Solar batteries are energy storage units in which collected energy is saved. Lead batteries are most commonly used because they are cost efficient, low-maintenance and optimal for photovoltaicAbbrevatied.: PV. Technology that turns solar energy into electricity via solar cells. systems. High-end solar batteries have the following quality characteristics: Long lifespan, High energy density, Low self-discharge, Optimal charge acceptance, High operating security, Temperature resistant, Corrosion resistant. The lifespan of a battery is dependent upon multiple factors including surrounding temperatures and number of charge and discharge cycles the battery has endured (cycle stability). According to definition, the end of a battery’s lifespan is reached when capacity has sunk to less than 80%.