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profdant139's avatar
profdant139
Explorer II
Nov 25, 2020

Battery failure puzzle: voltage good, little power

I have (or had!) two five year old group 31 NAPA deep cycle marine batteries, rated at 110 amp/hours each. They were not hooked up in parallel or series -- I use one at a time, swapping them out as n...
time2roll's avatar
time2roll
Nomad
Nov 25, 2020
With the sudden drop in voltage cutting out the fridge I would have suspected you to measure 10.5 or less volts as I believe the fridge should operate down to this level. I would keep an eye out for a loose connection by measuring voltage at the fuse panel or at the fridge itself. Nothing should complain at 11 volts let alone 12.1+

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