A solar battery, also known as a solar energy storage system, is a rechargeable device that stores excess electricity generated by your solar panels for later use. It helps homeowners and businesses increase solar self-consumption and energy independence. A complete solar energy storage system typically includes solar panels, a hybrid inverter, batteries, and an. Solar Battery Energy Storage Systems (Solar BESS) capture energy from the sun and store it as chemical, thermal, or mechanical energy. Like batteries in your smartphone or laptop, BESS batteries are charged with the energy, in this case from the sun, which is then stored and distributed as. These solar battery systems store the extra power generated by solar panels during sunny hours and release it when the sun isn't shining.