Exide EP series batteries are sealed lead acid maintenance free battery. They use AGM (absorbed glass matt and are valve regulated). Intended to be used in Solar setup or Home UPS or inverters

As per theory of a battery, a 26 Ah battery can give 26 amps for 1 hour or 1 amp for 26 hours. But that is the ideal battery. In reality it doesn’t work that way and the time depends on discharge rate.

Here is discharge pattern for Exide EP Plus Series batteries (26Ah to 2000Ah).

This pattern is based on data of new batteries discharged at an ideal temperature (27 degree centigrade).

For most cases I haven’t plotted below 10 as 12 volt batteries are considered fully empty at 10.8 – 10.5. And discharging to full capacity reduces battery life a lot. As per datasheet 100% discharge every time will give a battery life of 200 – 300 cycles, where 50% discharge always will give a battery life of 600+ cycles. And a discharge beyond 10.5 will decrease life or capacity drastically.

If a fully charged battery doesn’t follow the appropriate discharge curve closely then the battery life has got reduced. The faster the voltage drops the lesser is the life.

Please Note: This is a guide to be used for general purposes and not any critical operation. The discharge time will vary due to temperature, battery life and state of charge.

If you need the excel sheet for finding intermediate values or for quick and easy understanding, then please leave a comment below.