A solar battery is a rechargeable battery that stores energy generated from solar panels. Solar batteries work by converting the energy from the sun into a direct current (DC) voltage. This DC voltage is then stored in the battery. At night when there is no Solar Power generated by Solar panels, You can use the power stored in battery without paying your energy retailer for your electricity needs. Your Inverter will convert the DC voltage back into an alternating current (AC) voltage, which is then used to power the connected devices in your home.