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Rocky Mountain Generator Supply (RMGS) is the nation’s leading supplier of high-quality Cummins Onan generators. As an Authorized Factory Direct Dealer, RMGS is your single source for RV, Home, Portable, and Food Truck generators. RMGS offers a full range of Electric Generator solutions for Power Systems in a wide range of fuel sources; Natural Gas, Propane, Gasoline and Diesel fueled generators.