In common there are the following types acid-lead batteries:

  • Gel batteries
  • AGM batteries
  • Flooded batteries
  • OPsZ (Long life flooded tubular plate batteries)

The OPsZ batteries are the most preferable ones for Solar systems due their lifetime expectations

  • Design life: >20 years at 20ºC, >10 years at 30ºC, >5 years at 40ºC and a Float design life @ 70ºF/20ºC 20 years,
  • Cycle design life @ 80% discharge 1500
  • Cycle design life @ 50% discharge 2800
  • Cycle design life @ 30% discharge 5200

Under the condition that the battery is fully loaded (completed absorption charge till float) before the next discharge take’s place.