The Classic OCSM range is an enhancement of the OPzS series which uses the CSM (Copper Stretched Metal) patent developed in 1978. It was adapted for stationary applications that need remarkable energy transformations or short-term discharges. OCSM’s unique features include positive tubular plates that provide great stability and copper stretch mesh as negative-electrode core. The conductivity of copper reduces internal resistance and improves performance during (dis)charging. OCSM’s main applications are power plants (approved for nuclear) and load leveling.