The 8KWh LiFePO4 household energy storage battery has high energy utilization rate with sufficient usable capacity and an energy conversion efficiency of about 95%, greatly reducing power loss during energy storage. It supports stable constant current charge and discharge with steady output voltage, adapting to various household loads such as refrigerators, air conditioners and lighting with reliable power supply. Users can store power during off-peak hours and use it during peak hours based on time-of-use electricity prices to cut power bills significantly. It can also store self-generated photovoltaic power, reduce reliance on the grid and maximize clean energy utilization, meeting household demands for energy conservation and low-cost power consumption.