Interstate Batteries BPS 120/240V 7200W Surge Reusable Inverter Power Supply w/8-Interstate Batt Logo

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Posted on Nov 23, 2009
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Howtowire 2 12v batteries to an rv?

How to wire 2 12v batteries to an rv?
I have three red colored hookups? Onemust go to an inverter.

  • Anonymous May 11, 2010

    The 2 batteries are wired positive to positive and negative to negative or you get 24VDC. Your inverter, starter and instrumentation might not like that. I suspect 2 of the 3 red connections go to voltage regulators to prevent over charging either battery, the third feeds the inverter and should not matter which positive terminal it connects to.

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  • Expert 332 Answers
  • Posted on Mar 05, 2010
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Wire one hot lead to one battery and one neg lead to the same battery

then wire second battery to the first one

your inverter lead goes to the positive post of the first battery

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