One Battery-Box Premium HVM energy storage consists of 3 to 8 HVM battery modules, which are connected in series to achieve a usable capacity of 8.3 to 22.1 kWh. In addition, the direct parallel connection of up to 3 identical Battery-Box Premium HVM energy storage units allows a maximum capacity of 66.2 kWh. Scalable by adding HVM modules or parallel HVM sets.