Zoom on the Cummins Onan P9500df
In summary, the Cummins Onan P9500df is a portable generator especially useful for:
- Food truck owners who do not wish to see their business interrupted under any circumstances
- Homeowners in need of an emergency backup power for their essentials
- Professionals who want to be able to deliver results, even during a power failure
The following sections will present you in detail its power characteristics, the different outlets it offers, its overall portability, the extra features it benefits from, and any relevant emission compliance details.
Power & Run Time
The dual-fuel technology of the Cummins Onan P9500df allows for an output of 120/240V and provides superb power and versatility. If gasoline-powered, the device provides a running wattage of 7,500W and a starting wattage of 9,500W. If propane-powered, it gives 6,750 rated watts and 8,550 starting watts.
The generator features a simple traditional pull-start mechanism and also a convenient and easy-to-use electric starter (battery included). It is rated for a noise of 74 dBA (just slightly more noisy than a dishwasher). The Onan P9500df can also be remotely started, offering further convenience (key fob included).
The Onan P9500df, with a fuel capacity of 6.6 gallons, reaches a run time of up to 16 hours utilizing gasoline (fuel consumption around 0.41 GPH). Alternatively, it can reach a run time of up to 8 hours (on a 20 lbs tank - propane consumption around 0.59 GPH) with propane.
The quite high THD (<23%) of the Onan P9500df makes it unsuitable for powering sensitive electronic devices.
The control panel features the upcoming 5 AC outlets:
As the Onan P9500df holds a twist-lock L14-30R receptacle, it is transfer switch ready: you'll easily be able to connect it to your breaker box to power your home during a power outage.
Cummins' Smart Switch Outlet
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.
The Cummins Onan P9500df has the following dimensions: L27.3 x W26.3 x H26.3 in. In combination with its conventional, open frame design, they provide support and allow the generator to be raised above ground level. The device has been designed for tough environments and demanding outdoor use.
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. However, this lack of maneuverability is compensated by its wheel kit (⌀10") and its folding handle, with which you can conveniently shift it, once it's on the ground.
The Onan P9500df's control center features a convenient meter, which displays voltage, frequency and lifetime hours to aid you with the monitoring of its status and activity.
The generator includes a built-in fuel gauge, a quick, easy and convenient method of checking the device’s gas level.
Security-wise, this product benefits from an overload protection (circuit breaker) and an automatic low oil shut-off, which gives you a complete peace of mind when using it.
Apart from the typical documentation and an owner's manual (opens in a new tab), which lets you start it right away, the Cummins Onan P9500df also is packed along with the following accessories: oil, propane hose, key fob, funnel, battery charger and tool kit.
The Cummins Onan P9500df is EPA-approved and CARB-compliant. It can therefore be sold and purchased in all 50 states, including California.
Moreover, it features a spark arrestor, which makes it suitable for use in forested areas.
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).
- Since the generator weighs in at a dry weight of 194 lbs, the Cummins Onan P9500df belongs in the expected weight range for dual fuel devices which can produce between 7000 and 8000 rated watts. Regarding dry weight, one of the champions in the same power range is the Sportsman GEN85KIDF, with a dry weight of only 133 lbs.
- As this generator has its lowest possible noise of 74 dBA, it should be considered noisier compared to its peers of a comparable running wattage. If you are concerned with noise, check out the Champion 201175, which is one of the least noisy generators in its power range, with a noise rating of just 61 dBA.
- As for its autonomy, the Onan P9500df, with an autonomy of up to 16 hours at a 25% load, is placed on the low end among the generators of its kind. If concerned with autonomy, one of the products of a comparable power output, which offers the highest run time, is the DuroMax XP8500EH, boasting with up to 25 hours.
- Autonomy holds its importance, however, it is largely dependent on the generator’s fuel capacity and so, it is nonsensible to discuss it without mentioning fuel efficiency as well. This generator is somewhat less fuel efficient than devices of comparable output: its estimated fuel consumption reaches 0.41 GPH at a 25% load. If you wish to further improve in the area of fuel efficiency, the DuroMax XP8500EH, which boasts with a gas consumption of only 0.32 GPH, may be the right generator for you.
As you can see from this interactive chart, 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
|Fuel||Dual Fuel (gasoline/propane)|
|Engine||420 cc Ducar OHV 4-stroke|
|Starting system||Recoil, Electric, Remote|
|Voltage||AC: 120/240V 60 Hz|
|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|
|Automatic Voltage Regulation||Yes|
|AC outlets|| |
|Fuel tank||Steel, 6.6 gal|
|Approx. dimensions (L x W x H)||27.3 x 26.3 x 26.3 in|
|Noise (lower limit)||74 dBA|
|Security||Low oil and overload protection|
|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.
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.
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|
|Total||5967 W||7442 W|
|For camping||Radiant heater||1300||1300|
|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|
|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.
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