Photovoltaic energy storage microgrid system u The project is located in Changxin Industrial Park, Dongguan. The project scale is 1MW/4.2MWH, 40-foot container, 400V access. When the energy storage system is connected to the grid, it can reduce peak loads and fill valleys. When it is off-grid, the energy storage system combines with photovoltaics to supply power to important loads in the park.