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7 Eco-Conscious Yachts That Are Changing the Future of Boating, From Zero-Carbon Catamarans to Hybrids

Pure-electric trawlers and hydrogen-powered sailing vessels sound like sci fi, but they'll be on the water soon..

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Black Pearl is an eco-conscious sailing vessel signaling a new trend in yachting.

Yachting and sustainability may sound like a paradox, but we’re steadily seeing the marine world embrace eco-change. For the yachting world, there are an increasing number of ways to boat with a lower carbon imprint. From electric-diesel hybrids to zero-carbon catamarans powered by alternative fuel sources, here is a closer look at the newest eco-conscious yachts on the water—as well as several concepts that will be on the market in the next year, and a sailing vessel that helped start the emissions-reduction trend among superyachts.

Azimut Seadeck

green ocean yachts

Having the world’s largest yacht builder embrace sustainability promises to exert pressure on hundreds of smaller builders around the world. When the three-model Azimut Seadeck  series is launched, the combination of complementary emissions-reducing technologies promises to be a major milestone for yachting.

“This is the most efficient yacht ever designed by Azimut,” said Federico Lantero, head of Product Design at Azimut/Benetti, at an event announcing the series. “We’ve identified the most recent technologies over the years, so we sat together said let’s raise the bar once again. Let’s push these technologies to the limits. It’s been like assembling a big puzzle.”

The Italian shipyard promises above-average efficiency at a wide range of speeds: The official estimates predict an emission reduction of 40 percent, thanks to Seadeck’s diesel-electric hybrid systems, lightweight carbon-fiber superstructure, solar panels, and other energy-absorption solutions.

Monaco-based designer Alberto Mancini, who penned the exterior, teamed up with other Italian designers Matteo Thun and Antonio Rodriguez, who completed the sleek interior design. Thun and Rodriquez infused the interior with the newest sustainable materials, including cork, which they describe as the “best alternative to teak.”

The concept of Seadeck’s large open aft section—dubbed “Fun Island,” follows the success of the extended deck of sister builder’s Benetti Oasis. That design was a game-changer in its wellness-outdoor living approach. Azimut will release the Seadeck models in the next 20 months, starting with the Seadeck 6 in early 2024.

Alva Yachts Ocean Eco 90 H2

green ocean yachts

In the past couple of years, German catamaran and sailboat builder Alva Yachts has turned heads with its innovative solar catamarans.  But now it’s pushing boundaries farther with the announcement of what it’s calling “the first zero-emissions superyacht catamaran to run without fossil fuels.”

The Ocean Eco 90 H2 is a special 90-foot version of the Ocean Eco 90 series, the shipyard’s flagship model. It comes in two versions: full electric and hybrid diesel-electric. The new model is the company’s first venture into hydrogen. Dubbed a “fuel-less superyacht catamaran with wings,” the H2 was requested by an existing Alva owner. It is powered only by sustainable sources, including the sun, wind, electric energy, and hydrogen fuel cells. The company’s signature solar cells generate up to 40kWp of power while twin performance electric motors give power, with the aid of the Ayro Oceanwings wind-propulsion system.

Oceanco ‘Black Pearl’

green ocean yachts

The world’s biggest sailing superyacht— Black Pearl —is also the most sustainable boat on water. Energy is saved at every turn on board the 350-foot yacht, from the HVAC system to three carbon-fiber masts, striking black DynaRig sails and aluminum superstructure that combine to make the Oceanco yacht lightweight and efficient. Controllable pitch propellers feed power back into the yacht via a pair of shaft generators providing enough power to support the yacht’s hotel load. Equipped with battery banks and a waste-heat recovery system, the gigayacht is capable of sailing across the Atlantic using only renewable energy.

Sunreef 80 Eco Marie-Joseph

green ocean yachts

Formula One champion Fernando Alonso so enjoyed his Greek charter aboard the Sunreef 80 Eco Marie-Joseph last summer that he now has a Sunreef 60 Eco in build. Equipped with electric engines, Marie-Joseph is fitted with nearly 1,800 square feet of solar panels integrated into the yacht’s composite structures, including the mast, boom, superstructure and hull sides. It’s enough to generate up to 45.5kWh, which leaves the deck areas free for guest enjoyment. In addition to the yacht’s “solar skin,” the vessel also has a hydro-generation system, which recovers energy from the propellers as well as high-efficiency batteries.

Steeler 61S Electric

green ocean yachts

Designed by Vripack and built by Steeler, the 61-foot Steeler 61S Electric is a full custom electric trawler built for a liveaboard owner. Sustainable materials, such as steel, wood, leather and Flexiteek decking, give a nod to the owner’s determination to have a lighter carbon footprint—though the biggest sustainability breakthrough lies with the boat’s propulsion and slow-boating efficiency. Though equipped to run a 75kW diesel generator, the Steeler 61S Electric is also equipped with a 90kW electric motor and can run on shore power. In true Dutch style, solar panels and windmills mounted on the roof help feed the 184kWh battery pack.

Newcastle Marine ‘Safira’

green ocean yachts

When it comes to sustainability, every little bit helps. Powered by azipod drives, which provide 20 percent more efficiency than conventional shafts, the 129-foot Safira can also run on 15-percent biodiesel. The boat is fitted with LED lighting and good insulation, which allows for smaller generators and reduced fuel consumption. Environmental considerations extend to the choice of materials as well, with reclaimed oak, remnant stone and Esthec—a synthetic replacement for teak—being used for both cabinetry and exterior decks.

Rossinavi ‘No Stress’

green ocean yachts

Italian designer Enrico Gobbi’s latest project comes in the form of Rossinavi’s first hybrid yacht. Delivered earlier this month, the 169-foot, full-aluminum sports yacht, No Stress , is powered by two MTU 16V diesel engines and two electric motors. In electric mode, the dual power system is managed by an artificial intelligence (AI) system that monitors fuel consumption. No Stress forms part of the Italian shipyard’s aim to develop boats with BluE technology. In addition to more environmentally-friendly cruising, the inclusion of AI means the owners “can enjoy the electric experience on board to the fullest,” said Rossinavi’s COO Federico Rossi, in a statement.

The Italian yard recently launched another hybrid-electric “BluE” concept called Infinity , a sailing yacht with an exterior by Fulvio de Simoni. The 138-footer has solar panels that can be stored so that yacht can navigate in full-electric mode for 90 percent of an average day. De Simoni also penned Rossinavi’s Sea Cat hybrid cat, which is currently under construction.

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Greenline yachts guide

Greenline Yachts: The Complete Guide to Greenline Yachts

green ocean yachts

Last Updated on April 14, 2022 by Boatsetter Team

Green by name, green by nature.

A relatively new entry to the boating industry, Greenline Yachts has revolutionized yachting with a range of innovative and environmentally friendly features. This is boating that does not cost the earth.

The History of Greenline Yachts

Greenline Yachts was launched in 2008. As all great ideas do, they began life on the drawing board. Greenline yachts became a bestseller just one year later, selling more than 550 units of their Greenline 33 in over 28 countries. Its dedicated team of engineers and designers had built a safe, comfortable, and elegant boat.

But it did not stop there. In 2010, just two years after their launch, Greenline’s maiden production, the Greenline 33, became an international bestseller. New boats followed rapidly in 2011, 2013, 2016.

In 2019, the Greenline 48 Coupe premiered in Dusseldorf, Germany, where it amazed onlookers. Since then, the company has grown and continued to innovate, inspire and raise the bar. Who knows what the future holds for this firebrand?

The features of a Greenline Yacht.

Innovation. Innovation. Innovation. Ever since their introduction of the first-ever hybrid boat, which combined diesel and electricity, in 2008, Greenline has revolutionized the boating industry. They have set the bar as a pioneering, forward -thinking, and game-changing boatbuilder. Their vision is to shape the future of boating into environmentally sustainable and, in doing so, establish themselves as the most responsible boat brand in the world.

The designers at Greenline know that their customers want to be at one with the ocean. They want to plunge themselves into the big blue, explore it, conquer it, all without leaving a trace, preserving it for future generations to enjoy too. With their expansive range of hybrid and fully electric boats , this dream is made a reality.

Each model is powered by renewable sources of energy and fitted with solar panels, so it won’t be only the passengers who are soaking up the rays! Greenline yachts use organic boat wash and biodegradable rubbish bags, as well as being built of eco-friendly fabrics, such as PET foam core, grass paper, and recycled materials.

But this is at no sacrifice to speed or performance. Greenline Yachts boasts a range of innovative technological features that will ensure you stay top of the pack. Greenline Yachts are the only range of yachts currently in production that offers H-Drive as well as E-Drive; they have built-in vacuum infusion technology. In contrast to conventional yachts, this means that their boats have optimal weight and robustness, higher quality of material, alongside being kind to the environment.  

Low centers of gravity ensure that the utmost levels of safety and comfort are maintained on and below the deck . This comes from Greenline’s technical mastery in placing all the heavy components of the boat in the deepest part of the hull , which renders the vessel more impervious to rolling and increases stability – even in the choppiest of waters!

Of course, all Greenline models are built to a highly sophisticated level. They harness the best of modern technology, especially in tooling and prototyping, and the inherited wisdom of the past in handcrafting to build arguably some of the world’s most advanced boats. Tradition and experience blended seamlessly with the cutting-edge and futuristic.

The Greenline Range

Here at  Boatsetter , we are proud to offer a range of Greenline Yachts for rental. In fact, they are a key part of our  new ecological and green  boating rentals.

Despite its age, Greenline Yachts flaunts an impressive product range in the world, with nearly 8 models currently on the waves (although more are in the pipeline). There is the entry-level Greenline 33 Flybridge series up to the 68 OC. The 33, 39, 40, 45 Coupe, 45 Fly, 48 Coupe, 48 Fly, and the 68 OC.

Thanks to Boatsetter’s  peer-to-peer  boat renting service, sampling one of these beauties has never been easier. Rentals typically come with a knowledgeable captain and crew to guide you on an exciting yacht charter adventure. Boatsetter has Greenline Yachts which are available from multiple sites across the United States, Europe, and beyond. Many of Boatsetter’s rentals offer the opportunity to enhance your experience with jet skis, electronic surfboards, and sea bobs. Time to hit the waves.   

The Greenline 33   

Where it all began.

 Measuring in at 32’9″ (9.99m), the Greenline 33 is a splendid yacht containing 1 salon (plus an optional bunk ), 7 berths and 1 bathroom. It has a fuel capacity of 132 gal (500L) and can hold 80 gal of freshwater (300L).

The Greenline 33 has a hybrid and electric drive and conventional diesel options, true to their pioneering spirit. Its Volvo Penta D3 can deliver speeds of up to 11 knots and 170 HP. Their decade of experience in hybrid engines means that this is the ideal system for performance and efficiency while ensuring that your passengers remain comfortable on the deck.

A signature feature of the Greenline 33 is its Aft Galley , which combines the cockpit and galley into a fabulous and inviting social area. There is no single step between the bathing platform and the helmsman position to ensure one level of living throughout the boat.

And with 360-degree panoramic views from the inside, natural light will delight your senses!

The Greenline 39

The big brother of the 33, the Greenline 39 is beefy with a beam of 12’4″ and accommodation for up to six people. Friends, family or business colleagues, you name it, you can bring them. Wishing to lavish your passengers in comfort and grace, the designers at Greenline have fitted the 39 with a bank of solar panels, which you can use for all the boat’s appliances, whether you are at sea or having a drink at the port . Even better, this means that the boat does not make a sound. No noise. No vibrations. No emissions. No disturbances. Nothing. Just you …

And the seagulls.

The 39 has high-performance LiPo Batteries 2 x 13.3 kWh in its hybrid edition, which have a charging rate of 8 kWh/day. Depending on your energy management and the weather conditions, this translates as 2 days on anchor, while using the full range of appliances that a family needs, including laptops, TVs, fridge and stove. Still, the non-hybrid is built with efficiency in mind. It consumes approximately 6.5 kWh/day for 4 people in a 24 hour period.

Looking at the exterior of the yacht, the cockpit and side decks are sheltered to afford your passengers maximum security and protection so that people of all ages and abilities can enjoy the weather. Plus, the Helmstand side door provides safe maneuvering throughout the boat.

The Greenline 40

The family favorite.

Biggest of all, the series provides the perfect venue for you to sit back with your family and enjoy. No work. No-fuss. Just sheer relaxation and comfort. With 2 cabins, a large salon, and a maximum of 6 berths, the Green 40 can cater to families of all shapes and sizes. And with a fuel capacity of 185 gal (700L) and water tank of 106 400L, there is no need to worry about running dry.

The Greenline 40 enjoys all of the Green technologies that makes Greenline so, well, green. It has 4 high performance LiPo batteries that allow the whole family to stay connected and entertained for 3 days on anchor. For those with more restrained usage, this can be more. Nonetheless, available as a diesel, electric or hybrid drive. This is a boat with green credentials.

For when the sun is dipping below the waves and it is time to relax, the Greenline 40 has an adaptive owners cabin , which supports a multiplicity of sleeping arrangements.

The Greenline 45 Coupe

Say hello to the ocean’s solar power plant.

Available as a Diesel Drive, Hybrid Drive or Electric Drive, the Greenline 45 can accommodate up to eight people with 2 or 3 spacious cabins, depending on customisation, and has two bathrooms. One of these cabins – yes, you guessed it, the master cabin – is full beam, meaning it is nearly 5 metres wide. What a treat. Its diesel tank has a large capacity of 396 gal (1,450L) and 159 gal (600) of freshwater, besides plenty of black water for whatever your needs.

Get ready to impress your guests with the homely natural wood table in the salon, and walk-in closet, and walk-in wardrobe for both cabins. Let the fashion shows commence.

But the Greenline 45 Coupe does not stop there. Like the previous models, it has EDrive technology. Built-in partnership with Torqeedo, this revolutionary technology provides silent, emission free propulsion along the waves, and integrated energy manages to run the boat’s domestic supply efficiently and ecologically. This is complemented by SIMRAD Navigation Electronics , complete with an extra-large navigation dashboard for your viewing pleasure. 

Enough of the tech stuff. There is also a hydraulic bathing platform which can be raised or lowered to ensure easy, safe access to the waves.

The Greenline 48 Fly

Independence at its finest

On the outside this boat is unmistakable. It will turn heads at the port. Thanks to its smartly designed covered sidewalks, the flybridge on the yacht is extra-large. It is wider than most of the other boats in its class. =

Greenline knows that a holiday should be relaxation par excellence. This is why they have developed extra wide and protected side passages, with side doors that aid speedy jumping on and off the ship, and an extra protective hardtop option that is enriched with additional solar panels. While the traditional side anchor is standard, Green also offers the option for a boat anchor.

Full-sized freezer? Check. Wine cooler? Check. Extra-large owner bed? Check. The convertible salon of the Greenline 48 Fly, with an adjustable table, offers the opportunity to transform the main dining area into extra berths for when your guests want to hit the hay.

Below deck, the Greenline 48 Fly has 2 x Yanmar 8LV320 engines that generate speeds up to 20 knots and have 320 HP each. This will allow you to cruise at the perfect pace. There are 3, optionally 4, cabins and a maximum of 6 berths, 2 in the salon, and another. Besides, there are 3 bathrooms.

Still curious? Watch the renowned yachting critic  Boat Test  try one out.

The Greenline 68 Ocean Class

The extraordinary just got even more extraordinary.

The biggest yacht ever made by Greenline, the 68 Ocean Class is a force to be reckoned with. This yacht demonstrated to the world that the shipyard was knocking its boat, building up a gear. Read the  reviews  here!

If you want luxury, that remains environmentally sound, then look no further than the flagship of the Greenline Yachts family: the 68 Ocean Class. 

Taking the open-plan to the next level, the world-class yacht has Greenline’s signature Aft Galley, which combines the cockpit and galley in a magnificent space for socializing. During the daytime, the whole interior of the boat is flooded with natural light due to the 360-degree panoramic windows. And for when the sunsets (or is high in the sky), there is an expansive wine cooler in which you can stow away your favorite bottle – or two.

Alongside providing extra protection to the craft, the 68 Ocean Class has a hardtop on the flybridge, which coincidentally creates an excellent diving platform. Ready to impress your crush? Just make sure that the water is deep enough.

68′ 3″ in length and with a 17′ 11″ beam, this behemoth will dominate any port or harbor. Or, if you fancy getting away from it all, the boat would be the perfect companion for you to visit your favorite coastline. Italy, Miami , or the Bahamas – you decide. 

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The Promises and Pitfalls of an All-Electric Yacht

  • By Tim Murphy
  • Updated: November 8, 2021

Arcona 435Z

This past October, I saw one of the most interesting exhibits in more than 500 new cruising sailboats I’ve reviewed over two decades. It was the Arcona 435Z, built in Sweden and introduced by Graham Balch of Green Yachts in San Francisco. Balch describes his business as “a new brokerage dedicated to the electric revolution on the water,” and it was the “Z” in the boat’s name, which stands for “zero emissions,” that made this boat so interesting. This was the first electric propulsion system—not hybrid but all-electric —I’d ever seen on a cruising sailboat.

Electric propulsion isn’t new. Since 1879, electric motors have propelled boats; a fleet of some four-dozen electric launches transported visitors around the 1893 Colombian Exposition in Chicago. But cruising sailboats are not launches, and the open sea is not a protected canal. When we’re using cruising boats as they’re meant to be used, they seldom end their day plugged into a shore-power outlet. Cruising boats comprise many devices —stove, refrigerator, freezer, windlass, winches, autopilot, radar, lights—whose power typically comes from a tank of fossil fuel. And today’s cruising sailors are accustomed to using diesel auxiliary power to motor through lulls or punch into headwinds and seas.

Starting about 15 years ago, we saw a wave of diesel-electric and hybrid propulsion systems on production and custom cruising boats ( see “Perpetuated Motion,” CW , March 2005 ). Both of those systems ultimately start with an onboard internal-combustion engine. A diesel-electric propulsion system relies on a running genset to directly power the electric motor that turns the propeller. A hybrid system relies on batteries to power the electric motor, plus an internal-combustion genset to recharge the batteries. One of the promises of a hybrid system is the ability to regenerate electrical power. Regeneration means using boatspeed under sail to turn the propeller, whose spinning shaft sends electrons from the electric motor back through an electronic controller to recharge the batteries. In such a system, the boat’s propeller is both an electrical load (when running under power) and a charging source (when sailing in regeneration mode).

The Arcona 435Z was different from both of these systems: It incorporates no onboard fossil-fuel engine at all. Instead, it has a bank of lithium batteries, several solar panels, and a proprietary propulsion leg that looks like a saildrive. “This boat,” Balch said, “has the very first production unit in the world of Oceanvolt’s newest electric propulsion system, called the ServoProp.”

lithium-ion batteries

For our sea trial, Balch was joined by Derek Rupe, CEO of Oceanvolt USA. “If you can sail the boat and you have some solar, you can go anywhere in the world, and you can make all your power underway while you go,” Rupe said. When we spoke in October 2020, he touted three high-profile sailors who were using the Oceanvolt electric propulsion system: Alex Thomson, for his Hugo Boss Open 60 Vendée Globe program; Jimmy Cornell, for his Elcano 500 expedition; and Riley Whitelum and Elayna Carausu, who had been teasing their new boat for months on their popular Sailing La Vagabonde YouTube channel.

The efficiency of Oceanvolt’s ServoProp and the regeneration from it is the promised game-changer in each of these boats. The ServoProp is a leg with a ­feathering propeller that can be set for optimal pitch in three modes: forward, reverse and regeneration.

“You don’t need fuel,” Rupe said. “You don’t need to dock; you can go anywhere you want to go and always have the power for living and propulsion.”

That’s the promise. But are there also pitfalls?

Innovation and Risk

Marine electric propulsion is an emerging technology. Compared with the mature and settled technology of diesel engines and lead-acid batteries, electric-propulsion systems—with their electronic controllers and lithium batteries—are in a stage of development best described as adolescent. Every sailor has his or her own tolerance for technical innovation. For the promise of fewer ­seconds per mile, grand-prix-racing sailors willingly trade a high risk of expensive damage to the sails, rig or the boat’s structure itself; cruising sailors, by contrast, tend to favor yearslong reliability in their equipment as they seek miles per day.

Folks who identify as early adopters take special joy in the first-wave discoveries of a new technology; if they’re clear-eyed about supporting an ongoing experiment, they see themselves as partners with the developers, accepting failures as opportunities for learning. Sailors motivated primarily by changing the trajectory of climate change might be especially willing to modify their behavior to limit their own output of greenhouse gases. Investing in any emerging technology asks you to start with a clear assessment of your own risk tolerance. We’ll return to this theme with one or two real-life examples.

Oceanvolt system

The American Boat and Yacht Council, founded in 1954, sets recommended standards for systems installed on recreational boats. For decades, ABYC has published standards related to installations of diesel and gasoline engines, as well as electrical systems based around lead-acid batteries. By contrast, it was only three years ago that ABYC came out with its first electric-propulsion standard (revised July 2021). And only last year it published its first technical-information report on lithium batteries (a technical-information report is an early step toward a future standard). The takeaway is that if you need help servicing your diesel engine or electrical system built around lead-acid batteries, you can pull into any reasonable-size port and find competent technicians to help you. With electric propulsion and lithium batteries, that pool of skilled talent is significantly scarcer.

ServoProps

To say that a technology is mature simply means that we’ve learned to live with it, warts and all, but that it holds few remaining surprises. Certainly, diesel-propulsion and lead-acid-battery technologies each leave plenty of room for improvement. When a charge of fuel ignites in the combustion ­chamber of a diesel engine, some three-quarters of the energy is lost in heat and the mechanical inefficiencies of converting reciprocating motion to rotation. Lead-acid batteries become damaged if we routinely discharge more than half of their capacity. During charging, they’re slow to take the electrons we could deliver.

Lithium batteries are comparatively full of promise. Their power density is far greater than that of lead-acid batteries, meaning they’re much lighter for a given capacity. They’re capable of being deeply discharged, which means you can use far more of the bank’s capacity, not merely the first half. And they accept a charge much more quickly; compare that to several hours a day running an engine to keep the beers iced down.

Oceanvolt motor controllers

But the pitfalls? Let’s start with ABYC TE-13, Lithium Ion Batteries. Some of its language is bracing. “Lithium ion batteries are unlike lead-acid batteries in two important respects,” the report says. “1) The electrolyte within most lithium ion batteries is flammable. 2) Under certain fault conditions, lithium ion batteries can enter a condition known as thermal runaway, which results in rapid internal heating. Once initiated, it is a self-perpetuating and exothermic reaction that can be difficult to halt.”

Thermal runaway? Difficult to halt? Self-perpetuating?

“Typically, the best approach is to remove heat as fast as possible, which is most effectively done by flooding the battery with water,” TE-13 continues, “although this may have serious consequences for the boat’s electrical systems, machinery, buoyancy, etc.”

If you were following the news in January 2013, you might remember the ­story of Japan Airlines Flight 008. Shortly after landing at Boston’s Logan Airport, a mechanic opened the aft ­electronic equipment bay of the Boeing 787-8 to find smoke and flames billowing from the auxiliary-power unit. The fire extinguisher he used didn’t put out the flames. Eventually Boston firefighters put out the fire with Halotron, but when removing the still-hissing batteries from the plane, one of the ­firefighters was burned through his ­professional protective gear.

Victron Energy Quattro

Samsung Galaxy cellphones, MacBook Pro laptops, powered skateboards—in the past decade, these and other devices have been recalled after their lithium batteries burned up. In that period, several high-end custom boats were declared a total loss following failures from lithium batteries. In March 2021, a 78-foot Norwegian hybrid-powered tour boat, built in 2019 with a 790 kW capacity battery bank, experienced thermal runaway that kept firefighters on watch for several days after the crew safely abandoned the ship.

Yes, experts are learning a lot about how to mitigate the risks around lithium batteries. But we’re still on the learning curve.

ABYC’s TE-13 “System Design” section starts, “All lithium-ion battery ­systems should have a battery ­management system (BMS) installed to prevent damage to the battery and provide for battery shutoff if potentially dangerous conditions exist.” It defines a bank’s “safe operating envelope” according to such parameters as high- and low-voltage limits, charging and discharging temperature limits, and charging and ­discharging current limits.

Graham Balch takes these safety recommendations a step further: “To our knowledge, the BMS has to monitor at the cell level. With most batteries, the BMS monitors at the module level.” The difference? “Let’s say you have 24 cells inside the battery module, and three of them stop working. Well, the other 21 have to work harder to compensate for those three. And that’s where thermal events occur.”

Balch followed the story of the Norwegian tour boat this past spring. He believes that the battery installation in that case didn’t meet waterproofing standards: “The hypothesis is that due to water intrusion, there was reverse polarity in one or more of the cells, which is worse than cells simply not working. It means that they’re actively working against the other cells. But if the BMS is monitoring only at the module level, you wouldn’t know it.”

On the Green Yachts website, Graham lists five battery manufacturers whose BMS regimes monitor at the cell level. “If I were sailing on an electric boat, whether it be commercial or recreational, I would feel comfortable with having batteries from these five companies and no other,” he said.

The broader takeaway for today’s sailors is that lithium batteries bring their own sets of problems and solutions, which are different from those of conventional propulsion and power-supply technologies. A reasonably skilled sailor could be expected to change fuel filters or bleed a diesel engine if it shuts down in rough conditions. With lithium-ion batteries aboard, an operator needs to understand the causes and remedies of thermal runaway, and be ready to respond if the BMS shuts down the boat’s power.

Real-World Electric Cruising Boats

When we met Oceanvolt’s Derek Rupe a year ago, he and his wife had taken their all-electric boat to the Bahamas and back the previous season. Before that, he’d been installing electric-propulsion packages for six years on new Alerion 41s and other refit projects. “My real passion is on the technical side of things—installations, really getting that right. That’s half the picture. The technology is there, but it needs to be installed correctly.”

When talking to Rupe, I immediately encountered my first learning curve. I posed questions about the Oceanvolt system in amps and amp-hours; he responded in watts and kilowatt-hours. This was yet another example of the different mindset sailors of electric boats need to hold. Why? Because most cruising boats have just one or two electrical systems: DC and AC. The AC system might operate at 110 or 220 volts; the DC side might operate at 12 or 24 volts. On your own boat, that voltage is a given. From there we tend to think in terms of amps needed to power a load, and amp-hours of capacity in our battery banks. Going back to basics, the power formula tells us that power (watts) equals electrical potential (volts) times current (amps). If your boat’s electrical system is 12 volts and you know that your windlass is rated at 400 watts, it follows that the windlass is rated to draw 33 amps.

But an all-electric boat might comprise several systems at different voltages. A single battery bank might supply cabin lights at 12 volts DC; winches and windlasses at 24 volts DC; the propulsion motor at 48 volts DC; and an induction stove, microwave and television at 110 volts AC. A DC-to-DC power converter steps the voltage up or down, and an inverter changes DC to AC. Instead of translating through all those systems, the Oceanvolt monitor (and Derek Rupe) simply reports in watts coming in or going out of the bank.

“We keep all our thoughts in watts,” Rupe said. “Watts count in the AC induction. They count in the DC-to-DC converter. They count the solar in. They count the hydrogeneration in. And the ­power-management systems tracks it that way for shore-power in.

“On a boat like this, maybe I have 500 watts coming in the solar panels,” he continued. “So then I can think: ‘Well, my fridge is using 90 watts. My boat has an electric stove. When I cook a big meal, I can see that for every hour we cook, we lose about 10 to 12 minutes of our cruising range.’”

During his Bahamas cruising season, Rupe observed that on days that they were sailing, the combination of solar panels and hydroregeneration supplied all the power he and his wife needed. “When we weren’t sailing,” he said, “we found that we were losing 8 percent each day, in the difference from what the sun gave us to what we were using for the fridge, lights, charging our laptops, and all that stuff.”

Rupe’s solution? “Twice in Eleuthera and once outside Major’s, we went out and sailed laps for a couple of hours because the batteries were below 30 percent of capacity. It was good sailing, and the wind was coming over the shore, so we didn’t have any sea state. We did a couple of hot laps on nice beam reaches, and generated about 700 watts an hour.”

Of the three sailors Rupe touted in October 2020—Alex Thomson, Jimmy Cornell and the Sailing La Vagabonde couple—only Cornell can report back on his all-electric experiences with Oceanvolt. Alex Thomson ended his circumnavigation abruptly last November, just 20 days after the Vendée Globe start, when Hugo Boss collided with an object in the South Atlantic. And at press time in early fall 2021, Riley and Elayna had just recently announced the build of their new Rapido trimaran; keep an eye on their YouTube channel for more about their experiences with the Oceanvolt propulsion system.

Oceanvolt ServoProp

As for Cornell—circumnavigator, World Cruising Routes author, creator of the transoceanic rally, and veteran of some 200,000 ocean miles—he suspended his planned Elcano 500 round-the-world expedition solely because of the Oceanvolt system in his new Outremer catamaran. His Aventura Zero Logs on the Cornell Sailing website, particularly the Electric Shock article posted on December 2, 2020, are essential reading for any sailor interested in sailing an electric boat. “Sailing around the world on an electric boat with zero emissions along the route of the first circumnavigation was such a tempting opportunity to do something meaningful and in tune with our concern for protecting the environment that my family agreed I should do it,” Cornell wrote. “What this passage has shown was that in spite of all our efforts to save energy, we were unable to regenerate sufficient electricity to cover consumption and top up the batteries.”

Cornell’s experience in that article is raw, and his tone in that moment bitterly disappointed. We recommend it as essential reading—not as a final rejection of the electric-boat concept or of Oceanvolt’s system, or even as an endorsement of Cornell’s own decision that the system didn’t work. I suspect that I may have arrived at the same conclusion. Yet given the same boat in the same conditions, one imagines that a new breed of sailor—a Graham Balch or a Derek Rupe—may have responded differently to the constraints imposed by an all-electric boat, as nearly every cruising sailor today habitually responds to the inconvenient constraints of diesel engines and lead-acid batteries.

“If you bring electric winches, electric heads and an induction stove, and then sail into a high-pressure system, you’ll set yourself up for failure,” Balch said. “You have to balance your power inputs and your power outputs.

“Sailing an electric boat is a return to the tradition of sailing that the crutch of a diesel engine has gotten us away from,” he added. “Magellan’s fleet got all the way around the world, and they didn’t have a diesel engine.”

Tim Murphy is a Cruising World editor-at-large and ­longtime Boat of the Year judge.

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Green is the New Black

  • By Yachting Staff
  • Updated: April 23, 2016

1. Greenline 48

The Greenline 48 proves that hybrid technology is here to stay. Designed by Seaway, she tops out at 14.5 knots, but can hit 23 knots with optional 380-horsepower diesels. With her displacement hull, the Greenline 48 is able to cruise 25 nautical miles at 5 knots in electric mode and 1,000 nautical miles at 7 knots under diesel power.

Greenline 48

2. Horizon Vision 74

The Horizon Vision 74 is an upgrade that sports four solar panels atop the pilothouse. While those solar panels aren’t enough to power the entire yacht, they’re able to reduce generator usage and reliance on diesel during the night hours.

Horizon 74

3. Arcadia 85

The Arcadia 85 stands out with her grids of solar cells placed between low-emission glass overhead panels, which rotate with the motion of the boat. Twin 730-horsepower MAN R6 diesels allow the Arcadia 85 to hit top speeds at 16.9 knots with her motors burning at 77 gph. She’s got a theoretical range of 714 nautical miles with a 10 percent fuel reserve.

Arcadia 85

4. Dream Symphony

Currently in development, the 463-foot staysail schooner Dream Symphony uses carefully selected, tropical, renewable wood chosen by Dykstra & Partners Naval Architects. If she takes to the seas, she’ll surpass Barry Diller’s 305-foot Eos as the largest sailing yacht in the world.

Dream Symphony

Arcadia’s 55-foot Sherpa possesses double-paneled solar cells that generate 3.5 kW of power, enough to power the yacht’s electronics, A/V system, refrigeration, lights, heads and more. She also boasts a pollutant-reducing wastewater-treatment setup and an optional hybrid propulsion system that allows the yacht to cruise at 8 knots with zero emissions. Twin 43- horsepower Volvo Penta IPS600 diesels can push the Sherpa along at a 20-knot cruising speed, with a 25-knot top end.

Arcadia Yachts Sherpa

Arcadia Yacht’s Sherpa

6. suncat 46.

The SunCat 46 catamaran has motor drive and vector propulsion, two new concepts that work together simultaneously. The yacht is solar powered, so more emphasis on the throttle is needed to compensate for the lack of diesel power. The vector propulsion sideways thrust at low speed.

SunCat 46

7. Calixas 105

The Calixas 105 trideck motoryacht was designed for environmental stewardship. “One of the criteria that Montie [Twining, Calixas’ cofounder] laid out from Day One was to build the most socially responsible boat that we could,” said naval architect Gregory C. Marshall.

Calixas 105

The 129-foot Safira is propelled by Schottel Rudder Propeller Azipod drives that are reportedly 20 percent more efficient than a conventional shaft-and-rudder setup. Her 660-horsepower Caterpillar C32 Acert engines can run on 15 percent biodiesel fuel too. The Safira ‘s decks, which look like teak, are actually built with Esthec, a composite product that also provides sound insulation.

Nordlund Safari

9. Volta 55

The 188-foot Volta 55 is currently just a concept, but it is being marketed as an energy-optimizing vessel that can go an entire day without using fossil fuel. Studio Yacht Design Rotunno Brussolo brought in a team of architects, engineers and chemists together to create an eco-friendly, zero-emissions, luxury yacht. The designer says the Fuel Cell solution, powered by pressurized hydrogen cylinders combined with Azipod groups, guarantee the sustainability of the propulsion system.

Volta 55

10. Amels 188

The Amels 188 is still in the works – scheduled to be delivered in 2018 – is the first Dutch-built yacht to meet new International Maritime Organization regulations for yacht emissions, according to Amels. The 188-foot superyacht will have eco-friendly features such as a hybrid power switchboard, a gas purification system on the generators and heat-absorbing windows to reduce air-conditioning needs.

Amels 188

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Welcome to our Blog for Green Yacht Sales Our hope is to educate visitors on green boating, electric propulsion, and more...

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What it's Like to Cross the Atlantic Ocean in an Electric Sailboat

Graham Balch

It's been one month since I and other members of the Green Yachts team crossed the Atlantic Ocean in two electric sailboats, the Arcona 435Z  (Z for zero emission) and the Salona S380Z both with Oceanvolt electric propulsion systems It's worth looking back on our trip to reflect on what it was like to sail across the ocean in an electric sailboat.

On the journey, we experienced days with 30+ knot headwinds in which we were double reefed and other days in which we had winds less than 4 knots, ironically as we were passing the wind farms off the coast of England.  We had fair winds crossing the Bay of Biscay and 20-30 knots of following winds down the coast of Portugal.  From the Canary Islands to Bermuda we mostly had gentle 10-20 knot following winds, though we did get a bit of a scare at the end as Hurricane Paulette doubled in speed and changed direction to come right towards us though we made landfall in plenty of time.

At first, in the North Sea after leaving Sweden on the Arcona 435Z, we used the electric propulsion more than we needed as we augmented our speed while sailing.  After a few days, our battery bank was down to 20%.  Then, we started relying on the sails...as sailors.  At first, I felt like we had to and I was frustrated as we sailed along at four knots.  But, what triumphed over my frustration is rediscovering within myself what it meant to be a sailor.  

For centuries, we sailors made it everywhere on the planet relying 100% on the winds.  Relying on the winds made centuries of sailors better at reading the weather, trimming sails and keeping a steady course.  Modern sailors know how to do these things, but we have stopped relying on these skills because of the diesel engine. At first on our trip, we turned off the motor because our battery bank was low and we needed to conserve power. But, as our journey continued, we found ourselves enjoying relying on our s

Salona S380Z

ails and our sailing skills. We usually entered port with 50% or more of our battery bank due to our combination of using the motor less and hydroregenerating energy back into the battery bank.  For example, we did use the electric motor on the Arcona 435Z and Salona S380Z for a long-time to get out of a dead zone of wind leaving the Canary Islands, getting down to around 20%, but through hydroregeneration, we ended up getting back up to 90% and pulling into Bermuda with over 50% charge in our battery bank.

While we had used electric boats of all types in the past, this was our first long, transatlantic journey using an electric sailboat.  We learned that an electric motor made us better sailors, reduced the maintenance and fumes one usually deals with on a journey with a diesel engine, and when one gets used to the balance of using the electric motor and regenerating through hydroregeneration and solar power, you in effect, get an unlimited range with an electric motor.  Learning how to hydroregenerate and thinking about power management became part of the art of sailing and was enjoyable thinking about how and when to use the motor and hydrogenerate, like we did when using the traveler, mainsheet, and boom vang all in combination to create a well-trimmed sail. In fact, the two went hand in hand as the better we trimmed our sails, the faster we went and the more we could hydroregenerate.

Racers of course, are familiar with relying on their sails and trimming them to get more speed- they have to in races.  But cruisers have gotten away from relying on their sails because of the diesel engine. We saw many a sailor who had their mainsail up and the engine on as they powered in a straight line, upwind (and were probably asleep as they did not respond to VHF calls from angry fisherman who had to get out of their way!).  This is not what any of us envision when we think about who are are as sailors, and I believe electric propulsion will make cruisers better sailors while still giving them the auxiliary propulsion they need to get out of dead zones and in and out of port.

The advice I would give to any sailor who is thinking about crossing the Atlantic with an electric sailboat is threefold:

  • Measure the amp requirements of all your onboard systems and change out any power hungry system.  On the Arcona 435Z we had a water-cooled refrigerator, which was a game changer as it significantly decreased the power consumption compared to a typical marine refrigerator.
  • Spend time on weekend sails sailing even when the winds are light. It is good for one's psyche and one's skills to develop their light wind sailing ability. 
  • Bring paperback books.  In line with our view that modern electric sailboats bring sailors closer to the tradition of sailing in which sailors had no need of a diesel engine to travel the world, we found we read more when we had a real book in our hands and not just a kindle. 

And lastly, if you are going to cross the Atlantic in an electric sailboat, it makes a huge difference to do it in a sailboat with three key characteristics:

  • Performance - the Arcona 435Z and Salona S380Z averaged over 8 knots sailing across the ocean, which is fast for monohull sailboat between 43 and 38 feet.  Whether it is a catamaran (that is stable and safe), a big 18+ meter monohull with a long waterline or a higher performance monohull like the whole range of Arcona and Salona sailboats, a fast sailboat is a huge plus
  • Comfort - the Arcona 435Z and the Salona S380Z were a joy to spend time on their comfortable cushions and cabins, well-laid out galley, the expansive dinette and the spacious cockpit that made outdoor lounging relaxing.  You're going to be spending a lot of time on your boat crossing the ocean and it makes a big difference if you get to cross it in a boat that is so incredibly comfortable and well-made as an Arcona or a Salona
  • Hydroregeneration - hydroregeneration is a game changer for electric propulsion and Oceanvolt's new Servoprop lineup has the best hydroregeneration capability of any electric propulsion system available on the market.  Hydroregeneration continuously adds power back into your battery bank giving you 'free' power.  If you are using an electric motor, choose one with a strong ability to hydroregenerate because it transforms your range from a few dozen miles to unlimited when used strategically

Now that we have crossed the ocean in an electric sailboat, I have been asked, do I want to cross the ocean again?  My answer is absolutely, but with two requirements:

  • Crossing the ocean in an electric sailboat was so enjoyable compared to a sailboat with a diesel engine, I would never want to cross the ocean with a diesel engine ever again (this is pretty similar to how most Tesla owner feels about the idea of going back to driving a gas car).  
  • The second requirement is personal - I missed my wife, and my next ocean crossing will be a shared one with my wonderful life partner because I want to spend the time at sea with her instead of apart.

Topics: Atlantic Ocean , Transatlantic , Electric Propulsion , Sailing

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New Greenline Hybrid Yachts are Tax Exempt in WA State! Call 206-659-0710 for details. Read More>

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Available for immediate delivery, greenline 68 ocean class (hybrid yacht).

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The most impressive yacht of the Greenline fleet. Enjoy silent, fuel-efficient cruising without compromising luxury or comfort. Call Andrew Trueblood at (206) 931-1070 today to schedule a sea trial.

Greenline 68 Price: Starting at $3,650,000

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GENERAL INQUIRIES

 greenline 68 ocean class yacht for sale, exploring new horizons in luxury hybrid yachts.

Designed by the most experienced team of engineers, and built in the most sophisticated production facilities—by the most experienced craftsmen, the Greenline 68 Ocean Class hybrid yacht is the perfect fit for the new generation of experienced yachtsmen and sailors looking for superior comfort. The Greenline 68 Ocean Class Hybrid Yacht is designed with the utmost quality for serious, satisfying cruising.

The latest yacht from the Greenline Ocean Class line personifies the prestige and luxury of yachting lifestyle. Her distinctive characteristics make her the leader in her class with her modern-yet-classy look, superb comfort and premium quality. Modern design, eco-friendly propulsion and numerous innovative features drive the Greenline 68 Ocean Class Hybrid Yacht to be the perfect choice in the 68ft. yacht range.

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Optional skipper cabin for both versions of lower deck (A and B).

Technical Specifications

  • Greenline 68 Hybrid Yacht
STANDARD DIMENSIONS
2 x C12.9 ACERT 1000 HP Engine
Length overall 20.8 m
Hull Length 18.70 m
Beam max 5.45 m
Displacement empty 28.0 T
Displacement full load 48.0 T
Cabins 3 + salon + skipper or
4 + salon + skipper
Berths 6 / 8 / 10
Toilets/washrooms 3
Fuel Capacity 5,000 L
Water capacity 1,000 L
Maximum speed at 1/3 load 25 kts
EXTERIOR
Underwater lights at transom
Icemaker on flybridge
Electric grill on flybridge
Teak on sidewalks, bow area and the flybridge, cockpit and platform
Four hull glazing windows opening
Hydraulically operated lifting stern platform 300 kg lifting capacity
T-top on flybridge
Canvas package: exposed upholstery, items on flybridge & front windows
Sun lounging cushion with upholstered seat and removable table on Bow area
Anchor windlass 24 V with brake and stainless steel protection
Chain wash down in the lower bow anchor chain storage, fresh water, with hose
2 electric capstans aft for handling of aft mooring lines with foot controls
Telescopic electro-hydraulic gangway with teak finish, 2.5 m length
High quality silvertex exterior upholstery on bow, cockpit and flybridge
Fenders, mooring lines and boat hook
INTERIOR
Dishwasher 60 cm
Washing/drying machine
Premium entertainment system in saloon, cockpit and flybridge
Fixed 32" LED LCD TV in master's cabin
Fixed 32" LED LCD TV in forward cabin
TV satellite antenna
Venetian blinds
Vacuum flush toilets
SYSTEMS
Stablilzers, working also at zero speed
25 kW Generator
Stern thruster hydraulic
Soft couplings for 2 x C12.9 engine, including soft mounts
Instrument package Raymarine 2xGS165 inside, 2xES127 flybridge, autopilot, radar, VHF, AIS
5000 W, 24 V to 220 V inverter
Desalinator 150 l/h
Transport to Portoroz Antifouling, launch and full commissioning
Service battery bank (800 ah AGM)
Double Racor filters with alarm, water separator and bypass valve for each engine

The Future is Here - Environmentally Responsible Hybrid System

Greenline developed the world’s first hybrid yacht. And with silent, zero-emission cruising, some may say they perfected it, too. Greenline was the first hybrid yacht and offers silent and emission-less cruising. The future is here!

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Features - Greenline 68 Hybrid Yacht

Hardtop for flybridge.

The flybridge has extra shelter with a hardtop, providing protection from sun and rain.

Helmstand Side Door

The Helmstand side door allows for quick and safe movement throughout the boat.

Flybridge Aft Barbecue

Enjoy meals from the aft barbecue on the flybridge.

The cockpit and galley become a large social area with the aft galley, one of Greenline’s signature features.

Natural Lighting

There is an abundance of natural light due to the 360˚ panoramic view inside the salon.

Full Beam Owner's Cabin

The owner's cabin sits at full width of the ship on the Ocean Class 68.

Wine Cooler Option

Choose regulated storage for your wine.

Lifting Storage

Store bar and tableware in the electric lifting storage unit.

Greenline 68 Videos

Greenline Hybrid Yacht Ocean Class 68

Greenline Oceanclass 68 First Tests

Greenline Oceanclass 68 One Weekend in Greece

Greenline OceanClass 68 - Video by BoatTEST.com

Greenline 68 Photo Gallery

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How much does a Greenline 68 Yacht cost?

The Greenline 68 Yacht starts at $3,650,000 (USD) and comes standard with solar panels, Lithium batteries, the Hybrid drive system and much more. A fully equipped boat with options delivered to Seattle will add approximately 25% to the price.

What is a Hybrid Yacht?

Simply put, a hybrid yacht can be propelled by more than one power source. A Greenline yacht in Electric Mode allows up to 40 nautical miles at approximately 4 to 6 knots on a full charge, which is more than enough for a typical leisure day on the water. Electric Mode is also ideal for trolling and sports fishing, or enjoying pristine scenery. The advantage of the hybrid drive is silent and emission-less cruising.

In Diesel Mode, the diesel engine propels the boat and drives the generator, which recharges the battery pack at normal cruising speeds of 8 to 16 knots or more. 

The yacht owner can easily switch between these modes as needed, to provide the ultimate in flexibility and control. Read More>

Where are Greenline Yachts made?

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Headquartered near the sailing mecca of Southampton, U.K., luxury yacht builder Green Marine manufactures custom performance sailing yachts and superyachts.

History of Green Marine

Luxury yacht builder Green Marine was founded in 1982 with the mission of manufacturing high-performance sailing yachts from carbon fibre and other advanced composites. The shipyard has delivered monohull and catamaran sailing yachts that have competed in a wide variety of races, including the America’s Cup and Volvo Ocean series. Over the years, luxury yacht builder Green Marine has used its expertise in advanced composite construction to produce custom luxury yacht and superyacht hulls in collaboration with noted yacht designers. These yacht hulls go on to be fitted out by other shipyards including luxury yacht builder Wally and luxury yacht builder Vitters .

Notable Green Marine Yachts

In 2012, luxury yacht builder Green Marine delivered the advanced composite hull, deck, internal structure and other components of the 42.6M sailing superyacht Sarissa to Dutch luxury yacht builder Vitters for fitting out. Sarissa was designed by naval architect Bill Tripp . Luxury yacht builder Green Marine launched the 35M sailing superyacht Sojana in 2003. Noted naval architecture firm Farr Yacht Design is credited with designing Sojana .

Specialisations of Green Marine

Luxury yacht builder Green Marine specialises in high-tech yacht construction techniques utilising carbon fibre and other advanced lightweight composites. The shipyard also manufactures luxury yacht components.

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Greenline team launches new brand gx superyachts at monaco yacht show.

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The GX42 is the newest brand to break into the superyacht category, launched at this year's Monaco ... [+] Yacht Show. This is the Coupé version, featuring a roof covered in gleaming solar panels that slide apart to reveal a sunning and Jacuzzi area.

The unveiling of a new superyacht brand doesn't come along very often, but when it does it is big news, particularly when it is on a global stage like the Monaco Yacht Show. The new superyacht brand, GX Superyachts , is the "brainchild" of the principals of Greenline Yachts , known for production of efficient hybrid yachts up to 58 feet. Greenline, headquartered in Begunje, Slovenia, began building yachts over 15 years ago, employing smart hull design, solar charging, and hybrid propulsion.

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Greenline yard owner Vladimir Zinchenko explains, "Our journey started with Greenline Yachts, where we pioneered the world's first serial production hybrid yacht over 10 meters back in 2008," continuing, "With more than 1,000 yachts delivered globally, Greenline has been at the forefront of innovation in the boating industry. Through that time, we have tried to further our vision of responsible yachting — from sourcing raw materials right through to the operation of the yacht itself."

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Arnas noted, "I am backing GX Superyachts because I admire their ambition and vision. My goal is to help the team translate their decade-long experience in hybrid recreational boat building into the highly regulated superyacht sector."

This rendering of the GX Superyachts 42 Coupé shows the view of the stern. The GX Superyachts brand ... [+] is the newest superyacht marque, bringing an entirely new look to the market.

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At the 2018 Monaco Yacht Show, a 32-foot (9.9-meter) all electric Greenline yacht found His Serene Highness Prince Albert II of Monaco, known for his keen appreciation of environmental practices, requesting an escort to the Monaco Yacht Club in the boat. That scenario sparked the idea to expand the Greenline models to include superyachts. The result brought GX Superyachts to fruition at this year's 2024 show.

Sustainable Capabilities And Solid Range

"Each yacht in our GX Superyacht range is equipped with our innovative hybrid propulsion system, allowing for both efficient electric cruising and powerful diesel performance when needed," Luca Raumland, Chief Commercial Officer, commented. He further stated that at 6 knots in electric mode, these yachts have a 100 nautical mile range, extending to 11,571 nautical miles at 6 knots. The yachts can make trans-Atlantic crossings at 12 knots.

Comparisons to conventional yachts show that the GX range will emit less than 40 percent in comparable carbon emissions. Designed with a large solar array and lithium battery bank, the yacht can sit silently at anchor for over 48 hours, running full hotel systems including air conditioning without requiring help from a generator. That also translates to noiseless, vibration-free, odor-free operation that finds increasing appeal with superyacht owners.

The GX RPH flybridge is the latest marque to enter the superyacht scene, with brand launch recently ... [+] at the Monaco Yacht Show.

GX42 In Build

Already well underway with the keel laying ceremony on June 1, 2024, the first GX 42 will go to a customer that came through the Greenline network. Specializing in composite construction up to 78 feet (24 meters) in the Slovenian shipyard, the GX team needed to select a new build partner experienced in building larger aluminum yachts. They signed with SES Yachts in Tuzla, Türkiye, a custom aluminum yacht expert.

According to Elif Yildirim, Managing Partner of SES, "We embrace custom and semi-custom projects, and the new GX Superyachts range plays perfectly to the skills we have in house." Yildirim also emphasized the importance of being a family-owned business focused on sustainability, acknowledging that collaboration has been very smooth on this first build, looking toward a future with GX and many more yachts.

The Importance of Design

The GX Superyachts GX42 RPH has an expansive aft beach club deck, designed by Marco Casali of Too ... [+] Design.

Described as "achingly sleek exterior lines," the GX Superyachts sport lines from Marco Casali, displaying an efficient, low-profile superstructure allowing large interior volume. Two variations of the model, the Coupé and the RPH, are available.

The Coupé sports a long, curved superstructure. The roof is covered in gleaming solar panels which slide apart to reveal a hidden sun deck with jacuzzi and bar. The RPH version is designed with a large flybridge in clean, modern aesthetics, with 353 GT volume. Both versions offer guests an expansive beach club with fold-down wings and hydraulic step platform.

For the interiors, Casali continues the chic simplicity of the exteriors, styling the first GX42 with impressive bath fixtures from Antonio Lupi and porcelainware from Dornbracht. Loose furnishings from Poltrona Frau and Rugiano are complemented by Foglizzo leathers and Cadorin natural wood flooring.

Casali, founder of Too Design, commented, "Our studio has long worked with Greenline Yachts, so we understood exactly what the new GX Superyachts brief required. "I am proud of the way we have reinterpreted the timeless looks of the smaller yachts to give soul and purpose to the lines of the new superyachts."

The latest superyacht brand, GX Superyachts, will be built in two versions: a Coupé and an RPH. Both ... [+] will be sustainable, have long range, and enjoy suitable luxury superyacht amenities.

Technical Talent

Underwater hull lines maximizing stability and speed potential from Francesco Rogantin of NAMES Studio proves an important element in achieving the long range of the GX Superyachts with respectable speed. Rogantin said, "The challenge was to analyze the different operational scenarios and ensure that the hull and appendages performed to their best for each one."

Delivery Schedule

On track for a summer 2026 delivery, the first GX42 will put the exclamation point on this new superyacht brand. To learn more about GX Superyachts head to the website , or stop by the stand at the Monaco Show, QA1 Quai Antione IER.

Kathleen Turner

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We designed an elegant catamaran with a flat bed for a caravan to roll on to. Once in position the caravan is secured on the centre of the ramp and the deck is closed off with an adjustable walk around. The design ensures maximum stability by locating the main buoyancy at the maximum width.

The caravan boat is fitted with a roof that has a natural canvas look, providing shade and protection. The roof is supported on telescopic poles to provide space when the caravan is placed on board. The roof is lifted while the caravan rolls on or off and lowered when the caravan is in position, protecting the caravan and the walk around against the weather. The deck is surrounded by a 75 cm high canvas covered stainless railing. A windowscreen protects the steering position. The enclosure is designed to provide maximum safety on board, especially with young children in mind.

The central ramp is fitted with two telescopic aluminium perforated ramps of 2 meter length to allow easy embarking. At the bow of the boat there is a comfortable steering position with a clever steering console that can be placed in all positions. The steering position adapts to accommodate various lengths of caravans from 4.70 meter up to 6 meter length.
A spacious walk around of 1.20 m surrounds the boat and the aft of the boat has a comfortable platform where the two outboard engines are fixed. The transoms have small swimming platforms with a swimming ladder.

Inside the catamaran hull there is a fuel tank holder, a wastewater tank and a battery case . The caravan boat is made out of reinforced fiberglass with a galvanized steel centre ramp with aluminium telescopic ramp plates. A big fender rope mounted all around the hull, 10 cm above the waterline for maximum protection. A rubber rubrail prevents any damages.

We can imagine a host of new recreational experiences using the caravan boat. It could make camping sites near the waterfront even more attractive, offering their clients not only a beautiful place for land based recreation but also a few days cruising on the water. The caravan boat can also be used on its own as a party boat or as starting boat for sail races or as a catering boat. Or even as a small transport boat.

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    We designed an elegant catamaran with a flat bed for the caravan to roll on. Once in position on the boat it is secured on the centre of the pontoon, which can then be closed off with an adjustable walk around. The design ensures maximum stability by locating the main buoyancy at the maximum width. We are inviting your ideas and suggestions.

  4. The 7 Most Sustainable Yachts on the Water Now

    The Ocean Eco 90 H2 is a special 90-foot version of the Ocean Eco 90 series, the shipyard's flagship model. It comes in two versions: full electric and hybrid diesel-electric. The new model is ...

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    Imported into the US ­market by Green Marine, the Swedish-built Arcona 435Z is a rarity: an all-­electric cruising sailboat. Jon Whittle. This past October, I saw one of the most interesting exhibits in more than 500 new cruising sailboats I've reviewed over two decades. It was the Arcona 435Z, built in Sweden and introduced by Graham Balch of Green Yachts in San Francisco.

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    Ten eco-friendly yacht options to reduce your carbon footprint while on the water. By Yachting Staff. Updated: April 23, 2016. 1. Greenline 48. The Greenline 48 proves that hybrid technology is here to stay. Designed by Seaway, she tops out at 14.5 knots, but can hit 23 knots with optional 380-horsepower diesels.

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    It's been one month since I and other members of the Green Yachts team crossed the Atlantic Ocean in two electric sailboats, the Arcona 435Z (Z for zero emission) and the Salona S380Z both with Oceanvolt electric propulsion systems It's worth looking back on our trip to reflect on what it was like to sail across the ocean in an electric sailboat.. On the journey, we experienced days with 30 ...

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  20. CARAVANBOAT

    The caravan boat is fitted with a roof that has a natural canvas look, providing shade and protection. The roof is supported on telescopic poles to provide space when the caravan is placed on board. The roof is lifted while the caravan rolls on or off and lowered when the caravan is in position, protecting the caravan and the walk around ...

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