[PNW Fireguy]

Your specific battery should have a spec sheet available online that will provide you with its charge curve. In addition just for information purposes SOC is the least accurate means of measuring your batteries capacity. While AGM and FLA batteries have a steeper charge curve SOC is still and estimation based upon battery voltage. This is nearly impossible to do with lithium batteries as the charge curve is so relatively flat.



Keeping track of actual AH in/out is a far more accurate means of measuring your batteries SOC/DOD. In order to do that users generally install a shunt and make sure that all loads are connected downstream of the shunt.