Ships freight on a pallet (shipping weight about 225 lb). Freight delivery is $159 and includes residential liftgate service. The truck lowers the pallet to the ground for you, so no loading dock or forklift is needed. The delivery charge is shown at checkout before you pay.
The Cummins Onan P11000iTF is an 11,000-watt tri-fuel portable inverter generator that runs on gasoline, propane or natural gas. It delivers 9,000 running watts on gasoline at 120/240V with less than 3 percent total harmonic distortion, and it has a 50A RV outlet, push button and remote start, and a carbon monoxide detector with automatic shutoff.
Home Backup Power on Gasoline, Propane or Natural Gas
The Cummins Onan P11000iTF (part number A078C500) is a tri-fuel portable inverter generator for home backup, RV and jobsite use. It produces 9,000 running and 11,000 peak watts on gasoline, 8,100 running and 10,000 peak watts on propane, and 7,200 running and 8,800 peak watts on natural gas, at 120/240V and 60 Hz. A 457cc Cummins Onan engine drives a built-in inverter with total harmonic distortion of 3 percent or less, so it is suited to sensitive electronics. It runs about 16.5 hours on its 7.4-gallon gasoline tank at 25 percent load, starts by push button, remote fob or pull cord, and shuts itself off if its carbon monoxide detector senses a dangerous level. It is a US model and is not for sale in California.
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9,000W running on gasoline (11,000W peak)
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3 fuels gasoline, propane or natural gas, switched with one dial
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120/240V with a 50A (14-50R) and a 30A (L14-30R) outlet
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16.5 hrs on gasoline at 25% load
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64 dBA operational volume
Why three fuels matter in a long outage
The first day of an outage is rarely the hard part. The hard part is day three, when the gas cans are empty and the stations near you are closed or out. The P11000iTF lets you change fuels with the turn of a dial, so you can run on gasoline, switch to a propane tank, or connect to a natural gas supply.
On gasoline it delivers 9,000 running watts, enough capacity to run several household circuits at once through a transfer switch. On propane it delivers 8,100 running watts and on natural gas 7,200, so plan your loads around the fuel you expect to use most.
It is an inverter generator, so its output has total harmonic distortion of 3 percent or less. That is the kind of clean power computers, modems, TVs and appliance control boards need. The Digital Data Center shows remaining runtime, power, voltage, frequency, fuel level and lifetime run hours, so you always know where you stand.
Key features
Tri fuel with the turn of a dial
Switch between gasoline, propane and natural gas from one control. Gasoline runs from the on-board 7.4-gallon tank with a digital fuel gauge.
Clean inverter power
Total harmonic distortion is 3 percent or less, with variable engine speed and auto idle control that slows the engine when demand drops.
Push button and remote start
Start it with the push button or a remote fob from up to 98 feet away, with a pull cord as a backup.
Carbon monoxide detector with automatic shutoff
The generator monitors carbon monoxide and shuts itself off for safer operation. It is not a substitute for running it outdoors and for CO alarms in your home.
120/240V outlets for home and RV
One duplex GFCI 120V 20A (5-20R), one 120/240V 30A twist-lock (L14-30R), one 120/240V 50A (14-50R) and two USB-A 5V 2.1A ports, all covered. It is manual transfer switch ready.
Ready to parallel
Ports for parallel operation let you link two units with the Cummins parallel kit (A069E133) when you need more power.
How long will it run?
| Load |
Estimate |
Assumption |
| Gasoline, 25% load |
16.5 hours |
Full 7.4-gallon tank |
| Propane, 25% load |
6.7 hours |
Standard 20-lb propane tank |
| Natural gas, 25% load |
50 hours |
Cummins figure, based on maintenance intervals |
Run times are Cummins' published figures at 25 percent load. Higher loads shorten them. Natural gas has no tank to run dry, so Cummins bases that figure on the maintenance schedule.
Is it right for you?
Best for
- Homes with a natural gas or propane supply that want a fuel source that outlasts the gas cans
- Home backup through a transfer switch, using the 120/240V 30A or 50A outlet
- RVs and fifth wheels with a 50A shore power connection
- Households running computers, networking gear and other sensitive electronics
- Job sites that need 240V power and clean output from one machine
Not the right fit for
- Buyers in California: Cummins lists this US model as not for sale in California
- Anyone who needs to lift it by hand: the dry weight is 219 lb, so it rolls on its wheel kit
- Hands-free automatic backup: it is a portable generator you start and connect yourself, not a standby unit
- Running indoors, in a garage or under a carport, even with the door open
Cummins Onan P11000iTF vs. conventional open-frame gas generator
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Cummins Onan P11000iTF |
Conventional open-frame gas generator |
| Fuels |
Gasoline, propane or natural gas |
Usually gasoline only, sometimes dual fuel |
| Power quality |
Inverter output, THD 3% or less |
Raw alternator output, often higher distortion |
| Engine speed |
Variable, with auto idle |
Typically fixed speed regardless of load |
| Fuel that does not run out |
Natural gas connection |
Limited to what is in the tank and cans |
| Starting |
Push button, remote fob or pull cord |
Often pull cord, sometimes electric |
Safety and setup
Outdoors only, away from the house
Generator exhaust contains carbon monoxide, which can kill in minutes. Run it outdoors only, far from doors, windows and vents, never in a garage, basement, shed or under a carport, even with the door open. Keep battery-powered CO alarms working inside your home.
Connecting to your home
Never plug the generator into a wall outlet. To power household circuits, have a licensed electrician install a transfer switch or interlock. The P11000iTF is manual transfer switch ready.
Natural gas and propane connections
Have a licensed gas professional make any natural gas connection and confirm your supply can meet the generator's demand. Use the Cummins natural gas hose kit (A069G128).
Above 2,000 feet
Operation above 2,000 ft requires the Cummins high altitude carburetor kit (A069E131), and propane or natural gas operation above 2,000 ft also requires the high altitude fuel switch kit (A069E132).
Specifications
| Spec |
Value |
| Model / part number |
Onan P11000iTF / A078C500 |
| Gasoline |
9,000 running W / 11,000 peak W (75 A at 120 V, 37.5 A at 240 V running) |
| Propane |
8,100 running W / 10,000 peak W |
| Natural gas |
7,200 running W / 8,800 peak W |
| AC voltage / frequency |
120/240 V, 60 Hz |
| Total harmonic distortion |
3% or less |
| Engine |
Cummins Onan 457 cc OHV 4-stroke, variable speed, auto idle |
| Starting system |
Electric push button, remote (up to 98 ft / 30 m), recoil |
| Gasoline tank |
7.4 gal (28 L), digital fuel gauge, 10% ethanol or less |
| Run time at 25% load |
16.5 hrs gasoline; 6.7 hrs propane (20-lb tank); 50 hrs natural gas (maintenance based) |
| AC outlets |
(1) duplex GFCI 120V 20A (5-20R); (1) 120/240V 30A (L14-30R); (1) 120/240V 50A (14-50R) |
| DC outlets |
(2) USB-A 5V 2.1A |
| Operational volume |
64 dBA |
| Oil |
SAE 10W30, 1.16 qt (1.1 L) capacity, low oil shutdown |
| Safety |
CO detector with automatic shutoff, overload circuit breaker, spark arrestor |
| Ground |
Neutral bonded |
| Parallel capable |
Yes, with parallel kit A069E133 |
| Above 2,000 ft |
Carburetor kit A069E131; fuel switch kit A069E132 for propane or natural gas |
| Emissions |
EPA. US model, not for sale in California |
| Assembled size (L x W x H) |
30.3 x 25.0 x 27.0 in (45.7 in long with handle extended) |
| Wheels |
8 in diameter, 2 in wide |
| Dry weight / shipping weight |
219 lb / 225 lb |
Frequently asked questions
How many watts does the Cummins Onan P11000iTF produce?
On gasoline it produces 9,000 running watts and 11,000 peak watts. On propane it is 8,100 running and 10,000 peak, and on natural gas 7,200 running and 8,800 peak. Size your loads to the running figure for the fuel you plan to use.
Can the P11000iTF run on my home's natural gas?
Yes. It runs on natural gas as well as gasoline and propane. Cummins sells a 25 ft natural gas hose kit (A069G128) for it. Have a licensed gas professional make the connection and confirm your gas supply can meet the generator's demand.
How long will the P11000iTF run on a tank of gas?
Cummins rates it at 16.5 hours on its 7.4-gallon tank at 25 percent load. On a standard 20-lb propane tank it runs 6.7 hours at 25 percent load. Heavier loads shorten both.
Can I power my house with the P11000iTF?
Yes, through a transfer switch or interlock installed by a licensed electrician, using the 120/240V 30A (L14-30R) or 50A (14-50R) outlet. The unit is manual transfer switch ready. Never backfeed a house through a wall outlet.
Will it run a 50 amp RV?
It has a 120/240V 50A (14-50R) outlet, so a 50A RV cord plugs straight in. It supplies up to 9,000 running watts on gasoline, which is less than a full 50A service can draw, so stagger large loads such as two air conditioners and a water heater.
Is the P11000iTF safe for computers and electronics?
Its built-in inverter keeps total harmonic distortion at 3 percent or less, which Cummins describes as suitable for sensitive electronics.
How loud is the Cummins Onan P11000iTF?
Cummins lists its operational volume at 64 dBA.
Can I buy the P11000iTF in California?
No. Cummins lists it as a US model that is not for sale in California.
