Generac 4582-2 Ultra Source 15,000 Watt Portable Generator (Discontinued by Manufacturer) 15,000-watt portable generator with enough power to run 4-ton A/C unit Powered by 992 cc Generac OHVI V-Twin industrial-grade engine 16-gallon fuel tank provides 10-hour run-time at half-load capacity Easy electric start; 9 outlets including 50 Amp high power outlet, 3 twist-lock plugs, and 2 GFCI protected duplex outlets This item is CARB compliant