Briggs & Stratton 10,000 Watt Pro Series Generator, Model Number: 30556 Power For Your Crew. Our most powerful Pro Series generator! Powered by a commercial grade Briggs & Stratton Vanguard V-Twin OHV engine for extreme conditions. Volts 	120/240 , Gross Horsepower* 	18 Start Type 	Pull/Electric Consumer Warranty (Product): 2 Year Limited Commercial Warranty (Product) : 90 Day Limited