Green, stable energy with H-battery – Final development, design, and construction of a 35 kW prototype

Challenge
ShipTown is developing the H-Battery – a reversible alkaline fuel cell that combines electrolysis and a fuel cell in a single unit. The technology enables storage of green electricity as hydrogen and conversion back to electricity, with an electrolysis efficiency of >90% and a fuel cell efficiency of 60%.

The solution is developed without the use of rare metals, features low CAPEX, and has a long lifetime. The H-Battery makes it possible to balance large amounts of renewable energy—not only over hours, but also across seasons—thereby addressing one of the most pressing challenges in the future energy system. The technology has been demonstrated at laboratory scale in a 5-cell prototype, where the efficiency has been documented. This step scales the technology to a 35 kW prototype and achieves TRL 6. This creates a bridge to full scale at 2 MW, which can be realized either by scaling up the cell diameter or by interconnecting modules, depending on the technical experience gained and the design choices made in the present project.

Solution

1. Final development and design of mechanical and system integration
2. Technical co-development with subcontractors and sourcing
3. Assembly and FAT testing of the 35 kW H-Battery prototype
4. Verification of efficiency, functionality, and safety (including support from FORCE or DTI)

Impact

1. Final development and design of mechanical and system integration
2. Technical co-development with subcontractors and sourcing
3. Assembly and FAT testing of the 35 kW H-Battery prototype
4. Verification of efficiency, functionality, and safety (including support from FORCE or DTI)