LR issues updated guidance to support safe fuel cell integration on board ships
An example high-temperature fuel cell (Source: Bosch)
Lloyd’s Register (LR) has released updated Guidance Notes on the Installation of Fuel Cells on Ships (July 2025 edition), offering shipbuilders and shipowners a clear framework for the safe integration of fuel cell systems on both newbuilds and retrofits.
The revised guidance reflects recent regulatory updates and advances in fuel cell technology, corresponding to LR’s 2024 rule changes for fuel cell installations. It introduces two key safety concepts - emergency shutdown-protected fuel cell spaces and gas-safe fuel cell spaces. The latter allows for fuel cell systems to be installed in conventional machinery spaces, simplifying retrofits while ensuring compliance with fire protection, explosion prevention, and hazardous zone standards.
The document also covers lifecycle and operational considerations including degradation, maintenance, power conditioning, thermal management, and inert gas purging. Tailored risk assessments are emphasised to address hazards such as fire, explosion, toxicity, and electric shock.
“This new guidance provides a detailed framework for the safe and reliable integration of fuel cell technologies onboard ships. By clearly defining safety and operational parameters, we aim to foster confidence and innovation in next-generation propulsion systems.”
The updated guidance is available through the latest edition of LR’s Rules and Regulations.
