The new SPH series three-phase high-voltage energy storage inverter of Kunlun Energy storage supports multi-machine parallel operation, which is not only suitable for family residence, but also can be widely used in industry and commerce. The electricity cost can be reduced by peak-cutting and valley filling, and the high degree of autonomous energy dispatch can be realized. The series includes six power segments of 4/5/6/7/8/10kW, which can be perfectly matched with the battery series in the voltage range of 100 to 550V. The grid-connected end has 1.1 times AC continuous overload output, and the off-grid switching time is less than 10ms, which is very friendly to important household loads, supports DC arc protection, each phase is independent anti-countercurrent control, and AC and DC standard surge secondary protection escorts safe electricity consumption.