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steveexplorer's avatar
steveexplorer
Explorer
Sep 21, 2013

Which is better - (3) 12v batteries vs (2) 6v batteries

I am looking to replace an old coach battery with AGM batteries for boondocking usage. I have space for (3) 12 volt group 24s without having to do any modifications, but could also just use 2 of the battery spaces for (2) 6 volt batteries.

So I am evaluating which combination produces the most amp hours at the best price? And which brand to buy?

I am looking into using solar panels to charge the batteries. The electric loads are modest. I expect to run Fridge, hot water, and cooking on propane, and the air conditioner on generator.

Your opinions and experience are greatly appreciated.

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  • Gale_Hawkins's avatar
    Gale_Hawkins
    Explorer
    Sep 21, 2013
    Welcome to RV.NET

    If the 24's are 75 AH rated and the 6 volts 225 AH rated I would expect the 6v option would out perform because a lot of physical/electrical issues getting three batteries that will not fight when laced together in such a manner to yield 12v output. Other wise 225=225 AH on paper.

    You may want to look at your full needs in light of AH and the cost per AH. We found more ban for the buck with our old MH to spend the money on tires, roof, cooling system to make it road worthy to the max. Solar is nice but so are a lot of other things. Keep up with hours you run your generator currently and associated costs and AH consumer is one approach.

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