Why Engine-Driven? Construction job sites, field fabrication, maintenance/repair and weather emergencies demand generator and welding power in locations where electrical outlets aren't available. In these instances, professionals, farmers/ranchers and homeowners rely on the output of an engine-driven welding generator. These "two-in-one" machines feature a gas-, diesel- or LP-driven engine that produces 3,500 to 20,000 watts of 120/240 VAC generator power (depending on the model) to run tools, lights, appliances and motors. They also produce Stick, TIG, MIG and flux cored outputs, so you can tackle every field welding challenge.