Tips for maintaining inverter battery.

1. Charging cutout should be between 13.9 V to 14.2 V depending on Battery
2. Specific Gravity between 1190 - 1210
3. No salt [lead sulphate] deposited on terminals
4. Battery is kept clean
5. Jelly be applied on terminals

Also came across this: VX-6, a battery additive to remove sulphate.