question

jurasik avatar image
jurasik asked

VW T5.1, non-smart alternator & LiFePo4 100Ah battery & DC-DC charger

Hi all. I'm in the planning stages of adding a leisure lithium battery to my T5.1. I am pretty sure my van does not have a smart alternator (does not have start-stop) & I'm looking to fit a Lithium leisure battery under one of the seats. The one I'm looking at is this:

https://uk.eco-worthy.com/collections/12v/products/lifepo4-12v-100ah-lithium-iron-phosphate-battery

My question is which of the victron DC-DC chargers do I need to buy to charge the battery, without damaging the alternator?

I have converted a T4 in the past, but Lithium batteries are new to me & from what I have read online, if I get this wrong, I can destroy the alternator.

battery charging
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1 Answer
kevgermany avatar image
kevgermany answered ·

Check the alternator output rating. Rule of thumb: Size the charger so that total sustained load is around 50% max.

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