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split charge relay, with solar charging engine battery

spaceHopper · 2023-05-24 10:45:26

I want to add solar to my camper and to upgrade the battery to a bigger one. I'm thinking of changing out the 30 year old relay in it for new one. I picked up a solar charge controller that will also charge the engine battery as well as the leisure battery. But I've question. If I put in a smart or voltage sensing relay…

24-05-2023 10:45am

#1

spaceHopper

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I want to add solar to my camper and to upgrade the battery to a bigger one. I'm thinking of changing out the 30 year old relay in it for new one. I picked up a solar charge controller that will also charge the engine battery as well as the leisure battery. But I've question. If I put in a smart or voltage sensing relay will the solar charge controller make it think the engine is one and activate the relay when it shouldn't?
https://www.wiredcampers.co.uk/collections/12v-split-charge-relay-kits

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Comments

#2 26-05-2023 4:54pm

Alkers

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Most of those split charge relays will detect charging current at either battery and charge both batteries accordingly.
So the alternator or solar output will go to both batteries.

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