The most important function of the photovoltaic inverter is to convert the direct current generated by solar panels into alternating current used by household appliances. All the electricity generated by solar panels can only be exported through the processing of the solar inverter. Through the full bridge circuit, SPWM processor is generally used to modulate, filter and boost the voltage, etc., so as to obtain sinusoidal ac power supply system end users matching the lighting load frequency and rated voltage。