The Cummins Onan P9500df is a portable open frame dual fuel generator with a rated wattage of 7,500 W and a starting wattage of 9,500 W. (Read full specs)
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Amazon | Price history for the Cummins Onan P9500df |
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| Highest Price $1,131.00 Lowest Price $1,131.00 Current Price $1,131.00 |
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Description
Zoom on the Cummins Onan P9500df
In short, the Cummins Onan P9500df is a portable generator adequately designed for:
- Food van owners who know that just a short power outage could lose them hundreds of dollars
- Homeowners who want to be sure of their ability to power their fridges, cooking tools, heating and lighting equipment during power failures
- Professionals who want to be able to deliver results, even during a power failure
In the sections ahead, the power characteristics, availability of various outlets, the portability, and any additional features of the device shall be discussed.
Power & Run Time
The Cummins Onan P9500df
Delivering 120/240V, the Cummins Onan P9500df is enhanced by dual-fuel technology, providing power and versatility. Running on gasoline, it boasts a running wattage of 7,500W and a starting wattage of 9,500W. Alternatively, when propane-powered, it delivers 6,750 running watts and 8,550 starting watts.
With a noise rating of 74 dBA (just slightly more noisy than a shower), the generator features a standard recoil pull-rope starting mechanism, but also a straightforward and intuitive electric starter (battery included). Furthermore, the Onan P9500df can be remotely started, providing users with added ease of use (key fob included).
In terms of its run time capability, the Onan P9500df, furnished with a 6.6 gallons fuel tank, can maintain operations for up to 16 hours on a full tank of gasoline (with fuel consumption averaging 0.41 gallons per hour). It also provides up to 8 hours (on a 20 lbs tank - propane consumption around 0.59 GPH) of operation with propane.
Since the Onan P9500df has a high THD (<23%), it is advisable to not use it for the powering of sensitive electronic devices.
Outlets
The control panel features the upcoming 5 AC outlets:
Thanks to its twist-lock L14-30R receptacle, the Onan P9500df is transfer switch ready, facilitating easy hookup to your breaker box to provide backup power for your home during blackouts.
Cummins' Smart Switch Outlet
The Onan P9500df has an identical outlet, but with a different name
The Onan P9500df features a special outlet that allows an automatic power transfer in case of a power outage.
To benefit from this feature, you'll need Cummins' Automatic Transfer Switch, which is not included with the generator.
As mentioned further up, since this unit is simply a Westinghouse generator in disguise, you can absolutely use the Westinghouse ST Switch (opens in a new tab) instead. It serves the exact same purpose.
Simply put, the ST Switch is a cost-effective and versatile portable automatic transfer switch, which can be installed quickly and easily, without the assistance of an electrician.
Plug the ST Switch into one of your household 120V outlets, plug your appliances to the ST Switch, and connect the Onan P9500df to the ST Switch via the special outlet and a 120V cord. The generator will automatically turn on when the power goes out, and automatically turn off when the power returns.
Portability
Measuring L27.3 x W26.3 x H26.3 in, the classic open frame build of the Cummins Onan P9500df delivers stability and easy maintenance access to components, facilitating air circulation. The generator is designed for ideal use outdoors and in rough environments.
Although this generator is technically considered 'portable' (in the sense that it can be moved), its 194 lbs make it incredibly difficult to manually lift and transport. Nevertheless, it can still be moved quite conveniently with the help of its wheel kit (⌀10") and its folding handle, once it is placed on the ground.
Features
The Onan P9500df's control panel
The Onan P9500df's status and activity may be monitored conveniently via the control panel, as it features a convenient meter showing you voltage, frequency and lifetime hours.
Thanks to its built-in fuel gauge, the generator allows you to quickly, conveniently, and easily check the gas level at a glance.
In terms of security, the generator features an automatic low oil shut-off and an overload protection (circuit breaker), ensuring peace of mind during its use.
Apart from the standard documentation and an owner's manual (opens in a new tab) to facilitate setup, the Cummins Onan P9500df features extra accessories: battery charger, oil, propane hose, tool kit, key fob and funnel.
Product Video
The Cummins Onan P9500df versus other generators
The following charts are provided to give you an idea of how some of the key specs of the Cummins Onan P9500df compare to dual fuel generators of similar power (between 7000 and 8000 W).
- Weighing in at 194 lbs, the Cummins Onan P9500df fits within the expected weight range for dual fuel devices producing 7000 to 8000 rated watts. If weight matters to you, one of the champions in this power range is the Sportsman GEN85KIDF with only 133 pounds.
- When comparing it to devices with a similar running wattage, this generator's lowest noise level of 74 dBA puts it alongside the noisier units. If you value reduced noise levels, the Champion 201175 could be worth considering. It's one of the quietest generators in its power range, rated at 61 dBA.
- Regarding its autonomy, the autonomy of the Onan P9500df, reaching up to 16 hours at a 25% load, can be considered as low end, compared to other dual fuel products of a roughly equal output. If you wish to prioritize autonomy, the DuroMax XP8500EH shines as one of the top contenders, offering one of the highest run times among generators with similar power output, totaling up to 25 hours.
- While the run time is an important parameter, it is dependent on the fuel tank's capacity and thus, doesn't say much on its own unless we consider fuel consumption as well. This generator doesn't excel in fuel efficiency when compared to others of its kind: it consumes approximately 0.41 GPH at a 25% load. If minimizing fuel usage is one of your key priorities, the DuroMax XP8500EH is one of the most efficient devices with similar power output, with a gasoline consumption of only 0.32 gallons per hour.
Price comparison
As you can see from these interactive charts, when compared to other 7000-8000W dual fuel generators, the Cummins Onan P9500df is on the average side of the price range.
Therefore, this generator nicely fits in the expected budget for this kind of product.
The bottom line
- In the expected price range
- Dual Fuel
- Several accessories included
- GFCI Outlets
- Remote start
- Compatible with Westinghouse ST Switch
- Decent weight (194 lbs)
- No 50-amp output
- On the noisy side (74 dBA)
- Relatively low run time
- Low fuel efficiency
Features and Specifications
| Inverter | No |
|---|---|
| Parallel capable | No |
| RV ready | No |
| Fuel | Dual Fuel (gasoline/propane) |
| Engine | 420 cc Ducar OHV 4-stroke |
| Starting system | Recoil, Electric, Remote |
| Warranty | 3 years |
| Voltage | AC: 120/240V 60 Hz |
| Gasoline | Propane | |
|---|---|---|
| Running watts | 7,500 W | 6,750 W |
| Starting watts | 9,500 W | 8,550 W |
| Running amps (@120/240V) | 62.5/31.3 amps | 56.3/28.1 amps |
| Peak amps (@120/240V) | 79.2/39.6 amps | 71.3/35.6 amps |
| Run time @50% load | 11 h | Unknown |
| Run time @25% load | 16 h | 8 h |
| GFCI outlets | Yes |
|---|---|
| Covered outlets | Yes |
| Automatic Voltage Regulation | Yes |
| AC outlets |
|
| DC outlets | No |
| Data center | VFT |
| Indicators | No |
| Fuel tank | Steel, 6.6 gal |
| Fuel gauge | Yes |
| Weight | 194 lbs |
|---|---|
| Approx. dimensions (L x W x H) | 27.3 x 26.3 x 26.3 in |
| Noise (lower limit) | 74 dBA |
| THD | < 23% |
| Compliance | CARB, EPA |
| Security | Low oil and overload protection |
| Spark arrestor | Yes |
| Neutral | Bonded to frame |
| Accessories included | Oil, funnel, tool kit, key fob, battery charger, propane hose, battery, and wheel kit |
| Other model numbers | A058U967 |
Unlike many websites, we did our best to research each of the specs above. That being said, we are not immune to making the occasional mistake or omission. Should you notice any missing or incorrect values, don't hesitate to suggest improvements so we can address the issue.
About Cummins
Cummins is a NYSE publicly traded, Fortune 500 corporation dealing in the power sector and heavy industry. Founded in 1919 in Columbus, IN, by William Glanton Irwin and Clessie Cummings, Cummins focused on the development of diesel engines. However, the company truly came to bloom only after the WWII, with the nationwide road expansion and went finally global in the 1960s, with its heavy-duty trucks. Cummins has, over the years, offered a wide variety of power solutions, from actual power plants to RV generators. Yet, the company has only recently dipped its foot into the portable generator market. The company currently offers a small selection of both conventional and inverter generators under the Onan product line, formerly the Cummins Onan brand.
Warranty Information
The Cummins Onan P9500df is covered under a warranty for up to 3 years. This warranty may be limited and may not cover all parts of the generator.
For more information about the warranty of Cummins generators, please contact the Cummins Customer Support: 1-800-CUMMINS (800-286-6467).
Questions & Answers
What can it power?
| Item | Running Watts | Starting Watts | |
|---|---|---|---|
| At home | Sump pump (1/2 hp) | 1050 | 2150 |
| Furnace fan (1/2 hp) | 875 | 2350 | |
| Refrigerator (energy star) | 192 | 1192 | |
| Electric range | 2100 | 2100 | |
| Electric grill | 1650 | 1650 | |
| Radio | 100 | 100 | |
| Total | 5967 W | 7442 W | |
| For camping | Radiant heater | 1300 | 1300 |
| RV refrigerator | 180 | 600 | |
| Hair dryer | 1800 | 1900 | |
| Electric grill | 1650 | 1650 | |
| RV AC (11,000 BTU) | 1010 | 1600 | |
| Set of 5 LED light bulbs | 55 | 55 | |
| Total | 5995 W | 6585 W | |
| For work | Table saw | 1800 | 4500 |
| Air compressor (1 hp) | 1600 | 6100 | |
| Grinder | 1400 | 2500 | |
| Bug zapper | 80 | 80 | |
| Total | 4880 W | 9380 W |
What oil do I use in my 9500 Gas/propane generator? (Asked February 27, 2023)
For general, all-temperature use, you can use SAE 10W-30.
Couldn't find the right answer for you? Ask your own question.
User Reviews
I bought my P9500 DF in 2019. I ran this generator for 2 years basicly nonstop while I was building a home. I was using it to power the Rv we were living in. The only time I shut it off was for refueling or reg maintance. After my home was complete I put it in my well house and used it as a back up for power outages during fire season. Worked great till 2022 it was tired. Maybe I am lucky maybe its well built!!
I’m surprised with all the low reviews I’ve had my 9500 for a little over a year and love it! I just ran it for 24 hours straight during the Hurricane that just hit Florida. I have mine hooked to my houses’s breaker panel and powers everything, 3.5t A/C with soft start. Runs perfect on propane and gas( non ethanol) and has zero leaks. It’s a little loud, but that’s not a factor for me. I keep the battery charged and start it every couple weeks.
It was great and easy out of the box but wouldn’t start on gasoline. I inject fuel into the air cleaner it pops but won’t run. Hooked up to propane and it runs! any others have this problem ?
There is a break in period for sure. Also you must be sure to charge the battery for the starter and to not let fuel foul the system. Its strong but it takes maintenance.
It ran my AC just fine and a person I know with the same model runs half of his house with it hooked to his panel box..
I do not understand any of these negative reviews. I have started mine manually, remotely and with the FOB. All good. Ran it for the 5 hr break in and changed the oil. Ran it again twice for 30 minutes. No problems.
If this changes to my disappointment I will post it but so far so good.
The noise is the 85 dB as listed when I measured it at 3′. I built an extended exhaust system for it the works really well.
I say don’t hesitate to consider this generator.
All the best.
Bought this Generator, did all the per checks, filled with oil, gas, the unit will not start up, I have drained the battery 3 times and still nothing ! I have called and sent emails out…. All they say is you need to take it to an authorized dealer for repairs ??? I don’t have time to run it all over for repairs, would like to return it with a full refund.
Piece of crap. Trying to use during hurricane Iannjust now. Will only power up a single refrigerator – nothing else. If anything else plugged in will blow circuit both breakers and then you have nothing which is what this thing is. It’s a new unit. My old regular Honda worked great – put in shop for service whe hurricane Ian came up. Thought we had everything covered with this new on an/ Cummins unit. Boy was I wrong. Run, don’t just walk away from these. Even the cheap Harbor Freight units are better than these.
Very bad product
At 25 hours Stepper motor failed. Unit wouldn’t start! At 381 hours took unit to Cummins in Green Bay, Wisconsin. Tech found a valve spring was broken and keeper nuts had severed and scarred piston and cylinder walls! Took Cummins a day and a half to get approval to replace this generator! I had to wait 2.5 more weeks for my replacement to arrive at Cummins in Green Bay! I made two round trips to Green Bay Cummins and then had to drive to Saukville, Wisconsin to deliver this generator back to Camping World for my refund. Neither company [Cummins or Camping World] even remotely offered to reimburse me for my diesel fuel ⛽️!! Heartless companies selling absolute junk generators!!!
I got one brand new and after26 hrs run time the engine lost compression I’m out 1100.bucks and I’m pissed off the place I bought it won’t refund the money and I’m powerless in se alaska in my mortorhome
I bought a Onan 9500 from a solar supply guy and it has leaked propane from Day ONE. I have called Cummins and they said they would have a tech contact me and it never happened. never ever heard back. This winter it was leaking liquid propane onto the floor of my gen Shed and it caught on fire. Luckily i was in the shed when it happened and put it out immediately before any real damage.
The Solar dealer has been trying to get warranty sorted out since early February with no luck.
He had sold several of these to customers and all with the same issue. He has a garage full of Onan 9500 that all leak propane thru the carb and customers are fed up. Save your money. I thought I was getting a quality unit when I bought a Cummins product but did I ever get fooled.
This generator is the biggest pile of crap. Has only started maybe 3 times with the push start. It wont start with the pull. When it tries to start with the push start, the battery dies and probably because it tries to start 4 times and fails. When it does start, we were able to power 2 rv AC units. it’s REALLY REALLY LOUD. Do not buy. Unreliable generator.
Seemed to work great and powered a 30 gallon 2 stage air compressor well. Next test will be running a Miller 130 wire feed welder.
I’m working with a customer who bought 2 of the generator from an rv co. Online. Neither one runs. On either fuel. He had trouble getting service from the place he bought them from. I’m an independent repair shop and The parts availability and service very poor. I’m dealing with some kind of factory defect in the timing of the ignition.