Specification: Capacity: 1KVA, 2KVA, 3KVAInput Normal Voltage: 230VACVoltage range: a) (120 300) VAC when Load0.95 Output Voltage: 220VAC+-1 % Frequency Range: 50Hz+-0.5% (Battery mode)Wave form: Pure Sine WaveTransfer Between AC Mode and Battery Mode: 0 msTransfer Between AC Mode and Bypass Mode: Transfer time: 4ms (typical 2.5ms) Distortion (Full Load) Linear load: >3% Overload capacity: >110% 30s turn to bypass mode; >150%, 200ms turn to bypass Load peak ratio: >1:3Battery Type: SMF/Tubular/Lead AcidBattery voltage: 24/36/48/72/96VDC