Uninterruptible power supply (UPS) equipment

The utility model relates to UPS (Uninterrupted Power Supply) equipment, which comprises a power supply body, a charging device and an alarm device, wherein the power supply body comprises a main circuit and a bypass which are arranged in parallel, the main circuit is provided with a power-down power supply and an inverter which are arranged in series, and the power-down power supply comprises a rectifier, a charger and a basic battery pack which are connected in series; the electricity supplementing device comprises expansion battery packs and wiring terminals; the expansion battery packs are divided into three groups which are respectively connected in series and then are correspondingly connected with a pair of wiring terminals; the alarm device comprises a power failure monitoring module, a basic storage battery pack monitoring module and a wireless communication module. According to the UPS uninterruptible power supply equipment, power failure monitoring and storage battery state monitoring are set in co