1. Input DC current: The photovoltaic inverter first receives DC current from the solar panel. The magnitude and direction of this DC current depend on the working state and light intensity of the solar panel.

 2. MPPT maximum power point tracking: The electronic circuit inside the inverter will calculate the maximum power point (MPPT) of the solar panel in real-time based on its working state and light intensity. The inverter will adjust its own circuit to maximize the output power of the solar panel.

 3. Current conversion: Once the maximum power point of the solar panel is determined, the inverter will use a switching power circuit to convert the direct current of the solar panel into alternating current of the same frequency and voltage as the local power grid.

 4. Filtering: The inverter will filter the output AC power to remove any unnecessary high-frequency interference signals and ensure that the ripple of the output current is small enough.

 5. Feedback control: The built-in feedback control system of the inverter can monitor the waveform of the output current and adjust the frequency and phase of the output current if necessary to ensure that the AC output of the inverter is synchronized with the local power grid and maintain the stability and reliability of the power grid.

 6. Output AC power: Finally, the inverter will output the processed AC current for use by the local power grid or household, commercial, or industrial electrical equipment.