... 0.97Bypass Voltage Range Max.voltage: +15%(optional +5%,+10%,+25% )Min. voltage: -45% (optional -20 ... %,-30%)Frequency protection range: ±10%ECO Rangesame as the bypassHarmonic Current ≤5%(100%non- ... 2%Output FrequencyUtility Mode±1%,±2%,±4%,±5%,±10% of the rated frequency(optional)Battery Mode ... 10min,≤150%last 1min,≥150%shut down UPS immediately.THD≤2%EfficiencyECO mode≥98%;Normal mode ...