Grid connection and disconnection device

The utility model relates to the field of new energy photovoltaic energy storage power supplies, in particular to a grid-connected and off-grid device, which comprises a mains supply cabinet, an energy storage circuit and a load circuit, the mains supply cabinet, the energy storage circuit and the load circuit are electrically connected, and the energy storage circuit comprises a photovoltaic inverter and an energy storage module. The load circuit comprises an energy storage converter and a load module, the energy storage circuit is provided with an in-and-out combiner box, the output end of the in-and-out combiner box is connected with the photovoltaic inverter, the load circuit is provided with an oil engine, the output end of the oil engine is connected with the load module, the energy storage circuit is provided with an EMS system module, and the EMS system module is connected with the energy storage converter. Through the arrangement of the photovoltaic panels, solar energy can be conveniently converted