Surely there must be a way to change the cut-off/ shut-down voltage of 19.8V
?
It is either changing a resister or re programming the EEPROM
?
Without an external battery protect circuit there are no way that a LEAD/AGM/Gel & even a Lithium will last!
- LEAD acid 50% of DOD is around 24.4V
- Gel 50% of DOD is around 25V
Gel batteries just don't last with this inverter, as soon as it go below 24V it done for.
I build a battery protect circuit using a Victron 12/24 65A battery protect & 24VDC 80A relay, however the Victron is stupid and can only be set to a max off 24V cut off, so not good for either Lead/AGM or Gel options but a lot better than the 19.8V inverter cut off