Industrial and commercial photovoltaics are divided into two categories according to demand, for commercial and large industrial users, spontaneous self-consumption of electricity could be achieved through photovoltaics supporting energy storage. And for commercial buildings, hospitals, schools and other scenarios, peak shaving and valley filling effect could be achieved by installing non-photovoltaic supporting energy storage systems. Household energy storage systems are generally composed of energy storage systems and photovoltaic modules. At present, the household energy storage system market is mainly dominated by the split machine of energy storage battery + inverter, but the development trend of the high-end market is an integrated machine.