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roberthudson859 avatar image

Buck Boost

I have purchased a victron system for my van conversion. I have a 50 amp buck/boost and the run from vehicle battery is 4.5m. I have at the moment a 200amph victron lifepo but intend to add another 200amph. What size cable should I use from vehicle battery to buck boost. I will upload my schematics


campervan
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The RJ45 VE.Bus wire from the BMS to the cerbo GX is not needed.

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JohnC avatar image
JohnC answered ·

Hi @Roberthudson859@gmail.con

Cable size mm2 = A/3, for a quick calc. So 50/3 = 17 mm2. Or bigger.

But there's more to it than that: https://www.victronenergy.com/upload/documents/Wiring-Unlimited-EN.pdf


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