UPS stands for Uninterruptible Power Supply, which is an uninterrupted power supply containing energy storage devices. It is mainly used to provide uninterrupted power supply to some equipment that requires high power supply stability. When the mains input is normal, the UPS will stabilize the mains and supply it to the load. At this time, the UPS is an AC-type voltage stabilizer, and it also charges the battery in the machine; when the mains is interrupted (accidental power failure), the UPS immediately transfers the DC power of the battery to the load through the inverter switching method to continue to supply 220V AC power to the load to maintain normal operation and protect the load software and hardware from damage. UPS equipment usually provides protection against over-voltage or under-voltage. Uninterruptible power supply (UPS) is a system device that connects the battery with the host and converts DC power into mains power through the host inverter and other module circuits. It is mainly used to provide a stable and uninterrupted power supply to a single computer, computer network system or other power electronic equipment such as solenoid valves, pressure transmitters, etc.