What Voltage Should A 12v Agm Battery Be. I have a number of 12V AGM batteries that I have fully charged and the resting voltage measured several days after charging was completed with no discharge ranged from 1296 to 133V. Available at Advance Auto Parts.
When checking the batteries at rest use these Voltage Landmarks. So if we can trust the battery university their table outlining state of charge for a 12 volt battery shows at 1189 volt the battery is at 0 charge. The voltage required to charge has to be larger than the voltage present so if the battery is at 12 v even 121 volts will eventually charge.
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All is well with the voltage youre seeing. View the most popular hydrometer on amzn. The charging voltage has to drive current backwards into the batteryso that it can interact with the chemistry of the battery. I am using an AGM deep cycle battery 130Ah 12V connected to 200W solar panels and a 500W inverter to power electrical devices such as fans laptops and lamps.
