10W 12V solar car battery chargers that can be used to recharge boats, motorcycles, boats, snowmobiles, and tractors. They feature a cigarette plug option supplying you with constant power when needed. This kit includes a cigarette lighter adapter, one pair of battery clips, and four-piece PVC suckers ensuring maximum results in no time. 

They also have energy-saving, built-in blocking diodes that prevent reverse discharge from maintaining and extending battery life for maximum durability. It measures 1.4 x 9.6 x 15.3 inches and weighs only 1.5 pounds, so you have a compact product at hand

• They are available in a complete kit 
• These panels are lightweight and compact 
• They can recharge different types of vehicles
• Longer charging times

Easiest Installation

Sunway Solar Panels for Boats

The Sunway Solar Panels are battery charger panel mounts that require a simple installation on any windshield or dash, giving you a quick and convenient experience. They come with 12-volt batteries and a maintainer that protect your panels from overheating and discharging, ensuring safe and convenient use. In addition, these panels are equipped with ultra-clear PC glass, so you have a strong and durable product. 

They contain built-in blocking diodes that prevent reverse charging allowing your battery to maintain its useful life. Moreover, they also come with a blinking LED charge indicator that lets you know when the job is done.

• Comes with a battery maintainer
• Do not require professional installation 
• Comes with charging indicators
• Suitable to recharge small batteries only

Most Surface Area

EF ECOFLOW Solar Panels for Boats

The EF Ecoflow provides 160W foldable solar panels are designed to produce maximum power at any time of the day when paired with an EcoFlow power station, so you never run out of electricity. Moreover, they have a seamless one-piece waterproof design, so you can use them during outdoor activities like camping and hiking. 

These solar panels are also equipped with protection during transportation, enabling you to carry them without any concerns. Each pack comes with an Ecoflow 160W solar panel, kickstand case, user manual, and warranty card, so you don’t have to make any additional purchases. 

• They can be folded for easy storage 
• Comes in a complete kit
• Suitable for different outdoor activities
• Can only be paired with an Ecoflow power station

The Best Solar Panels for Boats Buying Guide

What to consider when buying solar panels .

Since solar panels are an expensive addition to your asset list, here are a couple of essentials to remember when purchasing. 

The size of panels is directly related to the size of your boat. You must get something to match the energy requirements of your boat or greater. A solar panel too small might not power it and leave you frustrated. Other than this, smaller products have less battery time which means they will turn off much quicker than something explicitly designed for the size of your boat. 

From PVC to glass covering and fully flexible panels, the type you choose determines their cost. This helps you establish your budget according to your needs. A glass-fronted solar panel is among the most budget-friendly options, but they are not as weather resistant. Besides this, a polycarbonate version is more expensive, but they are incredibly weather resistant and have a longer life. 

Accessories 

A charge controller or maintainer is an essential component available for your boat’s solar panels. This product protects your panels from battery damage. They prevent any risk of overheating, battery discharge, or sudden drops. A charge controller is essential if you want to elongate the battery’s life. Most brands also offer mount brackets, so you don’t have to purchase them separately. 

How Do Solar Panels for Boats Work? 

Solar panels for boats work just like any other portable energy provider. To install it successfully, you must have four components: the solar panel itself, charge controller, inverter, and battery. When solar panels in the boat hit sunlight, they convert it into the electrical current, supplying your boat with the required energy. 

Boat solar panels can work without a charger maintainer (controller), but there is a risk of overcharging your device. Therefore, you must keep it in place to avoid any risk of battery damage. 

The need for an inverter depends on the number of appliances that need a charge. For instance, if you wish to charge multiple devices other than the boat, consider buying a large-capacity product. 

You can opt for professional installation if offered by the brand or any other reputed company. But individuals who have the basics can do it all by themselves. However, you must make sure that all the relevant accessories are available at your convenience. 

Installation

The installation method is divided into three main stages. The first stage is to conduct an energy assessment. In this, you will determine the level of energy that your boat needs to function. Buy a panel that has a higher voltage than your requirements. This gives more room and flexibility to charge other devices. 

Check whether the solar panel can produce that level of energy. Once the capacity is determined, you can decide the exterior of your panels. In most cases, you choose between glass-fronted, polycarbonate, and fully flexible panels. 

What Are Care Requirements to Enhance the Life of Solar Panels for Boats? 

Caring for solar panels is essential as they are a long-term investment and should last accordingly.

Most solar panels are designed to last two to three decades. Caring for them is fairly simple but requires regular attention. All you have to do is keep them clean from dirt, leaves, and other obstructions. Solar panels from reputable brands always come with a warranty for a couple of years. 

Always get a professional repair from the brand in case of any damage. Even if your warranty has expired, we recommend taking your boat’s solar panels to a professional. They might cost a bit more than a local mechanic, but your panels get the treatment they require. 

Another factor to consider here is the useful life of your solar panel. This indicates that they will not be as effective as they age. The depreciation in their quality is slow and gradual. 

If your product has met the end of its useful life, it won’t stop working but will get more prone to damage. So instead of getting frustrated with why your solar panel for boats isn’t working properly, consider getting a replacement from the same brand or changing your product. 

To clean a solar panel, use lukewarm water with a mild, non-acidic detergent and apply water pressure to remove any visible dirt and debris. Panels for boats are relatively smaller, so you won’t need a lot of supply. Clean any unwanted spots with a damp cloth and leave it to dry. Avoid applying water pressure on smaller models as they might not sustain the burden.

What Are the Properties of Charge Controllers for Solar Panels for Boats? 

Charge controllers are an essential component. They help protect your panels’ battery from damage. There are three main types of charge controllers available. 

Basic charge controllers 

They use pulse width modulation to encode transmission information allowing control of the power supplied to boats or other devices. These are simple chargers that come in at an affordable price range. A primary charge controller is designed to control batteries of smaller solar panels. They might not deliver desirable results if connected with a high-capacity panel. 

Mid-range charge controllers

These controllers also use pulse width modulation but feature an LCD display to indicate current charging levels. This helps the user keep track of the system and unplug the device when it’s ready to use. 

Max power charge controllers 

Designed for high-end and powerful solar panels, they are one of the most expensive charge controllers. You should only attach them to devices recommended by the brand itself. They also maximize the performance of panels. 

Conclusion 

Solar panels are a great way to maximize energy efficiency in your boat and create a durable backup. They are available in different sizes and capacities, so you can find a suitable fit for your boat. This article carefully reviewed the most in-demand solar panels for boats in 2024 that can make a difference in your overall experience. Besides the panel, you should also grab a top-notch charge controller that protects the device from damage and enhances its life.

People Also Asked

Yes, you can run a trolling motor with solar panels, but it is essential to opt for a device that has suitable capacity.

If the panel is according to the desired capacity of the boat, it might take 4 to 6 hours for a full charge.

Solar panels reduce carbon emissions and save money by reducing fuel costs. They also reduce the noise levels caused by a fuel-ignited engine.

Article Contributors

Sail magazine review team.

SAIL Magazine Review Team reports on best-selling products in sailing and boating. SAIL Magazine is reader-supported: When you buy through links on our site, we may earn an affiliate commission. Artificial Intelligence (large language models) may have been used in the research and creation of the content.

To ensure questions about product testing or a specific article are addressed, please contact [email protected]

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Best Solar panels for off-grid power and keeping batteries charged

• Phil Sampson
• November 28, 2022

We take a look at 6 of the best solar panels for boats, from folding units to cutting-edge flexible panels

Free power forever? If only it was that simple! Photo: Graham Snook

For many in the boating community, solar panels represent something of a holy grail. They are, after all, the gift that keeps on giving, aren’t they? Free power forever, (or many years anyway), coupled with zero running costs – what could possibly be better than that?

All you have to do to make this dream come true is banish the memory of the purchase price from your mind – something boaters are notoriously adept at doing – and wait for the sun to shine. If only it were that simple…

The fact of the matter is that there are costs associated with solar panels beyond the price of the panels themselves. While some types of panels can be simply laid on the deck, in many cases some form of mount will be required.

Then there’s the wiring to hook them up to your battery, plus any fitment and/or cosmetic work needed to hide the cabling from view. If your panels are to be left connected permanently, you’ll require a regulator too.

This will prevent both overcharging and a reverse flow of power out of the battery after dark. If you do not fit a regulator, a blocking diode can be used to halt the reverse flow instead.

But once all of the above have been overcome – and providing you’ve done your homework to ensure your panels will generate sufficient power to cover your needs – then, yes, it’s a power free for all!

There are many other benefits to boat solar panels too: First and foremost, they work all on their own – solar panels are automatic, so you can just let them get on with the job.

Apart from the occasional wipe over and a wiring check, they’re largely maintenance-free too. Unlike wind generators, (especially like the one with wonky bearings on that boat moored next to you), they don’t make any noise.

And finally, your batteries will be pleased, because keeping them from going flat can extend their life.

Here’s our choice of the best boat solar panels.

6 of the best boat solar panels available right now

Giosolar 1,000W flexible solar panel

Best flexible boat solar panel

Delivering a mighty kilowatt of power, (not far off the amount used by a one bedroom house), this Giostar package comprises ten separate 100W panels, each of which is 1,050 x 540 x 2.5mm in size.

Capable of charging either 12 or 24V batteries, a kit of this magnitude is one for the most serious of solar enthusiasts – Eco Experts reckons 660-990W is sufficient for a liveaboard.

Giostar panels are abrasion resistant, anti-rust and dust proof and their junction boxes are sealed and waterproof. The panels are also light, thin and flexible, and can withstand being bent up to 30 degrees.

Reasons to buy: Incredible amount of power, panels are abrasion resistant as well as anti rust + dust proof

Reasons to avoid: Premium price

Price: £1,464.45

Buy it now on Amazon (UK)

Note: We may earn a commission when you buy through links on our site, at no extra cost to you. This doesn’t affect our editorial independence.

Ecoflow 160w portable solar panel.

Mobisolar 100W foldable solar panel

Best foldable boat solar panel

Mobisolar’s foldable panels are light (4.5kg) and measure 121 x 56.5 x 3 cm when unfolded, with the longest dimension reducing to 60 cm when folded, making them easy to transport.

The panels use advanced technology to provide superior performance, with each panel subjected to a thorough testing routine before and after assembly.

So confident is Mobisolar in its products that the company stands behind its panels with a two-year defect warranty and a five years’ electrical performance warranty.

For maximum flexibility in operation, three USB power outputs are fitted per panel, one delivering 100W, the second 60W and the third 10W.

Reasons to buy: Foldable, lightweight and long warranty

Reasons to avoid: Not resistant to the elements, doesn’t feature mounting holes

Price: £145.00

Buy it now on eBay

Eco-worthy 100W solar panel kit

With 100W panels being ideal for keeping batteries topped up, our second offering in this power class is from Eco-worthy, a major player in the solar panel field.

Competitively priced, our link below is for a kit which includes an LCD control unit and four ‘Z’ brackets in addition to the panel itself.

The Eco-worthy 100W panel is of the monocrystalline type, which means their cells are made from an ingot grown from a single silicon crystal of high purity. It’s also a rigid panel, so this particular product would need to be mounted on a frame or flat surface.

Reasons to buy: Competitively priced, Features LCD panel, brackets

Reasons to avoid: Only a year warranty, not resistant to elements

Price: £113.99

PV Logic 20W Flexi solar panel

Offered by Force 4 Chandlery, this lightweight semi-flexible solar panel comes complete with a dual battery solar charge controller.

The panel is completely waterproof thanks to its six-layer, heavy-duty laminate finish, and should a wayward crew member plod over it in their size 9s the panel’s dimpled top surface is ‘self healing’.

The controller can handle both 12 and 24V systems and the panel’s PWM (Pulse Width Modulation) charging system is efficient and battery-lifetime friendly.

Supplied with LED battery-status indicators and 4 metres of cable, PV Logic Flexi panels can be bonded to flat or curved surfaces.

Reasons to buy: Lightweight, waterproof, dual controller

Reasons to avoid: Lacks mounting options

Price: £149.95

Buy it now on Force 4 Chandlery

Powoxi 10W solar panel

At the budget end of the market comes this Powoxi 10W solar panel charger kit. While you won’t go far on just 10W of power, this kit claims to be capable of charging and maintaining various 12V batteries.

The kit features a fully automatic charging and maintenance controller, which provides intelligent three-level charging and protection against short- and open-circuits, under voltage and overloading.

A reverse flow system is included and the interface is described as ‘plug and play’. While the panel is rainproof, it will not withstand immersion in water, so this is a product to perhaps leave behind on the dock when you take to the water.

Reasons to buy: Great budget option, plug and play

Reasons to avoid: Not waterproof, won’t go far on 10V

Price: £27.59

Eco-worthy 10W/5W solar panel

The least pricey option we could find anywhere, this baby 5W solar panel is simply a trickle charger. But if that’s all you need then look no further, for this is another Eco-worthy product.

The technology in the panel is polycrystalline, so it’s not the most efficient on the market, but for this power that’s hardly a great concern.

The panel is supplied with two charging options; a pair of crocodile clips which attach directly to the battery, and a cigarette lighter plug.

According to the product’s eBay listing, this seller alone has sold approaching 3,000 of these units – and at this price, we can understand why!

Reasons to buy: Incredible price, can be charged via car lighter plug

Reasons to avoid: Small, not very efficient

Price: £9.99

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• Learn About Solar Energy

Top 5 Best Solar Panels for Boats (2024 Marine Buyer’s Guide)

In this guide, you’ll learn:

• Why photovoltaic (PV) equipment is great to have on your boat
• Which panels are best suited for use on the water
• What qualities make for a great boat solar panel

Note:   In July 2024, SunPower notified dealers it would be halting all new shipments and project installations. The company also noted it would “no longer be supporting new Leases and PPA sales nor new project installations of these financing options.”

Why Should You Install Solar Panels On Your Boat?

Before we dive into the best panels to bring your boat into the world of clean energy, it’s worth discussing why you’d want a solar panel system on your boat in the first place.

There are a few use cases that are important to consider. These not only dictate whether or not you need panels on your boat, but they can also help you decide which system is the best and most cost-effective for you. We’ll discuss the different reasons to go solar on your boat below.

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• Doesn't offer solar batteries (coming 2022)

Charging Emergency Equipment

For anyone who has run into issues out at sea, the need for reliable emergency equipment is well understood. Whether you run out of gas, your boat breaks down or you have some other issue that precludes you from getting back to shore, having a way to reach out for help will keep your mind at ease.

Depending on the type of boat you have and how well it’s equipped, you may have a radio system, a satellite phone, a regular phone or some other communication device for emergencies. All of these require power, and having a solar system on your boat ensures that you’ll always have access to these devices.

Charging Recreational Equipment

Even if you’re not running into problems at sea, you might want the ability to charge recreational equipment. It’s always nice to have the ability to charge smartphones, e-readers, speakers and other devices you might use for entertainment.

This is especially important if you plan on spending a few days at sea and don’t want to rely on your boat’s batteries. Keeping those well charged for lighting, navigation tools and starting your boat’s engine is more important than getting your phone up to a full charge.

Quality of Life at Sea

For a lot of people, there’s a lot of joy in upgrading life at sea and making things just a little more comfortable. One of the perks of installing a solar system on your vessel is that you don’t have to worry about using your boat’s batteries for non-necessities.

For example, many recreational boaters connect their solar array to an electric cooler. Others use their solar modules to power electric water heaters for hot showers and constant hot water.

The possibilities for improving your at-sea experience with solar are really up to you, which is part of what makes bringing renewable energy to your boat so exciting.

What Are the Top 5 Best Solar Panels for Boats?

If you’re convinced you want to install solar on your boat, but you don’t know much about the available options, you might be overwhelmed by the choices. You’ll have access to seemingly countless brands and models.

To help you narrow down your options and choose panels that will meet your needs, we’ve done extensive research and chosen just a few product lines that we recommend. We’ll provide a quick breakdown of the different options below, and we’ll dive deeper into the specifications in later sections.

SunPower 170W Solar Panel

SunPower is a leader in the residential solar industry, so it’s no surprise that we found that the company also makes the best solar panels for use on boats.

This panel is pricey, but it’s significantly more powerful than most other options. At 170 watts, you can use these panels to charge your boat’s main battery, provide backup power for emergencies, or live large on the water by powering coolers, hot water heaters and much more.

This panel doesn’t come with a solar charge controller like many other options do, so not only is it expensive, but you’ll have to lay out more money for a controller, inverter and battery. However, we believe the efficiency and power output are well worth the investment.

These panels are also rated with a waterproof rating of IP67, which means they can withstand immersion in water up to about three feet for around half an hour. If you need more protection than that, you have bigger problems on your hands than losing a panel.

• High-efficiency panel for maximum power
• High-quality, durable materials
• Trusted and reliable brand
• Waterproof up to a meter for 30 minutes
• Doesn’t include any equipment other than the panel

Renogy 100W Flexible Marine Solar Panel

The Renogy Flexible solar panel designed specifically for use on the water is our pick for the best bang for your buck. It’s about half the price of the SunPower panel, although it does have a little more than just half the power capacity.

At 100 watts, this panel is great for middle-of-the-road power. It can serve as a reliable backup source of energy, or you can use it to recharge phones, GPS devices, e-readers, laptops and other electronics. It’s possible to use it for the quality-of-life items mentioned above as well.

This panel also has an IP67 waterproof rating, which is ideal for maintaining peace of mind on the water. Although it’s less expensive than our top pick, it includes a controller and wiring to connect your panels. You’ll just need an inverter and a battery to complete your setup.

• Excellent power output
• IP67 waterproof rating
• Includes controller and wiring
• Reliable brand name
• More expensive than many other options
• Doesn’t include a battery or inverter

EcoWorthy 25W Solar Panel Kit

The EcoWorthy solar panel kit is one of the easiest photovoltaic (PV) systems to install, so it’s our top pick for those looking to get started with clean energy. You can purchase this kit with a 10 amp-hour (AH), 12-volt battery, and the MC4 connectors are plug-and-play for a quick and painless installation.

This panel has a much smaller output than our top two picks, so it’s best reserved for backup power or for charging cell phones and other small electronics.

This kit has a waterproof rating of IP65, which means it can withstand being submerged in around five feet of water for up to a half hour, and it will also be protected from sprays of water. This is a great option for maintaining peace of mind when you’re on the water, especially if conditions are rough.

Lastly, the kit includes a panel, a controller and wiring, so you’ll just need to add a battery and an inverter to complete your kit.

• IP65 waterproof rating
• Includes a controller and wiring
• Very affordable
• Significantly less power than our top picks – Only ideal for light-duty use

NewPowa 30W Solar Panel Kit

This 30 watt solar panel kit from NewPowa includes a panel, a controller and wiring. If you add a backup battery and an inverter, you can create a complete off-grid solar kit for less than $150 without leaving your home (thanks to Amazon).

With an output of 30 watts, this is the best marine solar panel for light-duty use, although you could use it for non-essential electronics like an electric cooler or a small solar water heater. Those more demanding devices should be low-use, though.

The panels and controller are IP67-rated, so they’re suitable for use on just about any boat.

Best of all, the partial solar kit is just $60, so this makes our list as our top budget pick for going solar without breaking the bank.

The kit has pre-drilled mounting holes and is compatible with a wide variety of mounting brackets. As such, your installation process should be relatively straightforward.

• Includes a controller and plug-and-play wiring
• Relatively low wattage

TopSolar Monocrystalline Solar Panel Kit

The off-grid solar kit from TopSolar is a great affordable option, and it’s what we’d recommend as a starter kit for backup energy for beginners. It only puts out 20 watts, so this is not the best option if you’re looking for something to charge your recreational devices or quality-of-life equipment. However, it’s an affordable and easy-to-install kit for emergency power.

Unfortunately, this kit doesn’t include a specific ingress protection (IP) rating, but the manufacturer does note that the product is waterproof. Based on customer reviews, it appears that this product is safe for use on the water.

The kit includes a small PV panel, a controller and wiring, so you’ll need to buy an inverter and battery separately if you want AC power or backup power.

Best of all, the kit is super easy to install. It has pre-drilled holes and is compatible with most mounting brackets and clips.

• Great option for backup power
• Easy to install
• No official IP rating
• Low wattage

What Should Boat Owners Look for When Buying Solar Panels?

Solar panels can be a great option for marine use, but not all panels and solar kits are suitable for use around water. Additionally, the panel you choose needs to be selected based on how you want to use your solar power system.

In the sections below, we’ll include a few key things you’ll want to consider when choosing a solar module for your boat.

Energy Needs

One of the first things we recommend thinking about is how much energy you need your panels to generate. This will help guide you to what size panel and how much energy output you need.

If you’re just looking for reliable backup power for your boat’s internal 12-volt battery, or you want your panels to provide power for emergencies only, you’ll probably only need a panel of around 20 watts.

If you use your boat frequently for entertaining guests, or you spend days at a time on your boat, you might want something above 100 watts to provide backup power plus electricity for electric coolers, water heaters and more. Consider everything you’ll use your solar array for and size your system accordingly.

The chart below provides a quick breakdown of what size solar panels you need for different purposes on a boat.

If you plan on using your panels to replace an on-board generator, you can calculate how much electricity your boat uses and then size your system accordingly. It’s always advisable to go a little bigger than you think you need, as cloud coverage and the angle of the sunlight hitting your panels can cause fluctuations in solar power production.

If you have high energy needs, we also recommend considering a Maximum Power Point Tracker (MPPT) controller, which is more efficient than a Pulse Width Modulation (PWM) controller, which is more common.

Space Available for Installation

Just like residential solar systems are limited by available roof square footage, marine solar systems are limited by the available space for installation. This is an important consideration to make to ensure you don’t buy a panel that you won’t be able to mount or use in your vessel.

Before you buy any equipment, we recommend checking the measurements of the panel and deciding where on your boat you can install it. Some portable, foldable panels come with kickstands for temporary setups, but the smaller of our top picks can be set up just about anywhere without mounting brackets as well.

Type of Solar Panel

You’ll have a few choices for the type of panel you purchase for your boat as well.

First, you’ll need to decide between thin-film solar panels, polycrystalline solar panels and monocrystalline solar panels.

• Monocrystalline panels are the most efficient, so they’re the best suited for use on boats. The higher efficiency ratings will let you produce more energy per square foot, which is essential on a boat where space is limited. All of our recommendations above are monocrystalline.
• Polycrystalline solar panels can also work, but they won’t provide as much solar power.
• Thin-film panels are the most affordable, but they generate even less electricity and aren’t ideal for use where available space is minimal.

Second, you should think about whether you want a rigid solar panel with an aluminum frame or a semi-flexible one. Flexible panels contain special solar cells that can be a bit pricier, but they’re easier to install and are a bit more versatile. They can be mounted on curved surfaces, giving you more placement options.

Waterproof Rating

Since you’ll be using your panels on the water, it’s essential that you choose one with a good waterproof rating. Some of the best options are IP67 and IP65. These will ensure your panels and charge controllers or regulators remain safe and at low risk of fire even when exposed to moisture and direct water contact.

Accessories

Finally, you should consider what your kit comes with. Some come with only panels, so you’ll need to buy a controller, an inverter and a battery to complete your setup. Some come with a combination of these parts, although batteries and inverters aren’t commonly included. Some panels also include mounting brackets, although this is also uncommon.

Thinking about the additional equipment you’ll need to purchase after buying your panels will help you budget more effectively for your entire system.

How Do Solar Panels Work With Boats?

PV panels for boats work just like panels for residential use — they collect sunlight and route the energy either to a storage or use system.

Since boat solar systems are entirely off-grid, most require the following:

• Solar panels
• A charge controller
• An inverter
• Mounting brackets or other mounting hardware
• A backup battery for energy storage

We’ll explain what each of these components does in the section below, and then we’ll get into how to set up and maintain your system.

Equipment for a Marine Solar System

The main components you’ll absolutely need for your boat solar system are PV panels and a controller. If you plan to store energy or use it to charge common electronics, you’ll also need a battery and an inverter.

The panels are the pieces of the system that collect energy from the sun. The electricity generated is then passed to your controller, which limits the amount of power that flows through the wires to your battery or device.

The charge controller helps prevent overcharging batteries or electronics when production is high, and it also prevents battery drainage when production is low. Some panels are equipped with bypass diodes to provide the same safety features.

The solar energy that’s collected is direct current (DC), while most electronics, including standard light fixtures, use alternating current (AC) power. An inverter is used to convert DC current to AC so that you can use your solar power to power devices directly. If you don’t have DC lights in your boat, for example, an inverter might be necessary to provide lighting.

A battery storage system is exactly what it sounds like: it’s a battery bank that stores solar energy for later use.

Solar batteries are useful for two main reasons on boats.

• First, if you ever experience cloudy days, your solar production might very well drop below what you need to provide power to your devices. In that case, having a battery to pull stored energy from can be helpful in maintaining charging capability or electricity.
• Additionally, a battery on board can be useful for maintaining backup power for emergencies. If your boat’s built-in battery ever fails or you need to charge emergency communication or navigation devices, a battery will come in handy.

Installation

Since you want your solar panels to be exposed to as much sun as possible, it’s best to install them at or near the highest point on your boat — often the bimini. This will prevent them from getting shade from other parts of your boat during the day, regardless of which direction your vessel is moving.

It’s also typically best to install your panels as close to parallel with the surface of the earth as possible. Since your boat will be moving around a lot, it’s not realistic to install them facing the path of the sun in the sky as you would on a home. Laying them flat gives you the best chance of always collecting at least some sunlight.

You, of course, need to consider available space as well, so remember to take measurements of your installation site and compare them to your panels before beginning the process.

Finally, you should consider where your batteries will be — if applicable — and where your wiring will run once your installation is complete. Keeping these things in mind will help ensure that the installation process goes as smoothly as possible.

Below, we’ll include a brief step-by-step guide on how to install a solar system on your boat.

• First, take measurements of where your panels will be installed, the path the wiring will take to all components and where your battery, inverter and controller will be placed. Making sure you have enough room for all of your components will help avoid headaches once you get started.
• We recommend mounting your batteries, inverter and controller first. These are generally the easier components to mount, so they’re the easiest to move once installed.
• Next, mount your panels. The process for this will depend on the panels you choose and where you plan to install them. You should follow the installation instructions for the mounting brackets or hardware you purchase.
• Finally, you can wire your system, beginning with the connection between the panels and the controller and then the connections to the inverter and battery.
• You can test your system by using a voltmeter or by checking to see if your powered devices function as intended. Some controllers will also show you if your panels are providing energy and how much they’re producing.

For more guidance and information on how to set up your boat solar system, you can check out the video below:

Maintenance

Thankfully, solar systems are relatively maintenance-free once installed, although you should carry out routine system checks and cleaning to ensure you continue to enjoy maximum safety and energy production.

You should spray down your panels with water about once every six months to get any accumulation of dirt or salt off of them. This will help maximize energy generation. Around the same time, you should also check the wires and connectors for corrosion, which is more likely to occur if you use your boat in saltwater.

After major storms, it’s a good idea to ensure that none of the connections between components were lost. A simple disconnect could lead to your battery charging issues, which could be an issue if you ever need backup power.

Lastly, it’s worth mentioning that solar systems on boats are generally considered safe. There is a small risk of fire but provided you carry out the proper maintenance, you should avoid any serious issues.

Are Marine Solar Panels Worth It?

The answer to this question really depends on who you ask. For some boat owners, PV panels are essential. Not only can they provide backup power for emergencies, but they can also improve your quality of life at sea and the enjoyment of your boat.

For many people, these things are indispensable, so solar systems are well worth the investment. For certain types of boats — like small fishing boats and sailboats — solar panels will be the only source of electricity.

Other boat owners feel comfortable relying on generators if they have them, and some use their boats only for short durations, which makes having an on-board solar array less valuable.

For most people, though, having at least a small solar system to provide backup power for emergencies is worthwhile. From there, opting to up the size of your system to improve your time at sea isn’t hard to get behind.

FAQ: Marine Solar Panels

Below, we’ll answer a few of the most common questions we get about solar panel systems made for boats.

What are the best marine solar panels?

In our opinion, the best solar panels for boat use are the SunPower 170W solar panels. These are flexible panels that allow for easy and versatile installation.

They are some of the most efficient panels suitable for boat use, and they provide an incredible 170 watts each. This is enough power for just about anything you need electricity for on your boat and for emergency equipment in low-light conditions.

These panels are a bit expensive, and they don’t come with any additional equipment. However, the junction boxes have a waterproof rating of IP67, come with a five-year warranty for equipment and high efficiency and are made from high-quality, durable materials for years of use.

Will solar panels keep my boat battery charged?

Yes, solar panels can be hooked up to keep your boat’s 12 volt battery charged. However, you need to make sure you install a system that is sized appropriately for your boat’s needs.

You can check how much power your boat draws from its battery system by looking at the loads (in amps or watts) of each device. You can also use your battery monitor if you have one to check the energy demand of each individual component pulling power. Then, choose solar panels that produce a bit more energy than your system needs.

If you live in an area that experiences a lot of cloudy weather, you might want to size up your system even more to ensure your system generates enough electricity.

How much does it cost to put solar panels on a boat?

The cost to install a solar array on your boat can range from around $150 up to well over $1,000. Where in this range your total falls depends primarily on how much energy you need to produce.

If you’re looking for portable solar panels to take on and off a small boat with you for emergency use only — which is typical for sailboats and smaller boats that don’t normally have electricity — you’ll likely be looking at the $150 end of the spectrum.

If you have a much larger boat and want to be able to maintain power for your essential equipment and some non-essentials, then you’ll likely push your all-in cost closer to the higher end of the range.

What are the benefits of solar panels on boats?

Installing solar panels on your boat can provide quite a few key benefits, although the perks you’ll actually experience depend on your situation and your specific boat.

Perhaps most importantly, solar panels can charge your boat’s battery and maintain electricity for emergencies. Most systems — even small ones — can serve to charge your phone, GPS or other emergency devices in case you run into problems out on the water.

Larger systems can also provide power for recreational use, like charging phones, powering speaker systems, keeping beer cold and more.

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The Best Marine Solar Panels of 2024

Recharge batteries and power up marine electronics by using the sun’s energy..

Singapore-based Azura Marine unveiled a new $500,000 electric yacht that they claim can complete “non-stop ocean voyages powered only by sunlight.”

The electrification of transport is slowly spreading into maritime transport.

While the focus has been commercial vehicles like ferries, it is also reaching leisure and personal vessels.

Azura Marine is the latest to enter the space with its first solar-powered catamaran yacht, the Aquanima 40 series, unveiled earlier this month in Bali, Indonesia.

The company describes the electric vessel:

“She is a unique 4 cabin, 8 guest yacht designed for extended cruising without any need for fossil fuels or refuelling stops of any nature. The Aquanima 40 solar-powered catamarans are also equipped with a 56 m2 rain catchment system, water maker and air conditioning water recovery – rendering water supply stops unnecessary too.”

Here are a few pictures of the Aquanima 40 series solar yacht:

Azura Marine claims that the vessel can continuously cruise thanks to its large 10 kW solar power system and 60 kWh battery pack.

Here are some of the specs of the Aquanima 40 series:

• LOA 13,25 m
• Draft 65 cm
• Propulsion Power: 2 x 10 kW
• Solar Power: 10 kW
• Main Battery Bank Capacity: 60 kWh

The company writes about the capacity of the electric vessel:

“For the owner, this means limitless cruising with no fuel costs, no noise or vibration, no smells, no polluting emissions and no disturbance of marine life.  The electric motors are virtually maintenance-free with only a couple of low-cost bearings to be replaced at 20,000 hours (more than a typical lifetime usage of a yacht).”

Here are some pictures from inside the electric yacht:

The company lists several amenities available onboard its new electric vessel:

“The yacht offers all the comfort to be expected of a modern cruiser with air conditioning, fully equipped galley including ice maker, hob and sink.  On this version, the bathroom and toilet is on main deck for greater ease of access as this vessel is strongly oriented towards enjoying the outdoors, exploring hidden bays with the electric dinghy or diving on pristine reefs. Onboard Solar Eclipse, all water is self-produced, including fresh and drinking water, thanks to the yacht’s water-maker, air conditioning water recovery system and gigantic rain water collecting solar roof.  She features a high quality marine sound system and all round WIFI connectivity.”

Azura Marine Co-Founder and CEO Julien Mélot commented on the launch of the new electric vessel:

“it was an enormous thrill to launch the yacht last week and undertake her first few miles at sea.  The yacht met all our expectations and while the design makes for near silent operation with exceptional responsiveness, it was incredible to actually experience it  – and all in the knowledge that we were not producing any harmful pollution or emissions.  With some strong winds and a very tight to enter marina berth, we were delighted by how easy the yacht was to manoeuvre.  We simply cannot wait to take her out on her maiden voyage.”

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Best Solar Panels For Sailboats of 2024

Sailing uses the power of the wind to move, so why not use the power of the sun to charge your batteries? Solar panels offer the best way to charge boat batteries. This method can also save the engine from being used just for charging. Getting the best solar panels for sailboats means choosing the right size and power for your boat.

But, how much power will you need? Will your panels be able to keep up even on cloudy days? Do you plan to sail in cold water or deep in the tropics? Do you need the panels to sit on a curved surface? There’s a surprising amount of factors to consider when purchasing sailboat solar panels.

Whether you’re replacing old panels or buying for the first time, let us do the hard work of comparing the best solar panels for your boat.

For more of our top sailing gear recommendations, check out the Best Wind Generators for Sailboats . 

QUICK ANSWER – THE BEST SOLAR PANELS FOR SAILBOATS 

• Nature Power Monocrystalline
• Nature Power Rigid
• Renogy Starter Kit (4 panels)
• Newpowa Poly Solar Panel
• Acopower Polycrystalline
• Nature Power 90W Rigid
• Newpowa 150W
• Suaoki SunPower
• Eco-Worthy Semi-Flexible

SAILBOAT SOLAR PANEL REVIEWS

Nature power monocrystalline.

Check out the latest price on: Amazon  | West Marine

BEST FOR: Efficient high-power use

WEIGHT: Unspecified

WATTS/AMPS: 120W/6.6A

SIZE: 45.1” x 33.6” x 3”

PROS: Foldable for easy storage and portability, pop-out legs that allow it to easily sit at an angle, sturdy design

CONS: On the upper end of the price spectrum, short warranty

NATURE POWER RIGID

BEST FOR: Energy-hungry boats

WATTS/AMPS: 165W/9.4A

SIZE: 57.8” x 26.3” x 1.4”

PROS: Powerful and efficient, scratch resistant and anti-reflective coating, well-built aluminum frame, easy-to-use connections

CONS: Powerful but expensive, only suitable for larger boats with a big flat space to set it up on

RENOGY STARTER KIT (PACK OF 4 PANELS)

Check out the latest price on: Amazon

BEST FOR: Large boats needing lots of power

WEIGHT: 18.0lbs

WATTS/AMPS: 400W/22A

SIZE: 4 x 47.0” x 21.3” x 2.0”

PROS: Includes x4 100W panels along with a charge controller and everything else needed to set up, ideal for sailors looking for a lot of power, easy mounting system, great price for a comprehensive kit

CONS: Rigid solar panels can only be on flat surfaces or mounted on rails, included charge controller might not be the charge controller for your needs

NEWPOWA POLY SOLAR PANEL

BEST FOR: Keeping small battery banks topped up

WEIGHT: 6.3lbs

WATTS/AMPS: 30W/1.7A

SIZE: 27.0” x 14.3” x 1.9”

PROS: Sturdy design, small and slim making it ideal for stern rail, wattage should be enough to trickle-charge medium battery banks, very affordable

CONS: Rigid design means placement is limited, heavy for a small panel

ACOPOWER POLYCRYSTALLINE

BEST FOR: Larger sailboat trickle-charging

WEIGHT: 6.9lbs

WATTS/AMPS: 35W/2A

SIZE: 29.9” x 16.1” x 1.7”

PROS: Looks neat with silver aluminum frame, should be able to easily keep batteries topped up and contribute to energy requirements when boat is in use, very affordable and slim, other wattages available

CONS: Weighty, aluminum frames can have sharp corners

NATURE POWER 90W RIGID

Check out the latest price on: West Marine

BEST FOR: Permanent mounting

WEIGHT: 15.2lbs

WATTS/AMPS: 90W/4.9A

SIZE: 33.7” x 26.5” x 1.0”

PROS: Sturdy frame can be mounted on gantry rails permanently, good power output and small enough to be mounted alongside an identical panel for double power, long warranty, reputable brand

CONS: Awkward to move about the deck so not ideal for portable panel, fairly heavy

NEWPOWA 150W

BEST FOR: Medium to large sailboats

WEIGHT: 24.4lbs

WATTS/AMPS: 150W/8.3A

SIZE: 58.4” x 26.6” x 1.2”

PROS: Great for permanent mounting, powerful and well-built,

CONS: Very heavy, only comes with 3ft of cable which may well be too short and require extension

SUAOKI SUNPOWER

BEST FOR: Smaller, lightweight sailboats

WEIGHT: 4.8lbs

WATTS/AMPS: 100W/5.6A

SIZE: 43.3” x 22.4” x 0.1”

PROS: 30-degree curve possible making this ideal for boat coach roofs, very thin makes for less dirt buildup and less wind resistance, good price for a powerful panel

CONS: Cable connections are on the top of the panel which may encourage corrosion and UV damage

ECO-WORTHY SEMI-FLEXIBLE

BEST FOR: Coach roofs and curved deck areas

WATTS/AMPS: 100W/5.5A

SIZE: 47.4” x 21.6” x 0.1”

PROS: Capable of a 30-degree curve making it suitable for coach roofs and curved decks, thin and durable construction

CONS: Connector on top allowing salt build-up and accidental damage

COMPARISON TABLE – THE BEST SOLAR PANELS FOR SAILBOATS 

HOW TO CHOOSE THE BEST SOLAR PANELS FOR SAILBOATS

1. required energy.

Buying solar panels for your sailboat involves more than going over a few models at random. You need to know how much power you’ll need daily. Also, you need to determine whether you will rely solely on solar power or use the engine as well.

SOLAR AND ENGINE

Will you use solar power most of or all the time? If yes, then you will need higher power, larger or more solar panels. If you plan to use the engine more, then you won’t need as much solar power.

Your sailing goals come into play in this decision. If you want to cruise the intercoastal waterways, chances are you’ll be using your engine a lot. If you plan on cruising the Caribbean, you can often rely on good winds for sailing.

Once you’ve worked out how you plan on powering your sailboat – solar and engine, or just solar – you’ll need to work out your daily amp draw . If you’ll be running a fridge, freezer, water maker, VHF and SAT NAV all day long, you’re definitely going to need a lot of power!

It can be difficult to determine how many amps your sailboat will need, especially if you still don’t have all the electronics you plan to bring on board. Some products will give you an idea of their power draw in their technical specifications. For others that don’t provide that information, you may have to settle for an estimate.

Once you have an idea of your daily amp draw, then you can work out the solar output required to keep up with that power draw. But there are other considerations too, namely, actual output vs maximum output.

ACTUAL OUTPUT VS MAXIMUM OUTPUT

While a 90W solar panel might sound like it’ll give out 90W, remember that this is its maximum output. That is, it refers to a clean panel in full sunshine. It won’t be giving anywhere near that output on cloudy days. In the case of a fixed panel, ask yourself if the sail will be casting a shadow over it on one tack.

Unless you plan on running the engine to top up the batteries on cloudy days, you will find yourself needing enough solar panel output for these times. Make sure to also consider the times when your panels aren’t giving out their optimum performance.

TEMPERATURE CHANGES

If you’re starting in Nova Scotia, your fridge won’t take much power to keep it at a cool temperature. But, what happens when you sail south to go diving in Mexico ? Suddenly, the water temperature is higher and the fridge would have to work twice as hard to stay cool. While good insulation is a bonus on a sailboat, it’s important to remember that atmospheric changes like temperature may mean an increase (or decrease) in your power requirement.

ARE WE TALKING AMPS OR WATTS?

While you need to know how many amps your sailboat will draw on a daily basis, solar panels are sold by watts. There’s no need for that to be confusing though, as we’ve also provided the amps in the chart. You can read more about watts and amps to get a better understanding.

2. HOW MANY SOLAR PANELS DO YOU NEED?

Many sailboats have more than one solar panel. This means you won’t need to move the panels to follow the sun or as the boat shifts at anchor. Having multiple solar panels also allows you to have smaller panels, which tend to get in the way less. Your required power output can be divided among them as well.

If you need 200W a day, then you could have three 90W solar panels on different parts of the boat and be covered power-wise, even on different tacks.

How much space do you have on deck? Where you place your solar panels is very boat and sailor dependent. Day-sailing in hot places? Solar panels on the bimini rack are an easy solution. Long-distance cruising? You’ll need solar panels that are efficient yet out of the way to improve windward performance.

If you spend a large amount of time on board, your energy consumption will be higher. You’ll need your solar panels to be as efficient as possible. Many cruisers have panels on top of gantries on the stern to keep them in sunshine all the time. This is terrible for sailing performance, so you have to think about where you want to compromise. Don’t forget to consider the other on-deck items, such as your paddle board , as well.

Solar panels generally come in two types: mono- and multicrystalline and amorphous thin film silicone. However, all solar panels listed in this article will be mono- or multicrystalline as they are the most effective.

MONO- AND MULTI-CRYSTALLINE

Efficient and sturdy, these panels will probably make up your core solar panel collection. For everything on board like lights, fridge, radio and navigation electrics, mono-and multicrystalline are your best bets. They aren’t forgiving on cloudy days though, and even a shadow over the corner of a panel will pull down the output by a lot.

AMORPHOUS THIN FILM SILICONE

Not as efficient as crystalline panels, amorphous panels are cheaper and flexible. They’re good for trickle-charging batteries while the boat is left unattended.

Solar panels are expensive, but their prices have been dropping over the years. If you only use your sailboat for summer weekends, chances are you won’t need pricey, hyper-efficient panels. You just need enough to keep up with your power consumption for two days a week and let the trickle-charge solar panel do the rest.

Take your solar panel budget and split it between the number of solar panels you think you’ll need. Keep in mind though that you’ll most likely need to buy a charge controller as well.

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Best boat solar panels: 6 options for boosting your yacht’s power

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We take a look at 6 of the best solar panels for boats, from folding units to cutting-edge flexible panels

Free power forever? If only it was that simple! Photo: Graham Snook

For many in the boating community, boat solar panels represent something of a holy grail. They are, after all, the gift that keeps on giving, aren’t they? Free power forever, (or many years anyway), coupled with zero running costs – what could possibly be better than that?

All you have to do to make this dream come true is banish the memory of the purchase price from your mind – something boaters are notoriously adept at doing – and wait for the sun to shine. If only it were that simple…

The fact of the matter is that there are costs associated with boat solar panels beyond the price of the panels themselves. While some types of panels can be simply laid on the deck, in many cases some form of mount will be required.

Then there’s the wiring to hook them up to your battery, plus any fitment and/or cosmetic work needed to hide the cabling from view. If your panels are to be left connected permanently, you’ll require a regulator too.

This will prevent both overcharging and a reverse flow of power out of the battery after dark. If you do not fit a regulator, a blocking diode can be used to halt the reverse flow instead.

But once all of the above have been overcome – and providing you’ve done your homework to ensure your panels will generate sufficient power to cover your needs – then, yes, it’s a power free for all!

There are many other benefits to boat solar panels too: First and foremost, they work all on their own – solar panels are automatic, so you can just let them get on with the job.

Apart from the occasional wipe over and a wiring check, they’re largely maintenance-free too. Unlike wind generators, (especially like the one with wonky bearings on that boat moored next to you), they don’t make any noise.

And finally, your battery will be pleased, because keeping it from going flat can extend its life.

Here’s our choice of the best boat solar panels.

6 of the best boat solar panels available right now

Giosolar 1,000W flexible solar panel

Best flexible boat solar panel

Delivering a mighty kilowatt of power, (not far off the amount used by a one bedroom house), this Giostar package comprises ten separate 100W panels, each of which is 1,050 x 540 x 2.5mm in size.

Capable of charging either 12 or 24V batteries, a kit of this magnitude is one for the most serious of solar enthusiasts – Eco Experts reckons 660-990W is sufficient for a liveaboard.

Giostar panels are abrasion resistant, anti-rust and dust proof and their junction boxes are sealed and waterproof. The panels are also light, thin and flexible, and can withstand being bent up to 30 degrees.

Price: £1,464.45

Buy it now on Amazon (UK)

Note: We may earn a commission when you buy through links on our site, at no extra cost to you. This doesn’t affect our editorial independence.

Mobisolar 100W foldable solar panel

Best foldable boat solar panel

Mobisolar’s foldable panels are light (4.5kg) and measure 121 x 56.5 x 3 cm when unfolded, with the longest dimension reducing to 60 cm when folded, making them easy to transport.

The panels use advanced technology to provide superior performance, with each panel subjected to a thorough testing routine before and after assembly.

So confident is Mobisolar in its products that the company stands behind its panels with a two-year defect warranty and a five years’ electrical performance warranty.

For maximum flexibility in operation, three USB power outputs are fitted per panel, one delivering 100W, the second 60W and the third 10W.

Price: £145.00

Buy it now on eBay

Eco-worthy 100W solar panel kit

With 100W panels being ideal for keeping batteries topped up, our second offering in this power class is from Eco-worthy, a major player in the solar panel field.

Competitively priced, our link below is for a kit which includes an LCD control unit and four ‘Z’ brackets in addition to the panel itself.

The Eco-worthy 100W panel is of the monocrystalline type, which means their cells are made from an ingot grown from a single silicon crystal of high purity. It’s also a rigid panel, so this particular product would need to be mounted on a frame or flat surface.

Price: £113.99

PV Logic 20W Flexi solar panel

Offered by Force 4 Chandlery, this lightweight semi-flexible solar panel comes complete with a dual battery solar charge controller.

The panel is completely waterproof thanks to its six-layer, heavy-duty laminate finish, and should a wayward crew member plod over it in their size 9s the panel’s dimpled top surface is ‘self healing’.

The controller can handle both 12 and 24V systems and the panel’s PWM (Pulse Width Modulation) charging system is efficient and battery-lifetime friendly.

Supplied with LED battery-status indicators and 4 metres of cable, PV Logic Flexi panels can be bonded to flat or curved surfaces.

Price: £149.95

Buy it now on Force 4 Chandlery

Powoxi 10W solar panel

At the budget end of the market comes this Powoxi 10W solar panel charger kit. While you won’t go far on just 10W of power, this kit claims to be capable of charging and maintaining various 12V batteries.

The kit features a fully automatic charging and maintenance controller, which provides intelligent three-level charging and protection against short- and open-circuits, under voltage and overloading.

A reverse flow system is included and the interface is described as ‘plug and play’. While the panel is rainproof, it will not withstand immersion in water, so this is a product to perhaps leave behind on the dock when you take to the water.

Price: £27.59

Eco-worthy 10W/5W solar panel

The least pricey option we could find anywhere, this baby 5W solar panel is simply a trickle charger. But if that’s all you need then look no further, for this is another Eco-worthy product.

The technology in the panel is polycrystalline, so it’s not the most efficient on the market, but for this power that’s hardly a great concern.

The panel is supplied with two charging options; a pair of crocodile clips which attach directly to the battery, and a cigarette lighter plug.

According to the product’s eBay listing, this seller alone has sold approaching 3,000 of these units – and at this price, we can understand why!

Price: £9.99

The Navy’s Newest Submarine Is Finally Here—and It’s Still No Match for China

The USS Idaho joins a vital—but painfully slow-growing—sub fleet .

• The USS Idaho , the U.S. Navy’s latest Virginia- class attack submarine, officially launched last week after taking seven years to build.
• The Navy is going to need more submarines to rival China’s naval buildup but won’t get the number it needs for nearly 30 years.
• The ideal number of attack subs is 66, but Naval production is only on track to get to 48 by 2030 and 56 by 2040.

New Kid on the Block

The submarine, P.C.U. Idaho , is the 26th Virginia -class nuclear-powered attack submarine. The sub, which was built by Electric Boat and Newport News Shipbuilding and took seven years to complete, was christened in March 2024 in Groton, Connecticut, after its construction was lengthened by COVID-19 and supply chain disruptions. Per tradition, the ship is temporarily designated P.C.U., or Pre-Commissioning Unit. The ship takes on the USS. designation, or United States Ship, once it is commissioned and handed over to the fleet.

Idaho is 377 feet long with a beam (width) of 34 feet. It displaces 7,900 tons underwater, three times more than its ancestor, a World War II Gato -class submarine. A single S9G (the G stands for General Electric) nuclear reactor drives a pump-jet propulsor instead of a traditional propeller screw, enabling the sub to reach a top speed of 25 knots. Like all nuclear-powered ships it has virtually unlimited range, its endurance limited only by the ship’s food supplies for the 135-person crew. Each has four 533 mm torpedo tubes, the standard torpedo diameter since well before World War II, enabling it to fire Mk. 48 ADCAP heavyweight torpedoes and sub-harpoon anti-ship cruise missiles.

The Navy has slowly improved the Virginia class over time in a series of blocks, a cost-saving measure over building a completely new boat that started with Block I. Idaho is what is referred to as a Block IV boat. One improvement introduced with the Block III boats is the swapping of twelve individual vertical launch silos, each of which could carry one Tomahawk cruise missile, with two 87-inch diameter Virginia Payload Tubes, each of which can carry six Tomahawk missiles. According to the Navy , the tubes are designed to “simplify construction, reduce acquisition costs, and provide for more payload flexibility than the smaller VLS tubes due to their added volume”

Idaho will remain pierside as shipyard workers install necessary equipment. According to the USS Idaho Commissioning Committee , she is due to be commissioned into the fleet in Spring 2025.

Preparing for War

Idaho enters the fleet as the U.S. submarine force is about to ungergo major changes. Submarines are viewed as a major fleet asset in a potential war with China, capable of crossing the Pacific quickly and taking up station in the Western Pacific. At least one submarine is thought to be in the Philippine Sea at all times. Today U.S. Pacific Fleet submarines are based in Guam, Washington State, and Hawaii. Under the new Australia-United Kingdom-United States (AUKUS) agreement, U.S. submarines will operate out of Australia by 2027 , vastly decreasing the time needed to reach “WestPac” in a crisis.

In the meantime, the U.S. is attempting to grow the submarine fleet as a counter to China’s growing navy. Although China’s own naval fleet is growing fast, it has no practical experience in anti-submarine warfare, and its submarines are easily a generation, if not two, behind American subs. Coupled with a submarine’s ability to stalk and ambush surface ships, Navy planners believe that America’s fleet of Los Angeles , Seawolf , and Virginia -class submarines will punch above their weight in a conflict with China, but there is still a consensus that the fleet must grow—fast.

Unfortunately, while the submarine fleet will grow, it won’t happen fast. By 2030, the Navy anticipates having 48 attack submarines and 12 ballistic missile submarines on hand. By 2040, the Navy will have 56 attack subs and 13 ballistic missile subs. According to the latest projections, Navy won’t reach its goal of 66 attack subs until 2054, thirty years from now.

Why is the fleet growing so slow? A smaller defense budget is one reason: defense spending accounts for only 2.7 percent of the GDP , the lowest since 1999, compared to 5.7 percent in 1985, at the height of the Cold War, and 8.6 percent during the Vietnam War. Other factors include a withered industrial base, with fewer shipyards and thus fewer facilities to build submarines, as well as fewer trained workers. American shipyards are also building three Virginia s for the Royal Australian Navy, which, although the work will detract from the Navy’s total, the subs will still go to a fleet strongly allied with the United States—and against China.

Changes Full Steam Ahead

One of the biggest changes to the submarine fleet is the upcoming replacement of the 14 Ohio -class ballistic missile submarines, each of which carries up to 20 Trident II D-5 nuclear-tipped missiles, with 12 new Columbia- class boats, each with 16 Trident II missiles. The first Columbia -class boat, the USS District of Columbia , is expected to be complete by 2027 and begin its first nuclear deterrence patrol in 2031. As more Columbia s enter the fleet, the Ohio s will retire, with the last Columbia expected to be completed by 2041. There is some question, however, whether 12 submarines will be able to deter both Russia and China, the latter of which is embarking on a major nuclear buildup .

In the early 2000s, four submarines, Ohio , Michigan , Florida , and Georgia (collectively, OMFG ) were declared redundant as a result of the Strategic Arms Reduction Talks (START) II treaty with Russia. Rather than retire the ships, the Navy instead chose to convert them to guided-missile submarines. Each can carry a staggering 154 Tomahawk cruise missiles, giving each more short-term firepower than an aircraft carrier. As useful as they are, the subs are at the end of their service lives and all four will retire by 2028. Once the Columbia production run is finished, the Navy will order four new guided-missile subs, likely based on the Columbia hull, entering service in 2045.

As for attack submarines, the Navy plans to continue building Virginia -class submarines for several more decades, keeping up the steady pattern of upgrades to keep them on the cutting edge. After two more Block IV submarines, the service will receive its first Block V sub. The Block Vs will be 70 feet longer, to accommodate payload modules designed to carry up to 28 Tomahawk cruise missiles, for a total ship load-out of 40 Tomahawks per boat. The Block Vs will also be able to carry the Navy’s new Conventional Prompt Strike hypersonic missiles instead of Tomahawks. A Block VI class is anticipated but its feature set is to be determined.

A replacement for the Virginia class, SSN(X) , is projected to enter service in 2041.

The Navy’s submarine fleet might well be the most important factor deterring China, Russia, and other like-minded nations from starting a war. As America’s submarine force grows, the options available to its adversaries shrinks, until the option of victory becomes vanishingly small. Building this fleet is no longer an industrial enterprise, it’s a geopolitical race that the Navy—and America—can’t afford to lose.

Kyle Mizokami is a writer on defense and security issues and has been at Popular Mechanics since 2015. If it involves explosions or projectiles, he's generally in favor of it. Kyle’s articles have appeared at The Daily Beast, U.S. Naval Institute News, The Diplomat, Foreign Policy, Combat Aircraft Monthly, VICE News , and others. He lives in San Francisco.

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