Auxiliary power source PV inverter starting circuit

Example embodiments provide a photovoltaic inverter to start the auxiliary power supply circuit of the present invention, the start-up circuit comprising: a power absorbing circuit for absorbing the solar panel the power output to the DC bus, and when the solar panel MPP greater than or equal to the auxiliary power supply starts, stops absorbing the solar panel the power output to the DC bus; activation control circuit, for charging the capacitor to a first power absorption circuit is turned off and the DC link start the auxiliary power supply voltage, wherein the output voltage of the solar panel is not, the output power of the solar panel is greater than the starting power for the auxiliary power source when the first voltage. Embodiments of the present invention, the auxiliary power supply before starting off power absorbing circuit chip and start the auxiliary power source when the output power of the solar cell panel is larger than the output power of the auxiliary power supply, thereby avoiding the problem of the auxiliary power supply forced to close.