Continuous Power(W): 1500 Wave Form: : modified sine wave Operating Voltage: (21v±0.6v)-(31±0.6v) Rated Input Voltage(DC): 25.6v-26.4v Rated Output Voltage(AC): 210-230 Output Frequency: 48-52 Conversion Efficiency: g85% Static Current(On Rated Valtage Condition): 0.5A Low Input Voltage Warning: 20.4v-21.6v Low Input Voltage Shut Off: 18.4v-19.6v Over Input Voltage Shut Off: 30v-33v Automatic Recover Voltage: 23.4v-25.6v Over Temperature Protection: 60-70