A photovoltaic inverter is an electronic device that converts the direct current generated by solar cell modules into alternating current with adjustable frequency. Since the grid-connected power supply needs to meet the quality requirements of the grid, the inverter adjusts the voltage waveform through the power electronic switch for the grid or for load use, which can directly affect the power generation efficiency of the solar photovoltaic system.

According to the application scenario and power, photovoltaic inverters can be divided into centralized inverters, string inverters and microinverters