How many modules does the UPS consist of in principle?

UPS is an uninterruptible power supply. It connects the storage battery (mostly lead-acid maintenance-free battery) with the host computer, and converts DC power into commercial power through module circuits such as host inverter. Mainly used to provide a stable and uninterrupted power supply for a single computer, computer network system or other power electronic devices such as solenoid valves, pressure transmitters, etc.