1. Product information 1.1 Introduction to the system principle box Figure 1-1 Block diagram Working mode The system supports grid-connected operation mode. ●Grid-connected operation The internal DC side of the energy storage cabinet is connected to the battery, and the external DC side is connected to the PCS. Cooperate with the power grid dispatching system, participate in the power grid voltage regulation and frequency regulation, and realize the peak shaving and valley filling of the power grid load. According to the selected operation mode, the battery can be charged and discharged with constant voltage, constant current and constant power.