Micro inverter and power supply method

A method for supplying power, applicable to a micro inverter comprising a primary-side power module, a power transformer, a secondary-side power module, a first auxiliary power supply, and a second auxiliary power supply, wherein:

• the first auxiliary power supply is connected to a direct-current power source and the primary-side power module, the primary-side power module is connected to the power transformer, the power transformer is connected to the second auxiliary power supply, and the second auxiliary power supply is connected to the secondary-side power module, and
• the method comprises:
• stepping down, by the first auxiliary power supply, an output voltage of a direct-current power source to obtain an output voltage of the first auxiliary power supply;
• supplying the output voltage of the first auxiliary power supply to a load in the primary-side power module;
• stepping down, by the second auxiliary power, the voltage, which is outputted by the power transformer through transforming an output of the primary-side power module, to obtain an output voltage of the second auxiliary power supply;
• and
• supplying the output voltage of the second auxiliary power supply power to a load in the secondary-side power module.