Basically UPS cuts of charging when its charging votage reaches about 12.6. After cut off, fully charged battery remains at 12.3-12.4 volts. I have checked by changing the battery same thing happened. My other UPS cuts off at around 14V and after full charging, battery is at around 12.8-12.9V. I want to increase the cut off voltage from 12.6 to around 14V so that battery can get fully charged before charging gets cut off.