Fully Charged 12v Agm Battery Voltage. The manufacturers charger guarantees that the AGM battery receives the required voltage without being undercharged or overcharged. Most solar regulators also have the technology to switch to float charge when the battery has reached full.
This is slightly higher than 12 volts on the battery side to provide resistance to the voltage in the battery cables. The peak charging voltage for Gel batteries is 23 to 236 volts per cell and for a 12 volt charger this works out to 138 to 142 volts which is lower than a wet or AGM type battery needs for a full charge. I used a 9 stage 15A smart charger to charge the batteries.
For instance a 6 volt battery will have 3 cells 3 x22 66 volts a 12v battery for a motorcycle for a motorcycle will have 6 cells 6 x22132 volts and so on.
12v_Battery_SoC_Tablejpg Lead acid 12 volt batteries will settle to 127 - 128 when fully charged with no loads and no charging source. An fully charged 12-volt AGM battery should typically have a voltage of 127V to 130V when not connected to a load or a charger such a voltage is called the open-circuit voltage. The typical charging voltage is between 215 volts per cell 129 volts for a 12V 6 cell battery and 235 volts per cell 141 volts for a 12V 6 cell battery. A fully charged standard AGM battery should have an output voltage of approximately 13 volts just higher than the 12 volts likely to be labeled on the side of the battery.
