Air cooled compact and heavy duty electric arc welding machine with constant current delivery by operating core magnetic shunt design Accurately rugged and reliable industrial & outdoor welding application without any electronic circuitry for better service existenc Specifications Duty Cycle 20 Engine Power Electric DC Input Power Volts 230 Maximum amperage output amps 235 Minimum amperage output amps 45 Rated Output Volts 72 Output range 45 Amp 235 Amp AC and 45 Amp 185 Amp DC Max OCV is 72 VAC 63 VDC 50 AC at 150 Amp 35 DC at 135 Amp