1.high frequency,online double conversion,IGBT 2.N+X redundant,Hot-swap,green UPS 3.high reliablity,availability,efficiency SICON-EMI Power System ... good examples.SICON-EMI Modular UPS is the new conception modular UPS, features with high efficiency (≥95%), high stability (N+X redundancy ... . And the maintenances of the UPS is very easy, just with the power module changed. pure sine wave online UPS