PV inverter

UPS is an uninterruptible power supply, which 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. 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) Immediately, the UPS will continue to supply 220V AC power to the load by switching and converting the DC power from the battery to the load, so that the load can maintain normal operation and protect the software and hardware of the load from damage. UPS equipment usually provides protection against over-voltage or under-voltage.

Here shows the UPS electrical topology, in which the DC/AC inverter part  is from YIXING IGBT: