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Fortkentdad's avatar
Fortkentdad
Explorer
Jul 20, 2014

Two Similar 12V battery in parallel and other questions

Well I just bought a second battery for my RV. My other battery is only a couple of months old so both are new this year. The one battery didn't make it through an unplugged camping weekend so we de...
Almot's avatar
Almot
Explorer III
Jul 20, 2014
If they are both of the same specs, i.e. same charging setpoints - connect them in parallel. Preferably in a balanced manner like Pianotuna described.

And, I would not trust a trailer OEM wall meter to check the battery charge.

Definitely, I would avoid discharging it down to 1/4 of full capacity like you described. It's good to know that batteries prices can be that low, still there is no reason to treat them badly.

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