Lithium batteries work by moving lithium ions between a positive side and a negative side to store and release energy. When they charge, the ions move one way and “fill up” the battery; when the home needs power, the ions flow back and create usable electricity. Because this process is fast and efficient, lithium batteries can store a lot of energy in a compact space, recharge quickly, and last for many years. That’s why they are ideal for home energy storage—saving money by storing cheap electricity at night and using it during expensive peak hours.