Generac 7128 GP Series 3500iO Portable Generator with Open Frame, 3000 WattsThe Generac GP3500iO open frame inverter featuring new, advanced PowerRush technology delivers over 50 percent more starting capacity for tools and other motor driven equipmentso you can do more with less.* Both quieter and lighter, it's the ideal portable solution for camping, powering your RV essentials or tools. PowerRush technology delivers over 50 percent more starting capacity for tools and other motor driven equipmentso you can do more with