The home energy storage system is similar to a micro-energy storage power station, and its operation is not affected by the pressure of the power supply. In addition to being used as an emergency power supply, the household energy storage system can also save household power expenditure because it can balance the power load. Although the current market demand for household energy storage systems is more out of the people's need for emergency backup power supply, in the view of people in the industry, the use of household energy storage systems can combine new energy power generation systems such as solar energy, promote the industry of new energy and build a smart grid.