Video: Working Principle of 20kW/64kWh Pure Off-Grid PV-ESS

This 20kW/64kWh pure off-grid PV energy storage system uses 36 pcs of 650W PV modules divided into 4 strings to capture solar energy, with DC power fed into the 20kW inverter. In daytime, PV power directly supplies household loads, and surplus power charges four 16kWh batteries. When no sunlight, batteries discharge and the inverter converts DC to AC to power air source heat pumps and appliances, achieving independent power supply without grid connection.