Microtex Stationary VRLA OPzV Cells are maintenance free gel lead - acid type with long life In applications with high requirements of operational safety and bridging times of 1 h to more than 10 h 20 years in standby float operation at 27 176 C Maintenance free No topping-up water during the operational life Microtex OPzV cells are maintenance free Gel lead-acid type with long life In applications with high requirements of operational safety and bridging times of 1 h to more than 10 h the Microtex OPzV is the right choice Microtex Stationary OPzV Cells are used in Telecommunication Sectors for Emergency Lighting for Microwave Radio and Solar Photovoltaic Systems and also in Power Generating Plants Charging IU-Characteristic- Imax without limitation U 2 25V cell -1 between 10 176 C and 45 176 C U T -0 003 V K Float current 20-30 mA 100 Ah Discharge Characteristics Reference temperature 25 176 C Initial capacity 100 Depth of discharge DOD normally up to 80 Deep discharges More than 80 DOD or discharges beyond final discharge voltages based on discharge rate have to be avoided