The electricity generated by photovoltaic arrays is direct current, but many loads require alternating current energy, such as motors, transformers, etc. The DC power supply system has significant limitations, making it difficult to change voltage and limiting the range of load applications. Except for special electrical loads, inverters are required to convert direct current into alternating current. Inverters, also known as power regulators or power regulators, are an essential part of photovoltaic systems. The working principle of the inverter is opposite to that of the rectifier. The main function of the photovoltaic inverter, as shown in Figure 18-1, is to convert the direct current generated by the solar panel into alternating current for household use. All the electricity generated by the solar panel must be processed by the inverter before it can be output to the outside world. Through a full bridge circuit, an SPWM processor is generally used for modulation, suppression, boost, etc. to obtain sinusoidal AC power that matches the lighting load rate, rated voltage, etc., for use by end users of the system. With inverters, DC batteries can be used to provide AC power for electrical appliances