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- Cummins Onan P9500DF EFI
- Ford FG28KVTWTCO
Quick charts
Each chart uses its own Y-axis scale (so numbers are comparable within a chart).
Running watts
W
Starting watts
W
Noise
dB
Runtime @50%
h
Running watts by fuel
Shows how output changes across gasoline/propane/natural gas (when available).
| Specification | Cummins Onan P9500DF EFI | Ford FG28KVTWTCO |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Dual-Fuel | Tri-Fuel |
| Inverter | No | No |
| Parallel capable | No | No |
| RV ready | No | Yes |
| Running watts | 7500 W | Winner: Winner: 20000 W |
| Starting watts | 9500 W | Winner: Winner: 28000 W |
| Noise (lower limit) | Winner: Winner: 74 dB | 99.7 dB |
| Weight | Winner: Winner: 211.6 lbs | 557 lbs |
| Run time @50% load | 9.6 h | Winner: Winner: 10.8 h |
| Run time @25% load | 14.4 h | Not available |
| Fuel tank | 6.6 gal | 17.17 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 27.3 x 20.6 x 22.6 | 39.7 x 27.5 x 45.2 |
| Electrical | ||
| Voltage (AC) | 120/240 | 120/240V 60 Hz |
| Voltage (DC) | 5 | Not available |
| GFCI outlets | Yes | Yes |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | Yes |
| THD | 23 % | Not available |
| Engine | ||
| Engine | 420 cc OHV 4-stroke | 999 cc OHV V-Twin |
| Alternator | Not available | Not available |
| Starting system | Recoil, Electric, Remote | Electric, Remote |
| Warranty | ||
| Warranty | 3 years | 3 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 7500 W | 20000 W |
| Starting watts | 9500 W | 28000 W |
| Running amps (120V) | Not available | Not available |
| Running amps (240V) | Not available | Not available |
| Peak amps (120V) | Not available | Not available |
| Peak amps (240V) | Not available | Not available |
| Run time @50% load | 9.6 h | 10.8 h |
| Run time @25% load | 14.4 h | Not available |
| Propane | Not available | Not available |
| Running watts | 6750 W | Not available |
| Starting watts | 8550 W | Not available |
| Running amps (120V) | Not available | Not available |
| Running amps (240V) | Not available | Not available |
| Peak amps (120V) | Not available | Not available |
| Peak amps (240V) | Not available | Not available |
| Run time @50% load | Not available | Not available |
| Run time @25% load | 10.8 h | Not available |
| Other | ||
| Data center | Not available | Not available |
| Indicators | false | false |
| Compliance | CARB, EPA, ANSI/PGMA G300-2023 | EPA, ANSI/PGMA G300-2023 |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | true | true |
| UPC | Not available | 814726029418 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 7500 | 20000 |
| Running Watts (Propane) | 6750 | Not available |
| Starting Watts (Gasoline) | 9500 | 28000 |
| Starting Watts (Propane) | 8550 | Not available |
| Runtime @ 50% Load (Gasoline) | 9.6 | 10.8 |
| Runtime @ 25% Load (Gasoline) | 14.4 | Not available |
| Runtime @ 25% Load (Propane) | 10.8 | Not available |
| AC Outlet Types | 2x Duplex 120V 20A (5-20R) GFCI; 1x 120/240V 30A (L14-30R) | 2x Duplex 120V 20A GFCI; 1x 120V 30A (L5-30R); 2x 120/240V 30A (L14-30R); 2x 120/240V 50A (14-50R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | OHV 4-stroke | OHV V-Twin |
| Engine Displacement | 420 | 999 |
| Engine Oil Type | SAE10W30 | SAE 10W-30 |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | 14.4 | Not available |
| Runtime @ 50% Load (Gasoline) | 9.6 | 10.8 |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection | Low oil and overload protection |
| Low Oil Protection | Yes | No |
| Carbon Monoxide Monitoring | Yes | Yes |
| Included equipment | ||
| Mobility Components | Yes | Not available |
| Included Accessories | Oil, funnel, tool kit, key fob, propane hose, battery, and wheel kit | Oil, funnel, tool kit, key fob, natural gas hose with NPT adapter, propane hose, battery, and wheel kit |
| Warranty & identification | ||
| Commercial Warranty | 3 | 3 |
| Part Number | A075C509 | Not available |
| Additional specs | ||
| Summary | The Cummins Onan P9500DF EFI is a 7,500-watt dual-fuel generator built for users who need sustained power across multiple load types. On gasoline, it delivers 7,500 running watts and 9,500 peak watts. On propane, it drops to 6,750 running watts and 8,550 peak watts, which means propane users sacrifice roughly 10 percent of output but gain extended storage life and cleaner emissions. The electronic fuel injection engine handles high-altitude operation up to 13,123 feet without modification, making it viable for mountain jobsites, remote cabins, and RV camps where carbureted engines would struggle. At 211.6 pounds with an included wheel kit, this generator demands stationary placement or two-person handling, but the 6.6-gallon fuel tank stretches runtime to 14.4 hours at 25 percent load on gasoline. This is a workhorse for contractors, emergency backup, and off-grid scenarios where fuel flexibility and durability matter more than portability. | The Ford FG28KVTWTCO is a 20,000-watt tri-fuel generator built for whole-home backup, commercial job sites, and stationary power delivery. It runs on gasoline, propane, or natural gas, eliminating single-source fuel dependency. At 557 pounds with a 39.7 x 27.5 x 45.2 inch footprint, this is a semi-permanent installation that demands dedicated storage and logistical planning. |
- Most PowerfulFord FG28KVTWTCO20000W running
- QuietestCummins Onan P9500DF EFI74 dB
- Longest RuntimeFord FG28KVTWTCO10.8h at 50% load
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Cummins Onan P9500DF EFI
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