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jjrbus's avatar
jjrbus
Explorer
Feb 10, 2023

Battery isolator charge vehicle battery on shore power

I have a new to me 02 Roadtrek on a Chevy chassis. There is what looks to be a newer 4 post isolator, I see no name brand or specs on it. I have been RV'ing long time and never had an isolato...
theoldwizard1's avatar
theoldwizard1
Explorer II
Feb 10, 2023
First. Battery "isolators" are old school. With modern vehicle charging systems, you will never be able to achieve 100% SOC on your house battery bank no matter what size wire you use.

Get rid of your isolator and replace it with a DC-DC charger. No, this will not charge you vehicle battery. Go buy an inexpensive battery tender or carry jumper cables that can go from your house battery bank to your vehicle starting battery or buy one of those hand held battery boosters.

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