Quote:
Originally Posted by Papa2675
Hi, I also was wondering if I can add a 3rd battery to the house batteries? Their is a 3rd slot for a battery soo? And I am using the correct deep cycle batteries, thanks!!
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If they are all 12 volt. If the 2 you have are 6 volt then you'd need to buy 2 new ones, 2 wired in series & each pair wired parallel to equal 12 volts, 3 - 6 volts won't work.
It would be best to wait til the original batteries are due to be replaced so that you'd have 3 identical batteries, mixing 2 old batteries with 1 new one will only weaken the new one faster shortening it's lifespan.