Convergence Power Systems Pvt. Ltd. Offers Single Phase Online Uninterruptible Power Supply-UPS System. Convergence Power Systems Pvt. Ltd. Is ISO 9001:2008 registered. The Single Phase Online Uninterruptible Power Supply-UPS System of SXI Series ranges from 1KVA to 15KVA. This UPS has Single Phase Input Single Phase Output that gives, true sine wave output at all times, offers guaranteed compatibility with all equipment types without any restrictions of motorized or compressor based load. These models comes with Built in Galvanized Isolation Transformer