Photovoltaic and commercial power source identification system

The utility model discloses a photovoltaic and commercial power source identification system, which belongs to the technical field of energy storage and comprises a PV photovoltaic assembly, a commercial power grid, an energy storage battery and a user side load. The output end of the PV photovoltaic module is electrically connected with a direct-current step-down topology circuit, the output end point of the direct-current step-down topology circuit is connected with an energy storage battery and an isolation step-up inversion topology circuit, and the output end of the isolation step-up inversion topology circuit is electrically connected with the user load; the output end of the commercial power grid is electrically connected with an isolation step-down rectification topology circuit, and the output end of the isolation step-down rectification topology circuit is electrically connected with the input end of the DC step-down topology circuit. According to the scheme, improvement is carried out on the basis