The PRS-7563 power conversion system(PCS) and its optional accessories are the link between the power grid and electric energy storage equipment, which can realize conversion between AC power and DC power, and monitor data such as voltage, current, power, and power temperature at the AC end and DC end of energy storage converter. It plays the role of charging and electric energy feedback, it is key equipment in the energy storage system, and it provides preconditions for the vigorous development of distributed power generation systems. In the meantime, as a controllable energy storage power source in the micro-grid, PCS solves the contradiction between the large power grid and the distributed power supply, so that the micro-grid can not only be connected to the large power grid, but also can operate independently by disconnecting from the main grid when the power grid fails or when there is requirement for disconnection, which can greatly improve the safety, stability and economic efficiency of the power system.