Uninterruptible power systems are used in computer centers such as data centers.They are intended to protect load devices such as server equipment, data communication equipment and computers from power interruptions, and supply stable power. ITV UPSs with independent transformerless inverter technology have high efficiency. The output power of a single UPS ranges from 50 kVA to 540 kVA. Up to eight units can be connected in parallel, enabling them to flexibly cope with user's needs.