Power :300W DC MAX input current:20A AC MAX output power:300w DC Max Input open circuit voltage:60VDC Recommend use solar panel:400Wp Maximum output power factor:99% DC input voltage range:22~60VDC AC output voltage range:120V version90~140VAC;230V versions DC input Reverse voltage protection:Fuse AC frequency range:55Hz~63Hz/ 45Hz-53Hz Output current total harmonic distortion:THDIAC