How to stop inverter from charging battery using grid power and charge battery using only solar panels?
UTL`s SMU has the capability to charge a battery that goes in deep discharge condition. It can charge the battery if the battery voltage during discharge drops up to 8V per battery.
It uses four stages to charge the battery i.e. Boost, Absorption, Float and Equalization.
This feature protects the battery from being over charged.
Read your manual how to set these thresholds.