This product is a DC Energy Storage System developed and designed by Zhongrui Green Energy Technology (Shenzhen) Co., Ltd. The system mainly cooperates with low-voltage solar power plants to increase sales or self-use. It is mainly composed of photovoltaic controller, DC/DC converter, battery modules, master control module and power distribution module. The battery module adopts lithium iron phosphate with high safety performance and long life. It has the characteristics of high integration, substitution, intelligence, and convenient installation. It also supports parallel operation of multiple systems, to fulfill larger storage capacity and load capacity. The system output voltage can be set arbitrarily from 250Vdc-400Vdc to meet the requirements of the operating voltage range of various photovoltaic inverters on the market.