Compare Generators Side-by-Side
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- Cummins Onan P9500df
- DuroMax XP9500iH
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 | DuroMax XP9500iH |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Dual-Fuel | Dual-Fuel |
| Inverter | No | Yes |
| Parallel capable | No | Yes |
| RV ready | No | Yes |
| Running watts | 7500 W | Winner: Winner: 7600 W |
| Starting watts | Winner: Winner: 9500 W | Winner: Winner: 9500 W |
| Noise (lower limit) | 74 dB | Winner: Winner: 61 dB |
| Weight | Winner: Winner: 194 lbs | 216 lbs |
| Run time @50% load | Winner: Winner: 11 h | Winner: Winner: 11 h |
| Run time @25% load | 16 h | 21 h |
| Fuel tank | 6.6 gal | 7.1 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 27.3 x 26.3 x 26.3 | 26.2 x 25 x 29.6 |
| Electrical | ||
| Voltage (AC) | 120/240 | 120/240 |
| Voltage (DC) | Not available | Not available |
| GFCI outlets | Yes | Yes |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | Yes |
| THD | 23 % | 3 % |
| Engine | ||
| Engine | 420 cc Ducar OHV 4-stroke | 459 cc OHV 4-stroke, cast iron sleeve. |
| Alternator | Not available | Not available |
| Starting system | Recoil, Electric, Remote | Recoil, Electric, Remote |
| Warranty | ||
| Warranty | 3 years | 5 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 7500 W | Not available |
| Starting watts | 9500 W | 9500 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 | 11 h | 11 h |
| Run time @25% load | 16 h | 21 h |
| Propane | Not available | Not available |
| Running watts | 6750 W | 7200 W |
| Starting watts | 8550 W | 9025 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 | Not available | 5 h |
| Run time @25% load | 8 h | 9.5 h |
| Other | ||
| Data center | Not available | Not available |
| Indicators | false | true |
| Compliance | EPA | EPA |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | true | Not available |
| UPC | 690781007932 | 811640017026 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 7500 | Not available |
| Running Watts (Propane) | 6750 | 7200 |
| Starting Watts (Gasoline) | 9500 | 9500 |
| Starting Watts (Propane) | 8550 | 9025 |
| Runtime @ 50% Load (Gasoline) | 11 | 11 |
| Runtime @ 50% Load (Propane) | Not available | 5 |
| Runtime @ 25% Load (Gasoline) | 16 | 21 |
| Runtime @ 25% Load (Propane) | 8 | 9.5 |
| AC Outlet Types | 2x Duplex 120V 20A (5-20R); 1x 120/240V 30A (L14-30R) | 2x Duplex 120V 20A (5-20R) GFCI; 1x 120/240V 30A (L14-30R); 1x 120/240V 50A (14-50R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | Ducar OHV 4-stroke | 459 cc OHV 4-stroke, cast iron sleeve. |
| Engine Displacement | 420 | 459 |
| Cylinder Sleeve | Not available | cast_iron_sleeve |
| Alternator Winding Material | Not available | Copper |
| Engine Oil Type | SAE 10W-30 | 10W-30 |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | 16 | 21 |
| Runtime @ 50% Load (Gasoline) | 11 | 11 |
| Runtime @ 50% Load (Propane) | Not available | 5 |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection | Low oil and overload protection |
| Low Oil Protection | Yes | Yes |
| Carbon Monoxide Monitoring | Yes | Yes |
| Included equipment | ||
| Included Accessories | Oil, funnel, tool kit, key fob, battery charger, propane hose, battery, and wheel kit | Funnel, tool kit, key fob, battery charger, propane hose, and battery |
| Warranty & identification | ||
| Commercial Warranty | 3 | 5 |
| Part Number | A074Z438 | Not available |
| Additional specs | ||
| Summary | The Cummins Onan P9500df is a 7500-watt dual-fuel generator built for users who need sustained power across multiple scenarios. Running on either gasoline or propane, it delivers 9500 peak watts, enough to start large air conditioning units or power multiple job site tools simultaneously. The dual-fuel architecture means users can switch between fuel sources based on availability and storage constraints. Propane tanks store longer without degradation, while gasoline offers wider accessibility. This flexibility makes the unit valuable for both seasonal backup power and year-round work environments.
The 194-pound weight and 27.3 x 26.3 x 26.3 inch footprint define this as a semi-portable unit. The included wheel kit enables movement across job sites or between storage locations, but this is not a grab-and-go machine. Users planning frequent relocation should factor in the logistical demands. The three-year commercial warranty covers manufacturing defects, giving buyers defined ownership support across the critical early-use period. | The DuroMax XP9500iH is a 7,600-watt dual-fuel inverter generator built for whole-home backup and job-site power. Running on either gasoline or propane, it delivers 9,500 starting watts to handle motor inrush demands from air conditioners, well pumps, and power tools. The inverter produces clean 3% THD power, meaning laptops, televisions, and medical equipment run safely without risk of voltage spikes. This is a stationary or semi-portable unit. At 216 pounds, it requires wheels or multiple people to move, making it suited for permanent installation or fixed-location backup rather than frequent relocation.
The fuel flexibility matters in extended outages. Gasoline runs 11 hours at half load before refueling, while propane stretches to 5 hours at the same draw. At quarter load, gasoline delivers 21 hours of runtime, propane 9.5 hours. For homeowners choosing between fuel types, gasoline offers longer intervals between refills, propane offers cleaner storage and no fuel degradation over months. |
- Most PowerfulDuroMax XP9500iH7600W running
- QuietestDuroMax XP9500iH61 dB
- Longest RuntimeCummins Onan P9500df11h at 50% load
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Cummins Onan P9500df
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