1.high frequency,online double conversion,IGBT 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 widely used in different fields, including electric power, science institute, national defense, telecom, finance, insurance, aviation, traffic, post service, public security, ...