Big Dave2 Posted June 16, 2016 Share Posted June 16, 2016 I want to hook up 2 12 volt batteries in parallel this weekend to make sure I have enough duration. Can I just set the 2nd battery next to the rv battery and run a wire from the red to the red and one from the black to the black? Quote Link to comment Share on other sites More sharing options...
leech~~ Posted June 16, 2016 Share Posted June 16, 2016 17 minutes ago, Big Dave2 said: I want to hook up 2 12 volt batteries in parallel this weekend to make sure I have enough duration. Can I just set the 2nd battery next to the rv battery and run a wire from the red to the red and one from the black to the black? That's more or less what I did on my last Motorhome. Went all the way to Yellow stone in the spring using the heater, frig, and VCR and never lost power. Big Dave2 1 Quote Link to comment Share on other sites More sharing options...
delcecchi Posted June 17, 2016 Share Posted June 17, 2016 That will do it Dave. I would use fairly thick wire, since it will be carrying half of the load current. Big Dave2 1 Quote Link to comment Share on other sites More sharing options...
Big Dave2 Posted June 17, 2016 Author Share Posted June 17, 2016 I bought 2 battery lead cables and I'll hook the second battery up when I get where I'm going tonight. Thanks! leech~~ 1 Quote Link to comment Share on other sites More sharing options...
smurfy Posted June 20, 2016 Share Posted June 20, 2016 I charge my batteries hooked together that way!!!!!!!!!!! upnorth 1 Quote Link to comment Share on other sites More sharing options...
Big Dave2 Posted June 25, 2016 Author Share Posted June 25, 2016 I ended up having plenty of power with one battery and never needed to hook up the second one but now I have the cables and know how to do it if I need to. Quote Link to comment Share on other sites More sharing options...
upnorth Posted July 20, 2016 Share Posted July 20, 2016 I know the is a little late in the game, but I have to series 29 batteries in a box that I cobbled together from 2 battery boxes and leave them that way all season. The few exra $$ is little compared to not have to worry about running out of juice over a weekend, especially a rainy weekend where you spend more time in the RV. Quote Link to comment Share on other sites More sharing options...
Powerstroke Posted August 22, 2016 Share Posted August 22, 2016 Just wire them up now so they share the load instead of having one battery that does all the work and one that sits there. They will charge and discharge together. If you want to keep them seperate, you can buy a marine battery switch that lets you disconnect one or both of the batteries as needed. Quote Link to comment Share on other sites More sharing options...
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