Acceptable Low Voltage for an AGM Battery?


What is the minimum voltage permissible to draw the house AGM batteries down to, and what would be the preferable minimum for longer battery life? - Gerry


Considering that you have a battery monitor, best is to use amp-hours versus basing yourself with voltage to determine battery capacity. With an AGM battery you can easily bring it to 50% of capacity and even down to 30% of capacity. If you had to go with voltage, this would be 12.2 VDC at 50% or around 12 VDC at about 30-40% of capacity. But remember voltage fluctuates depending on load.  – Jeff