How Many Volts Should A Fully Charged Battery Have. Battery life is directly related to keeping your batteries fully charged. Any voltage above 129 volts is a good indicator that your battery has excessive voltage.
Answer 1 of 2. The sealed AGM and Gel-Cell battery voltage full charged will be slightly higher in the 128 to 129 ranges. How many volts should a good 12 volt battery read.
Digital Voltmeters should read as the voltage is shown in this document.
That is 24 Volts for a 24 Volt system. So a 12volt battery will measure at about 129 volts when its fully charged and about 114 volts when it is fully discharged. Turn on a big load like the microwave if you have a big inverter that will power it and voltage dives down into the 115-118 volt range even on fully charged batteries. Although a battery is called 12 volt battery its voltage varies from about 12.
