... dc ups the parametersInputCommercial GradeAC220±20%25%V,AC110±20%25%VFrequency: 47~63HzIndustrial GradeAC220±25%40%V,AC110±25%40%VFrequency: 47 ... DC500V.Working TemperatureCommercial: 0~45,20%~90%RH (non condensing)Industrial: -25~55,20%~90%RH (non condensing)Storage ... TemperatureCommercial: -20~65,10%~95%RH (non condensing) ...