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The Cummins Onan rv qg4000 - 4.0kw rv generator (gasoline) is available for purchase today.

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Cummins Onan RV QG4000 - 4.0kW RV Generator (Gasoline)

(Based on expert analysis, manufacturer ratings and customer reviews)

3.3 out of 53.3 out of 53.3 out of 53.3 out of 53.3 out of 5
9 Reviews
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Run Watts
Rated Watts
4.0 kW Gasoline Powered RV Generator (Model 26100)
Enough power to run a 15,000 BTU AC (30A 1-Pole Breaker)

Designed For Use With Multiple Applications
Fifth wheels, travel and sport utility trailers

Cummins Onan 4-Cycle OHV Engine (.5 Gal/H @ 1/2 Load)
Provides quiet operation w/ excellent fuel efficiency

Microprocessor Controlled
Digital voltage regulator prevents damaging voltage spikes
Provides added protection from overloads and faults

Sound-Attenuating Enclosure
Lowers noise levels while providing cross-flow cooling

Control Panel w/ LED Status Indicator Light
Start-Stop/Prime rocker switch
Provides set diagnostics

USDA Forest Service Approved Spark Arrestor Muffler

NON EVAP MODEL- Generator Fuel Must Come from Chassis Fuel Tank

Added Features
Magnetic circuit breaker & fused DC circuits (to protect wiring)
125" generator set output leads

3 Year / 2000 Hour Warranty (Please See Warranty Sheet)
  Model Number:RV QG 4000
 Manufacturer:Cummins Onan
 Brand:Cummins Onan
 Starting System:12-Volt Button Start
 HP/CC:304 cc
 Consumer Engine Warranty:3 Years
 Commercial Engine Warranty:Not Available
 Engine RPM:3600 RPM
 Cast Iron Sleeve:Yes
Product Specs
 Voltage120 Single-Phase
 Frequency:60 Hertz
 Auto Voltage Regulation:Yes
 Fuel TypeGasoline
 Rated Amps:33 Amps @ 120 Volts (Single Phase)
 Min. Air Inlet (Front)7.2" x 5.1"
 Min. Air Outlet (Bottom)9.6" x 3.8"
 Weight:172 Lbs. (78.02 kilograms)
 Dimensions:30"L x 19.7"W x 14.4"H
(76.20 x 50.04 x 36.58 cm)
 Consumer Warranty:3 Years
 Commercial Warranty:Not Available

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Cummins Onan RV QG 4000 Reviews & Ratings
Overall Rating
3.3 out of 53.3 out of 53.3 out of 53.3 out of 53.3 out of 5
Easy To Use (2)
Low Quality (3)
Expensive (3)
Durability (1)
Unreliable (1)
43% of respondents would recommend this product to a friend
9 Reviews  Sort by 
Mike, the Generator Expert
Electric Generator Expert

Product Expert
Total Reviews
103 Reviews
Total Helpful Votes
7934 Helpful Votes
Electric Generators Direct Recommended

The Cummins Onan QG4000 is a great entry level product for RV generators. This model features Cummins Onan 4-Cycle OHV engine for the most electrical output for your dollar.

If you are looking for a no-frills design or watching your expenses this will definitely get the job done, but might not give you the peaceful experience you were looking for.

This unit is ideal for light and medium use applications and will handle all of your basic power needs.
This unit is a reliable value... more
Mike Recommends This Model
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manufacturers review image

Territory Manager
From The Manufacturer
Review On Rv Qg4000 & Rvqg4000 Evap
This is our most common generator sold along with the RVQG4000 EVAP model as mentioned in the video by Jeff Michaels, Cummins Business Development Manager.

It very Quiet, reliable, and includes many features.
Sound: 68 dB(A) readings at 10 ft (3 m) half load
• Meets National Park Service sound level requirements
(60 dB(A) @ 50 ft) for use in national parks

• Microprocessor control with diagnostics.
• Exceptionally smooth, quiet operation.
• Sealed connectors.
• Full housing with... more
Was this review helpful?
Total Helpful Votes
14 Helpful Votes
Most Helpful Critical Review
1 out of 51 out of 51 out of 51 out of 51 out of 5
Never Again
The motor home that we purchased came with an Onan generator. It was faulty and was replaced (under warranty) within the first 6 months. The replacement generator was rarely used and we just paid over $1,000 to find out that the motor is no good and would cost $4,000 to replace (motor only). As far as I am concerned, Onan generators are junk.
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Jeff White
Riverton, UT
Total Helpful Votes
12 Helpful Votes
1 out of 51 out of 51 out of 51 out of 51 out of 5
Onan 4000 Pos Generator
After cleaning the carburetor and now replacement of a carburetor. Then a high frequency fault on a $3,000 generator that has less then 40 hrs on it. At the most it sat for 2 months, yes the manuals say to run every month, but I also have a $400 generator that can sit for more then months at a time and I have never had a issue with it. Thought it would be nice not to have to carry the portable generator when we go camping. So when I bought a new RV I wanted a generator with the vehicle, when... more
Pros: Easy To Use
Cons: Low Quality, Expensive, Unreliable
Was this review helpful?
Total Helpful Votes
61 Helpful Votes
4 out of 54 out of 54 out of 54 out of 54 out of 5
Short Life Span Considering It's $1000 More Than Generac
Have had several generators over the years but none as disappointing as this one and I'm not the only one. The engine parts of the generator has been great but unfortunately the electrical end has not. The plastic part of the rotor came apart inside the generator and took out the electrical end of the generator. A closer look at the design and its hard to believe this is a Cummins product.
Cons: Low Quality, Expensive
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Dale W.
Ft. Lauderdale, FL
Total Helpful Votes
14 Helpful Votes
3 out of 53 out of 53 out of 53 out of 53 out of 5
Can Be A Problem
Bought a used MoHome w/ unknown hours on Generator. Worked fine for 12 months, then $1400 in the next 6 mo. Bought a new one, worked fine for 15 mo., then the manufacturer had it torn down and reassembled under warranty. Worked fine for 12 mo. until hour limit exceeded. then $1100.

Worked 30 hrs. and $1300 ($400 me /$900 dealer write off). Constant warning by shop guys- too much usage!!! Good when NEW, but just not made for extended purposes. When warantee runs out, so does your financial... more
Pros: Easy To Use
Cons: Low Quality, Durability, Expensive
Dale Recommends This Cummins Onan Product
Manufacturer Response
Brand Rep
Sorry you've had a negative experience thus far. We are happy to help get this resolved and get you in contact with your local distributor (Cummins Power South). We suggest you bring in your motor home along with any service records/ maintenance logs, inform them of the loads you are running and conditions you run the motor home/generator in. This will help assist with a better diagnosis.

Here is the link for Cummins Power South-
Cummins Power South Service Center Contact Info

Please contact PED if you need further assistance from me.
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Highland, IN
Total Reviews
2 Reviews
Total Helpful Votes
14 Helpful Votes
5 out of 55 out of 55 out of 55 out of 55 out of 5
Running Again
Follow up to my first review.

Got it back in. Took 2 hours to get it out. Service was great. It was the brushes. Got it back (closest service place was 35 miles away). 45 minutes to re-install and running fantastic now.

There is always a chance of problems, it is how a company reacts when it does happen which is important. Cummins took care of it well. Thanks
Joe Recommends This Cummins Onan Product
Manufacturer Response
Brand Rep
We are happy to hear about your great experience and strive to keep our customers happy.

Thank You for choosing Cummins and leaving your feedback.
Was this review helpful?
Highland, IN
Total Reviews
2 Reviews
Total Helpful Votes
14 Helpful Votes
1 out of 51 out of 51 out of 51 out of 51 out of 5
Ran For Two Hours
Took me awhile to get it installed. The installation of it is straight forward as long as you have basic skills.

Went out for the first time WA and was really enjoying it. Then lights started flickering and the generator died. 2 hours. Sure warranty but now I had to take it back out and then the closest service center is 33 miles away.

It is on the way to get serviced now so we will see. I will post updates.
Mike, the Generator Expert
Product Expert
We're sorry to hear you had a bad experience. Of the units purchased from Electric Generators Direct, we've had no complaints, but even the greatest brands can have problems at times.

Best of luck, and we hope you're able to make good use of it again soon.
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Thackerville, OK
5 out of 55 out of 55 out of 55 out of 55 out of 5
I like the generator I have recently purchased for my horse trailer with living quarters. It is very quiet and we had a good time this weekend when we took it out.
Was this review helpful?
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