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Lagoon Teams Up with Uvoji for Purified Water

We are all looking to reduce the amount of plastic we use, whether it’s those disposable coffee cups or reducing our use of plastic bottles and containers.

Lagoon is doing their bit to help customers achieve the latter with a new partnership with Uvoji, a leader in water purification systems (UVC LED). There will be no need to store water bottle packs on board a Lagoon. Travel with peace of mind and enjoy healthy water straight from the tap, for all everyday uses!

This partnership is one part of Lagoon and the Beneteau Group’s ambitious environmental strategy.

The partnership covers all future Lagoon catamarans from 40 to 78 feet, which will be fitted with the innovative
Oji Nautic water treatment system as standard.

Lagoon chose Uvoji to equip its catamaran fleet thanks to their LED UV-C technology, Oji Nautic. The aim is to phase out the use of plastic bottles on board, promoting plastic waste redcution and preserving the environment.

Thomas GAILLY, Director of the Lagoon brand, said: “The UVOJI solution allows our owners to take to the sea without piling up numerous plastic bottles on board, while enjoying pure water throughout their voyage. A great step forward in the field of eco-yachting”.

How Does Uvoji Work?

Adapted for the marine environment and Lagoon’s electrical installations, the Oji Nautic water purifier uses the germicidal properties of ultraviolet light (UV) to eliminate bacteria, viruses, and contaminants from tank water, ensuring a supply of pure fresh water on board .

Ultra-compact, lightweight, and silent, Oji Nautic provides sailors with a simple, fast, and effective solution for drinking water at sea.

The unit is 16cm in height, weighs just 0.9kg and offers a maximum flow rate of eight litres per minute: a simple, fast and silent solution for drinking-water without chlorine or chemicals. The durable system is easy to operate, with low maintenance and little impact on batteries due to its low power consumption.

Thomas Zunino, the CEO of Uvoji, said “We are very pleased and proud of this 100% French partnership with the Lagoon Catamarans brand and the Beneteau Group, a world leader in eco-navigation. Our technology makes a significant contribution to preserving the environment by offering an ecological alternative to the consumption of bottled water and therefore to single-use plastic, a considerable source of ocean pollution. By offering yachtsmen the ability to consume water on board simply, safely, and efficiently wherever they are at sea, at anchor or in port, we are working alongside the Beneteau Group and SEIMI to offer a more environmentally friendly way of sailing.”

SEIMI, the exclusive distributor of Oji Nautic systems for the maritime and river transport market in France, will play a key role in the implementation of this collaboration thanks to its expertise and experience.

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Excess Catamarans Starlink Offer May 24

Enjoy a free Starlink pack with the purchase of an Excess catamaran

The Starlink Offer that Excess Catamarans were offering at the International Multihull Show in La Grande Motte has been extended and will now run through to the end of May 2024!


For sailors who want to ride the waves and surf the web!

Imagine sailing off on your greatest adventures with the ability to stay connected to the entire world. Thanks to Starlink, you can now enjoy a high-speed internet connection, even on the open ocean. Whether you want to work remotely or stay in touch with loved ones, Starlink provides a seamless Internet experience wherever you are.

Starlink is proving popular with sailors thanks to its ability to provide a fat, stable Internet connection at sea, around the world.

With a compact, easy-to-install antenna on your Excess 11 or 14, you will get a robust, reliable internet connection, even in the most remote locations with no to worry about areas without network coverage or unstable connections.

Work where you like! – the Seven Seas become your new office. Explore the planet with a high speed Internet connection to stay in touch with family and friends with all the information you will even need at your fingertips.

To take advantage of this offer, contact your Excess dealer.

For any purchase of an Excess 11 or Excess 14 until May 31st 2024. MOBILE PRIORITY subscription – 50 GB for a maximum of 3 months if you purchase an Excess 11 or Excess 14 only with the 2kVA CONVERTER [12V/220V 50HZ] compulsory option + if Excess 11 only with the STAINLESS STEEL DAVITS compulsory option and for Excess 14 only with the COMPOSITE DAVITS compulsory option.

The MOBILE PRIORITY subscription – 50GB or equivalent will be included for a maximum period of 3 months from delivery of the boat.

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Cure 55 Catamaran Build Update

The first Cure 55 catamaran (hull #1) has reached a big milestone in the build process. The cabin top is done and the Cure production team have spent the week attaching the structure to the hulls.

It’s always good to see a new build take place like this and with the cabin top windows being cut, the Cure 55 is beginning to show her lines.

Cure 55 Catamaran Taking Shape

Every part of the new Cure 55 was designed with a view to raising the bar in every area.

Her power to weight ratio means high performance but this is a design focused primarily on safety. This is a boat to cross oceans with speed and comfort.

The Cure 55 was designed by Paul Bury with support from the in-house Cure Design team.

Cure 55 Specs

  • LOA (including bowsprit) 17.78m / 58.53ft
  • LWL 16.64m / 54.59ft
  • BOA 8.69m / 28.51ft
  • Draft (Dagger boards up) 1.3m / 4.26ft
  • Draft (Dagger boards down) 2.41m / 7.91ft
  • LWL to BWL ratio 12.17 : 1
  • Bridge deck clearance 1.01m / 3.31ft
  • Sail area (main & jib) 164m2 / 1,765ft
  • Displacement light ship 9.5T / 20,944lbs
  • Displacement maximum 13T / 28,660lbs
  • CE category A
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Webcam – Club Marítimo Castelldefels

Here’s what is happening with the wind in our local windsurfing & kitesurfing spot In Castelldefels.
A purely selfish post, this one!



Rigging Up

Heading Out

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Lagoon World Escapade 2024

To celebrate their 40th anniversary this year, Lagoon is going big on parties and events! An that includes the 2024 Lagoon World Escapade, where Lagoon owners meet up over a 3 day event to sail, eat, drink and share stories.

What are the Lagoon Escapades?

Already enjoyed by many Lagoon owners, the Lagoon Escapades have become an unmissable party every year with three days of navigation, socialising and festivities.

To mark Lagoon’s 40th anniversary, owners and future owners are invited to take part in the biggest Escapade yet, spread out over multiple countries and sailing grounds.

This year, a series of World Escapades will take place all over the world at the same time. it’s going to be a global party!

When Is It?

The festivities will take place from the from 17 through 19 May 2024.

How to Get Involved

Just register via your Lagoon dealer. by filling out the form HERE.

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First Vaan Yacht in “Vivid Alu”

Vaan Yachts, the aluminium eco catamaran manufacturer from the Netherlands, has recently presented the first Vaan yacht fininshed in ‘Vivid Alu’ finish.

To get the look, the aluminium hull was sanded to a smooth matte finish, giving it a raw and tough look. Along with the chique and soft cork decking, the large windows and the clean white painted cockpit, it enhances the catamaran’s luxury finish.

As well as looking great, there are functional benefits too as the Vaan Vivid Alu finish does not have to be repainted. You maintain the look with cleaning, and any scratches are re-sanded. What’s more, the Vivid Alu is 100kg lighter than a painted hull.

As well as a stunning finish, the Vaan Vivid Alu is also more eco-friendly. As there is no paint or fairing, the amount of chemicals used and emissions produced in the manufacture of the hull is reduced. It also makes recycling more efficient.

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Lagoon Announce New 43 Sailing Catamaran

Lagoon have released the first images of their new model, the Lagoon 43.

New for 2024, the Lagoon 43 pulls in design elements of the 55, 51 and 60 into a new forty-three footer sailing catamaran. Read our Lagoon 43 Review for more details on this sailing catamaran.
More details: on “Club Lagoon“. She’ll be shown at the Cannes Yachting Festival 2024.

Lagoon will be sharing more details at the 2024 International Multihull Show.

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La Grande Motte – a Coastal Gem

With the International Multihull Show, La Grande Motte approaching fast, we thought we would take a look at this French seaside town close to Montpellier and what makes it such an interesting place to visit.

la grande motte beach dog

La Grande Motte is a picturesque seaside town nestled on the Mediterranean coast of southern France that boasts a rich history, interesting architecture and plenty for visitors to enjoy. Formerly marshland, it has been transformed into a modern holiday destination and is popular with the sailing community.

It’s the home base for Outremer and Gunboat, and offers something for every traveller, whether it’s admiring its unique buildings, relaxing over lunch of moules, or simply taking in the Mediterranean sun.

History and Location

Located in the Occitania region, La Grande Motte lies between Montpellier and Nîmes, making it a handy stop for travellers exploring the south of France. Despite its modern appearance, the area has an interesting history dating back to ancient times when it was primarily marshland.

In the 1960s, the French architect Jean Balladur helped to transform the area into a modern resort town. His vision came to fruition, and La Grande Motte is now a famous example of avant-garde architecture and urban planning.

The Weather in April, What to Wear

April in La Grande Motte, when the Catamaran Show takes place, brings milder temperatures and blossoming flora. With an average temperature ranging from 11°C to 19°C (52°F to 66°F), April offers pleasant weather for outdoor activities.

You can expect sunny days with occasional showers, so it’s advisable to pack layers and waterproof attire for the boat show. But pack some shorts and t-shirts as well! It can be warm in the sun during the day. Make sure you have something warmer for the evenings.

Top Things to Do

Explore the Architecture
One of the most interesting aspects of La Grande Motte is its distinctive architecture made famous by its futuristic buildings and geometric shapes: the pyramids. Take a stroll along the promenade or rent a bicycle to soak in the works of Jean Balladur, including the iconic pyramids and sail-like shapes. This is a working town, the home base of Outremer and Gunboat, so there is plenty going on.

Relax on the Beaches
With its long sandy beaches lapped by the Mediterranean Sea, La Grande Motte is a great spot for sunbathing if the weather is playing ball, swimming, or enjoying water sports such as sailing and windsurfing. You might need a wetsuit in April though, unless it’s a quick dip. Plage du Couchant and Plage du Ponant are popular for sun-seekers and water sports enthusiasts alike.

Visit the Port
This is where you’ll spend most of your time at the show, and a walk around the extended port to check out the yachts is worth the effort. You’ll see a lot of Outremers here of course, and if you are lucky a Gunboat or two. And there are always plenty of Lagoons, Fountaine-Pajots and Catanas tied up. The pace of life is less hectic in April, but there are still plenty of shops and waterfront restaurants to explore.

Discover the Area’s Natural Beauty
It’s also worth exploring beyond the town to discover the natural beauty of the Camargue region. There are some good walks and horseback riding trips through the salt marshes and lagoons to the south-east of La Grande Motte. The area is home to diverse flora and fauna including flamingos and wild horses.

things to do camargue

Not far from La Grande-Motte in the heart of the Camargue, is Aigues-Mortes, a medieval city. The town has a long history linked to the crusades and templars and in the 17th century it was the most powerful port on the Mediterranean coast.

Developed under Louis IX to develop maritime trade, the city protected the kingdom of France from invaders from the East. Walk to the Constance tower, visit the Notre-Dame-des-Sablons church, explore the Place Saint-Louis or check out the chapel of the brotherhood of the Pénitents Gris.

Where to Eat

For a no-frills, delicious lunch or dinner in La Grande Motte, order the local mussels at “Le Roi de la Moule” or Chez Tetel. Near the marina, this restaurant specializes in fresh seafood dishes, with moules marinières (mussels in white wine sauce) being the signature dish. Pair your meal with a crisp glass of local white wine and enjoy the flavours of the Mediterranean.

In addition to “Le Rio de Moules,” other great restaurants in La Grande Motte include:

– Le Marin’Sol. Close to the port, this is the most popular restaurant with the Yacht Show crowd (it’s pretty close to the Outremer yard), so book early. Good pizza and lamb and a buzzy atmosphere, especially on show days.
343 Avenue Robert Fages, 34280 La Grande-Motte, FR. Reservations: 04 99 62 76 32

– Le Flow – lounge bar to chill out in that serves tapas an delicious desserts

– Le Bistrot du Port: A cozy bistro located in the heart of the marina, known for its seafood stews, fresh salads, and desserts.

la grande motte beach view


La Grande Motte is not a well-known destination to travellers, but that’s all part of the appeal. With the pyramids, the flamingos and its natural beauty, this French town offers visitors a unique coastal experience with history, culture, and good food. Get off the beaten track and have an explore while you are at the boat show!

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Lagoon 60 Launch and Some History

We spent some time recently at the Lagoon shipyard in Bordeaux, where they build their bigger catamarans (over 50 feet). It was great to hear some of the history behind the yard and meet some of the team behind this successful multihull manufacturer.

lagoon 60

Here are some snippets from the day. With thanks to Thomas Gailly, LAGOON Brand Director, Clément Himily, CEO and Quentin Beraut, Lagoon Product Manager.

Celebrating 40 Years

2024 is going to be a big year for Lagoon Catamarans. This year they celebrate their fortieth anniversary and they’ve decided not to celebrate once but to celebrate all year long.

Two weeks ago in Miami, at the boat show they had a big party, had a great time and are now holding another one here in Bordeaux at their HQ.

Lagoon is the biggest catamaran producer in the world. For the first time, they are presenting the full range from 40 to 78 feet with the entire team. It’s a big challenge. They have been organising different boats at boat shows for 40 years, but doing it during the week in the shipyard with hundreds of clients visiting: that’s something different. They have people coming from all around the world Mexico, Norway, Thailand, Sweden, France, everywhere.

Lagoon Cares

One of the drivers for the company is a desire for responsible growth under the banner “Lagoon Cares“. Lagoon is on a mission to prove it cares about the environment, and it cares about the ways its boats are built and used.

In addition to a focus on using ever more sustainable materials, they have entered into a long-term partnership with Coral Guardian, a French NGO that aims to protect and restore coral reefs globally through the empowerment of local communities. They replant corals everywhere in the world. Lagoon is financing this NGO together with many of its clients.

Lagoon has more than 400 clients coming to see the new 60 and the whole range in Bordeaux. Some of them are Lagoon owners, some of them have their boat in build and some of them have a project of buying a boat. They want to have them talk together and get the alchemy working.

Boris Diaw, the NBA Connection

One of their SEVENTY 7 customers is Boris Diaw who won an NBA championship with the San Antonio Spurs in 2014. Boris is a great ambassador because he’s a real Lagoon user with his SEVENTY 7. Right now the boat is in Auckland NZ.
He’s flying there in one or two weeks joining the boat to do the crossing to Tahiti.

Production & History

clement himily, Lagoon CEO

Clément Himily, CEO of Lagoon, then shared some fascinating history behind Lagoon and the shipyard.

“We have three shipyards, all in France. Two of them are in Vendee which are specialised in the production of the Lagoon 40 to 46.

Here in Bordeaux, we are focused on the production of Lagoon Catamrans above 50 feet, from the 51 to the Lagoon 78.”

“This shipyard is unique in the world for the production of catamarans of this size.”

A Strong Legacy

“There is more than 150 years of naval history here”.

“The shipyard specialised in the construction of Cruisers and tankers, but this ceased in 1985.”

“Two years after, two guys, Dieter Gust and Olivier Lafourcade, founded CNB which was initially specialised in the production of large aluminium monohulls. This led to the creation of 46 unique one-off yachts building the reputation of the site including the Mari-Cha II in 1989 (Philip Briand custom), and the 117’ Hamilton II.”

Photo Credit Nicolas Claris

“These boats were built here in Bordeaux with many of the team that is here today. That helped build the expertise of this site in the design and manufacture of large sailing yachts.”

“In the meantime, in Vendee, there was a department called JTA ( Jeanneau Technologies Avancees) a legendary workshop for the development of high-tech sailing yachts. Lagoon Catamarans were quickly recognised for their single-hull and multihull off-shore racing boats.”

“JTA was specialised in racing boats, and multihulls, building very famous ones with VPLP at the design helm.
Because this team was becoming very famous in the production of multihulls, Lagoon became involved in the Waterworld movie. Lagoon built the boat for the movie production team. The guy behind the wheel in the movie is not Kevin Costner!”

The First Lagoon 55

Lagoon 55-01

“Following our Hollywood and Hawaii episode, a lady came to us one day, a lady from Bordeaux. She wanted a one-off yacht, but not a racing boat, a cruising Multihull. She wanted to do some chartering on a big catamaran for cruising- 55 feet and in 1984 55 feet was a big catamaran.”

“We looked for a good architect, so naturally asked VPLP. Maybe they could also design a Cruising boat? This was how Lagoon built its first cruising Catamaran. The boat was a success, in charter as well and the lady decided to build another one.”

Napkin Contract
“So, we thought, maybe we can develop a brand, we can start a nice story? But we needed a name. One name came out on top of the others, and it was the name that the lady gave to her first boat: “Lagoon”. We came to an agreement on the corner of the table in a restaurant, a kind of small contract on a napkin to provide some royalties if we sell a few more of them.”

“Luckily, we make a limit on that. We said that after 10 years we stop. So, that was the history!”

“Today, years later, Lagoon is a world leader with dealers everywhere and seven thousand Lagoon yachts sailing worldwide. And that’s starting from our very passionate team.”

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Marine Electric Engines: How They Work

By François Meyer | January 2024

Last season’s boat shows allowed us to visit and test several electric and hybrid-electric catamarans. It is now a reality: catamarans no longer necessarily have diesel auxiliary propulsion but can be equipped with electric motors.

But how do they work and how do we compare their performance to more traditional power units? Electric, hybrid, power, voltage, charging, autonomy: there are many questions that arise from these configurations.

The aim of this article is to explain the various technologies and see things more clearly. For example, we will take a look at Electric Engines vs Diesel Engines and compare serial and parallel hybrid power systems.


Range and Power Density
Range and autonomy play a key role within cruising catamaran capabilities. Diesel delivers a huge range because of the high power density of this fuel.

For diesel, one 20 litre jerrycan of diesel (25 kg including the can) contains 204 kWh energy, which is very substantial compared to a battery bank. If you wanted to store 204 kWh energy in a battery bank, it would weigh more than 1200 kg.

The high power density of fossil fuels is one of the main reasons for the dependence of the industrialised world on this fuel. Conserving power within batteries costs a lot of weight and money and requires powerful inboard charging.


Diesel Engines

Because of the high power density of fossil fuels used in combustion engines, the efficiency of diesel ones, was not such an important consideration, especially in boating.

The average overall efficiency of a diesel engine rarely goes beyond 40%. It means you “lose” around 60 % of fuel within the process. Lots of internal mobile parts generate friction and heat which is the main loss.

Furthermore, most catamarans use saildrives. This transmission choice, saves space inside the hulls, but comes with around 10% more losses (gears) compared to a shaft drive.

So at the very end of the day, from an energy point of view, a catamaran fitted with diesel saildrives is not very efficient.

Efficiency of Diesel Engines

Electric Engines

On the other hand, there are not as many moving parts in an electric engine that uses a low friction magnetic field to operate. Their overall efficiency is much higher, higher than 90% in the case of the Permanent Magnet electric motors used in marine vessels.

Better efficiency means also avoiding waste! For that reason, most newbuild catamarans are choosing shaft drives, not
saildrives, to achieve better overall efficiency. Electric saildrives, like Oceanvolt Servoprop, are mainly designed for saildrive designed boats whose bilges are simply too small to receive a shaft.

Efficiency of Electric Engines

Downsizing : Diesel and Electric Power Engine Comparison

You may have already noticed this, but electric catamarans are commonly fitted with engines whose power rates well below diesel ones. Firstly there is the conversion factor between horsepower and kilowatt. This is just maths, as 1 kilowatt (kW) is equivalent to 1,36 HP.

The big difference is in torque availability. A diesel engine has its nominal power and torque (the ones that are advertised) at high RPM, at a much higher speed than an engine should be used.

On the graph below, we see power and torque of both diesel and electric engines.
For a traditional setup, the power is represented by the dark purple curve at high RPM of a diesel engine (max at 3200 RPM).

power torque curve electric vs diesel engines

If we look at the light purple curve (electric engine), this shows the power of an electric motor is almost constant, after starting.

Let’s now have a look at the torque curves. Torque is the force which turns the propeller and propels the boat.

At 1800 RPM, both motors benefit from 100% of their torque. To achieve 150 Nm of torque, the electric motor needs only 20 kW while the diesel requires 42 kW!

The combination of high torque-low RPM and better overall efficiency mean that you can downsize electric engines when compared to diesel ones. The downsizing sits between a factor of two and three.

System Tension

One of the basic rules of electricity involves the relationship between power, voltage and current.

Power (W) = Voltage (V) x Current (A). The higher the voltage is, the lower the current. Lower amps means, on a boat, smaller diameter cables. But higher voltage also means lethal danger.

There is a physiological limit for a human being (above 120V DC): the heart can be stopped by electrical shock. In wet conditions, this limit goes to 60V DC. That is why most hybrid catamarans are wired at 48V, well below 60.

Some boatbuilders, like Fountaine-Pajot with the Smart Electric Series (Aura 51, Elba 45…) use a 400V DC setup. It is a boatyard choice, but only very educated and skilled tradesman will work on such systems when any marine electrician will be happy to work the more common 48V system.

Electric, or hybrid?

Electric catamaran
An electric catamaran is a vessel whose principal propulsion is provided by the wind and whose auxiliary propulsion is provided by an electric motor. On board a 100% electric catamaran there is no combustion engine and no other energy than electricity.

There are not many 100% electric catamarans around as their range, dependent on battery capacity and onboard chargers, is too low for cruising.

The story of Jimmy Cornell’s Outremer 4.Zero is interesting as the renowned sailor decided to go, against the will of the yard, with a full electric (ie. not carrying a diesel genset). In the end, power consumption and power production were not in balance and the fossil free circumnavigation project failed. Relying only on a small sized solar panel array
(1,3 kWh) and relatively inefficient regeneration, the boat’s energy consumption was simply too high.

On that boat, fitted with 2 x 10 kW Oceanvolt Servoprop saildrives and 17,5 kWh of batteries, the range, motoring, at mid RPM is less than two hours. Regeneration was delivering around 300 Wh, (0.3 kWh), too few to refill the batteries while using all of the electric appliances.

Hybrid Catamarans
A hybrid catamaran is a vessel whose principal propulsion is provided by the wind and whose auxiliary propulsion is provided by different means including an electric engine. Its system uses two or more power sources on board.

Hybrid catamarans can be equipped with an auxiliary main diesel propulsion, assisted by a secondary electric one (parallel hybrid or bi-motorization), or with auxiliary electric engines relying on batteries that can be recharged under way by a generator (diesel, hydrogen, methanol), ie a serial hybrid. This greatly increases the range.

Because of the requirement for a good range, most of the so-called electric catamarans like the Windelo 50, HH44, Fountaine-Pajot Smart Electric Series, O-Yachts Class 66 Eco are hybrid catamarans.

Serial Hybrid Catamarans

serial hybrid

A serial hybrid catamaran is propelled by two electric motors. Those motors get their power from batteries which are being charged while sailing using various means.

Solar (photovoltaic) panels account for an important share of renewable energy in the energy mix. Hydrogeneration does not depend on light and can deliver power at night, when sailing a passage.

Serial hybrid catamarans always have a back-up power generator to fill the batteries when needed. The generator can be diesel, or in the future hydrogen, ammonia or methanol (fuel cells).

The Windelo 50 is probably the most efficient serial hybrid sailing catamaran on the market.

Light and fast, she sails well and her two 20 kW electric engines with shaft drive deliver the best efficiency possible. Wired in 48 VDC, with 53,8 kWh of battery capacity (propulsion, 6 kWh house bank), the boat boasts a 5,5 kWc photovoltaic array.

Under sail, on a passage, the boat produces enough power to cover its consumption and slowly charges its batteries. Solar gives her between 20 to 30 kWh per day (depending on latitude) and hydro regeneration, around 24 kWh per day when sailing 10 knots.

But, if needed, the generator can be started, delivering 17 kWh to the battery bank to replenish it within hours. Or, if they are empty, to provide 6 knots motoring speed, the genset is used.

Combining those three methods of charging, the yard claims a 1100 NM range, which is twice the range of a Lagoon 42 with its two 57 HP diesels.

Nevertheless, the Lagoon 42 still has the advantage of power as it can increase its RPM when motoring against waves and tide to cruise at 7 knots while burning more fuel. The Windelo cannot do that, and, in such conditions, its motoring speed will lower.

The Lagoon retains a second advantage as if one diesel fails, the boat still has the other to

If Windelo loses its genset at night with depleted batteries, she will have to rely on her sails. Some owners choose a 2 genset configuration for redundancy, but that does add weight and cost.

Parallel Hybrid Catamarans

This set-up uses an electric motor mounted on the diesel engine, both capable of moving the propeller. Where the serial hybrid has two functions (moving and regen), the parallel has four.

The diesel engine can propel the boat. While doing that, it can also move the electric engines which will produce some power, acting as a generator.

The electric engine can move the propeller, diesel off. And, in emergency cases, both electric and diesel engines can move the prop, in a kind of boost mode.

The parallel hybrid yachts do not need any generators as their engines behave as powerful ones. This setup fits particularly well for cruising catamarans as you can enjoy the joy of silent sailing or electric motorsailing but you can always rely on your trusty diesels if needed.

The two systems do not rely on each other and offer an interesting case of redundancy.

hh44 sailing catamaran

A catamaran like the HH44, charges 5,4 kWc from solar and has two 30 HP diesel + 2 10 kW electric motors using a 43,2 kWh battery bank. While diesel motoring, the boat delivers 10 kW to charge the batteries. A sunny day can also fully charge the bank.

Those 43,2 kWh can propel the yacht at 6 knots for a couple of hours. Total range (diesel) is around 628 NM, according to the yard, a range which comes with a good dose of redundancy.

Bi-motorised hybrid catamaran

This third hybrid mixes 2 independent propulsion systems, a diesel one and an electric one.


O-Yachts offers, in its Class 66 Eco, a bi-motorised setup for example. One hull has a conventional diesel with shaft and the other an electric engine with a shaft-drive.

As the two systems are totally separated, the redundancy is there. The boat can be sailed with one engine, diesel or electric, and a small 5° rudder correction will drive the boat straight. Diesel alternator, regeneration and solar replenish the batteries.

This setup, although interesting, suffers from a disadvantage. As the two engines are different, they behave differently and this can cause issues manoeuvring in the marina. The skipper will need plenty of experience in different conditions before fully mastering the boat.

o-yachts class 6 power ECO