YouSolar’s new 100 V LFP battery pack. The battery stores 5.12 kWh and weighs 55 kg. The energy density of the cells is about 150 Wh/kg. Brackets to hold the cells, wiring, chassis, and control electronics reduce the energy density to 93 Wh/kg. A good figure of merit for the energy density of LFP packs is 100 Wh/kg.