... solar inverter output the pure sine wave, nice quality, and little distortion. Input voltage including 12V, 24V, 48V ... , over input voltage; input low voltage, output over loading and short circuit, etc. 4) Cold start solar inverter. ... air (Variable specd fan)Insulation1500VAC 1miaProtectionOver heat,Over loading,Short,Under/ Over voltageProtection ClassIP25Display LEDInverter, AC input ...