AGM Voltages for Fully Charged and Flat – State of Charge

A quick and easy method for determining the amount of charge left in your caravan batteries is to look at the voltage. This can be via a handheld voltmeter, or multimeter, or a built in volt meter.

State of Charge Sealed or Flooded Lead Acid Gel battery AGM battery
100% 12.70+ 12.85+ 12.80+
75% 12.40 12.65 12.60
50% 12.20 12.35 12.30
25% 12.00 12.00 12.00
0% 11.80 11.80 11.80