Lithium-ion batteries without external BMS communication capability and UL 1973 certification are unsafe for marine use, particularly when installed under bunks or behind heads, as thermal runaway can cause fires that destroy the vessel.

normativepending

Speaker

Nigel Calder

Evidence Quote

with lithium-ion if you get it wrong it's likely to go up in smoke and you lose the boat so with that you will 1973 sticker on the battery you can be pretty certain that there's just about nothing stupid you can do that's going to cause that battery to catch fire

Source

Lithium Batteries for Your Boat with Nigel CalderPacific Yacht Systems
Created: 8/13/2026, 9:56:33 AM

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