· What?
Decarbonizing leisure boating?

CapX hydrogen capsules, designed by Studio DE LUSSAC for NamX and the automotive sector, have also been engineered for a wide range of applications — including drones, agricultural and construction machinery, scooters, generators, and telecommunications equipment.

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Nautical enthusiasts often ask:

“How can we decarbonize coastal pleasure boating?”

Batteries are not yet a viable solution:
• Limited autonomy — an 8-meter boat requires 500–800 kg of batteries for only 1 to 2 hours of navigation, and weight severely affects maneuverability.
• Slow charging times and lack of fast-charging infrastructure.
• Harsh marine conditions for batteries: saltwater, intense charge cycles, and fire risks.
• Rare metal pollution and complex, energy-intensive recycling.

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· How?
Hydrogen is a powerful alternative:
• Refilled in 3 to 5 minutes
• 2 to 3 times more autonomy
• 5 to 6 times lighter
• No rare-metal or battery-related pollution, simplified recycling

However, the challenge remains: there are no public hydrogen stations on the coast due to high infrastructure costs, regulatory constraints, and lack of standardization.

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CapX offers a simple and ultra-practical solution.
Its interchangeable lightweight hydrogen capsules and light infrastructure provide a game-changing response to marine decarbonization challenges:

• Zero emissions

• Ultra-fast refueling/swapping (≈4 min)

• Modularity and safety

• Minimal maintenance

• 3 to 4 hours of autonomy, extendable with extra capsules stored onboard

 

To demonstrate CapX’s full potential at sea, Studio DE LUSSAC designed SharX — a sleek, fully hydrogen-powered semi-rigid boat (5.5m, 8 passengers).

Pushing innovation further, SharX features lateral foils that enhance speed and energy efficiency — and also serve as fun slides for diving into the sea. Clean tech can be joyful too!

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SharX is powered by an electric motor (40–60 hp) supplied by 8 CapX capsules (500g H₂ each), with an optional hydrogen combustion engine.
This concept proves that decarbonizing marine mobility can be elegant, efficient, and scalable.

The maritime sector is a key pillar of the energy transition.
With CapX, hydrogen finally becomes a viable, scalable solution for boats under 8–10 meters: semi-rigids, outboards, pleasure or racing sailboats, and more.

Investor, boatbuilder, integrator, engine manufacturer, or fleet operator?

Let’s talk.

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Special thanks to the DE LUSSAC Studio team — Pierre Poisson for leading the design, and Romain Grangier for video production.