{"id":70357,"date":"2026-08-16T11:10:59","date_gmt":"2026-08-16T09:10:59","guid":{"rendered":"https:\/\/www.sea-help.eu\/news-general\/lithium-battery-safety-box\/"},"modified":"2026-08-16T11:10:59","modified_gmt":"2026-08-16T09:10:59","slug":"lithium-battery-safety-box","status":"publish","type":"post","link":"https:\/\/www.sea-help.eu\/en\/guide\/lithium-battery-safety-box\/","title":{"rendered":"Lithium batteries on board: <\/span><\/span>Will safety boxes for lithium batteries become mandatory?"},"content":{"rendered":"

Lithium-ion batteries have become an integral part of modern recreational boating. They power electric outboard motors, e-foils, underwater scooters, drones, tools, onboard electrics and, increasingly, complete propulsion systems for yachts<\/a>. However, as their use grows, so does concern about fires on board. Many skippers are therefore asking: will lithium batteries soon have to be stored in special safety boxes?<\/strong><\/p>\n

The short answer:<\/strong> for most private recreational boats in Europe, there is currently no general legal requirement to store lithium batteries in special safety boxes. However, standards, classification requirements and safety guidelines are increasingly tightening the requirements for installation, monitoring and fire protection. SeaHelp provides an overview.<\/p>\n

New standards instead of a general box requirement<\/h2>\n

An important step in this regard was the publication of the ISO 23625:2025 standard<\/a>, which last year defined concrete requirements for lithium-ion batteries on recreational boats for the first time. It regulates the selection, installation and safety of battery systems with a capacity of more than 500 Wh on board recreational boats.<\/p>\n

At the same time, the International Maritime Organization (IMO)<\/a> is working on a comprehensive safety framework for battery-electric ships and battery storage systems. The development of corresponding regulations is currently in full swing.<\/p>\n

The European Maritime Safety Agency (EMSA<\/a>) has also already published guidelines for onboard battery storage. Although these are not (yet) mandatory, they already serve as a point of reference for many authorities and classification societies.<\/p>\n

Why lithium batteries are problematic on board<\/h2>\n

The greatest danger is so-called “thermal runaway.” In this process, a damaged or faulty cell heats up increasingly on its own. Temperatures of several hundred degrees Celsius and toxic gases are produced, often resulting in a fire that is difficult to control. What is particularly critical here is the fact that a single battery can “ignite” neighboring batteries and trigger a chain reaction.<\/p>\n

On a yacht, the situation is made worse by the following:<\/strong> there are usually only limited escape routes, small reserves of extinguishing water, very cramped technical spaces, and often flammable interior fittings made of wood or plastic on board.<\/p>\n

For this reason, classification societies such as Det Norske Veritas (DNV) require extensive safety measures for larger battery systems, such as temperature monitoring, ventilation and special extinguishing systems.<\/p>\n

Safety boxes: not mandatory, but increasingly standard<\/h2>\n

No European regulation currently explicitly requires private recreational boats to store spare batteries in safety boxes. However, many insurers, shipyards and safety consultants now explicitly recommend doing so. Two product groups are particularly relevant here:<\/p>\n

RACLAN systems<\/h3>\n

The RACLAN systems<\/a> were developed specifically for storing and charging<\/a> lithium-ion batteries. The boxes are made of fire-resistant composite material and, depending on the model, feature an integrated extinguishing system that is triggered automatically in the event of a critical rise in temperature. They are designed to contain fires and prevent them from spreading to the surrounding area.<\/p>\n

Some models are explicitly designed for storing, transporting and charging lithium batteries. The manufacturers advertise the systems as explosion-proof and fire-resistant.<\/p>\n

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ZARGES<\/h3>\n

The BatterySafe solutions from ZARGES<\/a> were also developed specifically for lithium batteries. The aluminum cases feature a non-combustible interior lining and are designed to significantly reduce the impact on the surrounding area in the event of a cell fire. They are used for both storage and transport.<\/p>\n

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