The Brittany Region has granted a subsidy of €1.5 million to Green Navy for its hydrogen-powered passenger shuttle project. Named Prometeo, this initiative aligns with the regional roadmap for renewable hydrogen deployment, adopted in 2020.
Green Navy, a company based in Finistère and a subsidiary of the Vallair Group, shares the ambitious goals of the Region in promoting clean and responsible maritime transport.
Green Navy is developing Prometeo, its zero-emission catamaran for coastal passenger transport at its facility in La Forêt-Fouesnant, Brittany, France.
Currently in its initial production phase, this vessel is equipped with optimised electric propulsion and hydrogen storage tanks. It will be offered as a bare-boat charter solution and could also, in the medium term, be sold to shipowners or public authorities responsible for inter-island, urban bay crossings, or leisure sea trips.
To address the challenges of decarbonising maritime transport, Green Navy leverages its expertise in naval architecture and propulsion chain design, prioritising safety and energy efficiency.
Acting as a design office, project manager, and prime contractor, Green Navy develops the concept and selects the best components and subcontractors to ensure the vessel’s reliability and performance.
The catamaran’s propulsion system operates using high-efficiency electric motors and optimised propellers. These motors draw energy from buffer storage batteries. The onboard hydrogen serves as a complementary energy source, with a higher capacity than that of the batteries.
By combining hydrogen with oxygen from the air within two fuel cells, electricity is produced, which in turn recharges the batteries.
