The REXH₂ is a modular ”Plug & Play” hydrogen power generator system for marine and river navigation that uses a Toyota fuel cell to help propel and/or power on-board systems without emissions or noise. Hybrid, it adapts to all types of system, whether electric or diesel, if necessary.
A sustainable & mobile energy source
Quiet
A solution that preserves underwater plant life
Our guaranteed emission-free, noise-free and particulate-free hydrogen solution preserves marine ecosystems and underwater flora for sustainable navigation.
Adaptable and high-performance
A modular system that adapts
The REXH₂ is a 70kW “Plug & Play” solution with a footprint of less than 2m3, making it the most compact and adaptable Range Extender on the market.
Certified and reliable
A reliable and certified genset
Rigorously tested, the REXH₂ features advanced functions that ensure safe and reliable operation. It is one of only three marinized hydrogen fuel cell systems in the world certified by Bureau Veritas with TAC approval.
Concentrated power
& performance
Reliable
High-performance and reliable
The REXH₂ is a modular solution that integrates Toyota’s latest generation 70kW fuel cell. Operating with hydrogen, this marine generator can be parallelized up to 8 units offering 560 kW of power on its own.
Certified
TAC certified
The REXH2 has received the Type Approval Certificate (TAC) from Bureau Veritas, making it one of only three hydrogen solutions worldwide to achieve this level of certification. This certification guarantees the reliability and safety of our generator, enabling its integration into vessels under 500 GT (Gross Tonnage). The TAC also facilitates the approval process for ships exceeding 500 GT.
Modular
A turnkey solution
The REXH₂ has the advantage of being a modular “Plug & Play” solution that adapts to all types of configuration and vessels. It can be used for propulsion, life on board and navigation systems on both pleasure and professional vessels alike.
intelligent
Intelligent and connected
Its system integrates continuous, real-time monitoring of generator performance and hydrogen levels, and anticipation of maintenance operations thanks to EODev Connect.
Hybrid
A hybrid solution
The REXH₂ is a hydrogen marine system that is compatible with any electrical system and provides continuous power. It is ideal for use alongside batteries. If necessary, its hydrogen system can be coupled with a diesel-electric unit to enable noise-free, emission-free sailing in protected areas, near the coast or in ports, particularly over long distances where diesel power is indispensable.
A certified, compact & efficient solution
The REXH2® control system makes it easy to manage and monitor performance.
Electrical cabinet containing our control system and our safety card for communication with the ship’s various electrical interfaces.
The group is equipped with Toyota’s latest-generation fuel cell, the same one used in Mirai hydrogen-powered cars.
For efficient cooling, REXH2® can use seawater or interface with the ship’s closed cooling circuit (glycol). This system has no environmental impact.
Hydrogen connection nozzle for fuel cell.
Ventilation outlet and fuel cell exhaust.
For reasons of operational safety, this ventilation system ensures that the REXH2® is underpressurized.
Three hatches provide easy access to the REXH2® for maintenance.
Air intake to supply the fuel cell with oxygen.
Nominal Power Rating
70 kW
Output voltage
650/724 VDC
Dimensions
1060 x1710 x1020 mm
Hydrogen inlet pressure
11-15 bars
Weight
620kg
Download the on-line brochure
Respectful & Made in France
REXH₂ is a certified zero-emission solution that has been designed, developed and produced in France, using components that keep its environmental impact to a minimum and make it easy to repair.
A solution for every vessel
Pleasure craft
The REXH₂ can be integrated into any type of pleasure craft. Whether it’s a catamaran or a smaller vessel, it will adapt to all types of configuration and motorization to offer an optimal experience.
Fishing vessels
Professionals in the maritime and fishing industries will particularly appreciate the silence of the REXH₂ system, enabling them to navigate without noise or emissions along the coast, at the entrance and exit of ports, and in fishing zones to preserve underwater flora.
Passenger transport
Thanks to its TAC certification, our Range Extender is able to carry a wider range of passengers safely, and to adapt to a wide variety of vessel sizes.
A dedidacted support team
Reliability, quality, and durability are the core values driving the experts of the Blue Tech Energy Crew: our technical support team. They support you at every stage with streamlined management and a turnkey offer that includes administrative assistance, training, and on-site maintenance.
REXH₂: Marine hydrogen power generator for zero-emission onboard energy
REXH₂ is a marine hydrogen power generator designed to produce electricity onboard without emissions or noise. Built for maritime and inland waterway applications, it addresses the need to decarbonize marine transport while ensuring a reliable and continuous power supply.
This modular, plug-and-play onboard solution integrates easily into various types of vessels, including passenger ships, workboats, leisure boats, and inland vessels. It enables clean onboard power generation without relying on traditional diesel generators.
What is a marine generator?
A marine generator is a system designed to produce electricity onboard a vessel. Unlike land-based generators, it is specifically engineered to withstand harsh marine conditions such as humidity, salt corrosion, vibrations, and continuous operation.
It powers onboard systems such as navigation equipment, lighting, air conditioning, safety systems, and passenger services.
New-generation solutions like hydrogen-powered marine generators significantly reduce emissions and noise while improving overall energy efficiency.
How does the EODev REXH₂ work?
The REXH₂ is powered by an integrated Toyota fuel cell system that uses hydrogen to generate electricity.
The process works as follows:
- hydrogen reacts with oxygen from the air
- this reaction produces electricity
- the only by-products are heat and water vapor
The system can be integrated into a hybrid onboard energy architecture alongside batteries or shore power, allowing optimized energy management.
Its modular design ensures easy integration across different vessel types and operational needs.
Why choose a marine hydrogen power generator?
Zero-emission navigation
Unlike diesel generators, hydrogen-powered systems produce no CO₂, NOx, or particulate emissions during operation, supporting maritime decarbonization goals.
Silent operation
With no combustion involved, noise levels are significantly reduced, improving onboard comfort and enabling use in sensitive or regulated areas.
Future-proof solution
As environmental regulations in the maritime sector become stricter, hydrogen-based systems provide a sustainable alternative aligned with future standards.
Technical specifications of REXH₂
Energy performance
- Zero-emission onboard electricity generation
- Designed for marine energy needs
Technology architecture
- Toyota fuel cell system
- Modular and scalable solution
- Hybrid operation possible with batteries
Marine integration
- Designed for harsh marine environments
- Resistant to humidity, corrosion, and vibrations
- Compatible with various vessel configurations
Operation and maintenance
- Reliable system designed for continuous use
- Reduced maintenance compared to diesel systems
Marine generator vs standard generator: what’s the difference?
A marine generator differs from a land-based generator in several key aspects:
- designed for marine conditions (salt, humidity, vibration)
- equipped with specific cooling systems (heat exchangers)
- meets strict marine safety and certification standards
- built for continuous operation
Hydrogen solutions like REXH₂ go further by eliminating combustion entirely, reducing emissions, noise, and maintenance requirements.
Applications of hydrogen marine generators
REXH₂ is designed for a wide range of marine applications:
- passenger vessels
- workboats
- inland waterway transport
- leisure boats
- port service vessels
- hybrid propulsion and onboard energy systems
These use cases address real needs such as clean onboard power generation, reduced emissions in port areas, and silent operation at berth.
Marine generator price: what to expect
The price of a marine generator depends on several factors:
- required power output
- system configuration
- onboard integration constraints
- marine certifications and standards
- maintenance and operational requirements
Hydrogen solutions are typically priced on a project basis, reflecting system customization and total cost of ownership benefits, including reduced fuel consumption and maintenance.
Lifespan and maintenance of a marine generator
The lifespan of a marine generator depends on operating conditions, maintenance practices, and technology.
Traditional combustion systems require regular servicing due to wear, deposits, and corrosion. Hydrogen fuel cell systems reduce these constraints by eliminating combustion, potentially extending system lifespan and reliability.
A sustainable marine energy solution
REXH₂ is part of a new generation of clean maritime energy solutions.
It helps reduce environmental impact, improve onboard comfort, and support the transition toward low-carbon marine operations.
As a hydrogen-based alternative to diesel generators, it opens the way for more sustainable and efficient hybrid energy systems.
