... 2.N+X redundant,Hot-swap,green UPS 3.high reliablity,availability,efficiency SICON-EMI Power System CO., Ltd. Is one ... of the top modular UPS manufactures in China. They are ... 15KVA, 20KVA MODULAR STRUCTUREThe UPS system is real modular structure. Each power module functions as a unique UPS uniteRedundant updateable system: N+ ...