Battery Pack Energy Storage System： The Deep Cycle GEL (GEL) series is designed for frequent cycle charge-dischargeapplications in extreme environments. Through the use of a rugged grid, high purity lead, and patented GEL electrolytes, the Gel family has excellent recovery after deep discharges under frequent cycle discharges and can deliver up to 400 cycles at 100% DoD. Suitable for solar energy, cable TV, Marine, RV and deep discharge UPS.