Residential ESS refers to the construction of an energy storage system inside a home or community, which converts renewable energy such as solar energy into electrical energy and then stores it. While improving the utilization rate of renewable energy, Residential ESS can also reduce the cost of electricity by taking advantage of peak-to-valley price difference. Further more, Residential ESS is capable to provide backup power in the situation of a grid failure or power outage, ensuring the basic electricity needs of the family. Compared with other ESS solutions, Residential ESS has the features of modular design, flexible configuration, simple and convenient installation, etc. It is an integrated solution suitable for household use scenarios.