Commercial diesel generators are designed for emergency backup or short-term peak power supply scenarios such as shopping malls, hotels, hospitals, and schools. The power range is mostly 20kVA~300kVA. The generator sets have a compact structure, small size, lower operating noise, and focus more on stability and low emissions. They mainly power conventional loads such as lighting, air conditioning, and computers. Equipped with ATS, the automation functions are relatively simple, and the operation and maintenance are easy.