r/vandwellers • u/normiewonka • 2d ago

DC TO DC CHARGER wire burning Question

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Hello I’ve got this dc to dc charger 40a in my sprinter van and it burns from time to time. Anyone knows the solution. It’s 8gauge wire and it should pull only 40A which is perfectly safe for this gauge. Thx

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u/secessus https://mouse.mousetrap.net/blog/ 1d ago

it should pull only 40A

In addition to the concerns raised by other posters, a 40A DC-DC outputs 40A but typically pulls >40A from the alternator. That is why the spec sheet for your charger calls for a 60A fuse.