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Old 07-16-2016, 11:42 AM   #1
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Join Date: Jun 2016
Location: Norway
Posts: 3
Default Second battery switch

My Chevy G30 has 2 batteries, one in the engine bay and the second one approx under the driver seat.
I just bought a battery isolator switch and I want to separate the two batteries when the engine is off or when camping. The second battery -disconnected from the first one- will provide me the electricity to the 12v sockets and to an inverter, without dropping the first battery. The second step will be to add a solar panel that gives power to this batter, for the long stops or holidays.

My question is, are there any "don't do this way" recommendations?
I know I can't drop all the power from the battery, so I have a volt indicator connected

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Old 07-16-2016, 03:24 PM   #2
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Join Date: Oct 2006
Location: New Brunswick, Canada
Posts: 7,824

There's so many ways to do stuff.

I'd recommend focusing on the basics like making sure you have really good low resistance connection points. That means no corrosion / oxidation, good crimps. Also, use adequate or even better than adequate wire gauge to minimize voltage drop and maximize current carrying ability.

A bi-directional automatic relay might be had for the same or lower cost than a typical isolator. Isolators typically cause some voltage drop which makes it more challenging to get the house battery fully charged. I'm pleased with the low cost relay I posted about here:
Two bikes on sliding cargo box: & 1997 GMC Savana 6.5L Turbo Diesel Custom Camper Van Specifications:
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