RetroCell
Clean propulsion without replacing the whole vessel
RetroCell is a compact hydrogen-electric retrofit concept for commercial vessels under 12 metres, combining fuel cells, batteries and intelligent energy management.
A practical transition for working boats
Small ferries, tour boats and fishing craft often have long operating lives, yet replacing an entire vessel to reduce emissions can be financially and materially wasteful.RetroCell explores a modular kit that replaces conventional propulsion components with a coordinated hydrogen fuel-cell and battery-electric system while respecting the limits of compact marine spaces.
Project overview
Lead: Bellacet Ltd
Duration: 6 months
Focus: Maritime innovation
Location: United Kingdom
Small vessels leave little room for compromise
Retrofit systems must work within tight weight, volume, ventilation and safety constraints. Commercial operators also need predictable range, straightforward maintenance and minimal time out of service.The project treats installation, controls and vessel integration as one engineering problem rather than a collection of separate components.
A coordinated retrofit system
Hybrid power
Fuel cells and batteries share demand to balance endurance, response and efficiency.
Intelligent control
Energy management coordinates propulsion, charging and auxiliary loads in real time.
Compact integration
Modular hardware is designed around the practical constraints of sub-12-metre vessels.
A credible pathway to cleaner fleets
RetroCell will define system architecture, installation requirements and operating scenarios for representative commercial craft.The work will consider hydrogen storage, electrical integration, safety, service access and the operational case for vessel owners.By focusing on retrofit, the concept aims to extend the useful life of existing boats while creating a realistic route toward lower-emission coastal operations.