With the development of society, electricity is more and more important to our life. Modern society also relies heavily on electrical powered appliances. When there is a power failure, the power to these devices is cut and they stop working. In order to solve these problems of power failure and no power available, ups inverters and ordinary inverters are designed. Both ordinary inverters and ups inverters are used to provide backup power for electronic equipment in the event of a power outage. But there are some differences between them, which will be mentioned in this article.