Which 12.0 volt?
"Everybody" says to not drain 12 volt batteries below 12.0 volts. Operating a small refrigerator drops the apparent voltage to 11.9 volts which recovers to 12.5 volts between cycles. Too low or can ...
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"not going below 12.0 volts" is the resting voltage. You can only accurately measure it when the batteries are neither being discharged or charged and have had some time to sit there unused.
