Dimensions of Cummins-Onan 9,500-Watt Dual Fuel Portable Generator

Updated 09/08/2026 | Published 09/03/2026

Question:

what is the overall size of the unit?

asked by: John F

Expert Reply:

Hey John!

Once assembled, the Onan 9,500-Watt Dual Fuel Portable Generator # CM26MR measures 27-1/2" long, 26-1/2" wide, and 26-1/2" tall. With the handle extended for transport, the overall length increases to 40-11/16".

If you're planning to store it in an RV compartment, I'd recommend measuring both the interior depth and the compartment door opening to make sure you have enough room to get it in and out. You'll also want to leave adequate clearance around the generator for airflow and cooling when it's operating, so I would not run it inside a standard enclosed storage compartment unless that space is specifically designed for generator use.

Because of the 26-1/2" x 26-1/2" footprint, we don't currently have a generator carrier that will properly fit the # CM26MR. There are some larger carriers available elsewhere with around 30" of depth, which would be the direction I'd look if you want to carry it externally.

Where are you planning to store the generator and will it be on a trailer, truck, or RV?

expert reply by: Jerry B