The main inverter is a critical component that provides power, therefore their operation, performance, and reliability are crucial for maintaining uninterrupted power supply. This application manual focuses on rectifier diodes, switch diodes, and TVS diodes, which can help ensure the reliability and operation of the frequency converter. By efficiently converting and optimizing power output, the main inverter can improve the efficiency and reliability of the entire photovoltaic power generation system, ensuring that the photovoltaic power generation system is safely and stably integrated into the grid, while complying with the specifications and standards of the grid.