Originally Posted by mpotapa
I thought about switching to 6vs but I think I'll just carry a spare 12v battery in my truck and just keep it maintained. I bring my voltage tester and test them daily. What will 50% of a 12v battery read on my meter? 12.06?
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Measuring the remaining capacity in a battery bank cannot be done with any useful degree of accuracy using voltage readings. Battery manufactures recommend you let the battery achieve equilibrium by resting 24 hours before observing the voltage. Resting means zero charges in and zero charges out. There are those people who claim waiting 4 hours is enough. Either way is impractical to a boondocker. Then there is the matter of battery temperatures. Higher temperature raises the open-circuit voltage, a lower temperature lowers it, throwing another curve into the game.
is only practical method to determine your bat bank status.