The noise tests were done by TheFitRV and you can see them here:
https://www.thefitrv.com/rv-tips/qui...0i-we-test-it/
They had two motorhomes, one with the 2800i and the other with the 4000 generator. They started each and at no load measured the nose using an iPhone app at 20' and 50' from the motorhomes. Then they started the A/Cs (same model on both) and did the same measurements. I suspect the A/C noise affected the results as much as the additional load on the generators.
The Onan QG 2800i was 8-9 dB under the 4000 model. Here is the data:
Standard RV Generator Onan QG 2800i
20 feet (no load) 67 dB 58 dB
20 feet (AC load) 68 dB 59 dB
50 feet (no load) 61 dB 52 dB
50 feet (AC load) 61 dB 53 dB
Insofar as fuel consumption, that comes straight from the Cummins data sheets and I seriously doubt that they are distorting it. I have used their engine data on their diesel marine engines and it was always right.
The cost of fuel isn't my biggest interest, but it is worth something. More important is the ability to dry camp in one spot while running the generator several hours per day to charge up a lithium battery bank and not run below 1/4 full where it will shut off.
And the EFI is also a big plus. Ethanol gasoline doesn't affect modern cars because they have EFI (electronic fuel injection) which totally contains the fuel and doesn't allow any air or moisture inside. So you don't have to add stabilizer or anything else for winter storage.
I believe that the Onan inverter generators will soon take over the RV market from their standard ones.
David
Thor Forums
