Onan is a wholy owned subsidary brand of Cummins Power Generation, a world leader in the design and manufacture of generators, power systems, gasoline engines, and custom power for market applications. The Cummins / Onan commercial power systems and Onan brand consumer products are available around the world through the Cummins sales, distrobution, and service network. Cummins Power Generation, a subsidiary of Cummins Inc. manufactures and markets consumer and commercial power generation products including Onan generators

The Onan brand contains the following product sets:

Portable Generator Sets: gas generator sets from 2000 to 6000 watts .
Onan Home Standby Generators: generator sets from 12 to 20 kW
Marine Generator Sets: diesel fueled generator sets from 5 to 95 kW.
Commercial Vehicle Generator Sets: gas and diesel generator sets and PTO (Power Take Off) generators from 2.3 to 40 kW.