Solar inverters, also known as power regulators and power conditioners, are an essential part of photovoltaic solar power generation systems. The main function of the photovoltaic inverter is to convert the direct current generated by the solar panel into the alternating current used by household appliances. All the electricity generated by the solar panel must be processed by the inverter before it can be exported to the outside world. [1] Through the full-bridge circuit, the SPWM processor is generally used to modulate, filter, boost, etc., to obtain sinusoidal AC power that matches the lighting load frequency and rated voltage for use by the end users of the system. With an inverter, DC batteries are used to provide AC power to appliances.

The solar AC power generation system is composed of solar panels, charge controllers, inverters and batteries; the solar DC power generation system does not include inverters. The process of converting AC power into DC power is called rectification, the circuit that completes the rectification function is called a rectifier circuit, and the device that realizes the rectification process is called a rectifier or rectifier. Correspondingly, the process of converting DC power into AC power is called inverter, the circuit that completes the inverter function is called inverter circuit, and the device that realizes the inverter process is called inverter equipment or inverter.

The core of the solar inverter device is the inverter switch circuit, referred to as the inverter circuit. The circuit completes the inverter function by turning on and off the power electronic switch. The on-off of power electronic switching devices requires certain driving pulses, which may be adjusted by changing a voltage signal. Circuits that generate and condition pulses are often called control circuits or control loops. The basic structure of the inverter device, in addition to the above inverter circuit and control circuit, there are protection circuit, output circuit, input circuit, output circuit and so on.