Compare Generators Side-by-Side
Select up to 4 generators to compare specs, power output, noise levels, runtime and more. Your compare URL is shareable.
- Cummins Onan P2500i
- 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 P2500i | DuroMax XP9500iH |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Gasoline | Dual-Fuel |
| Inverter | Yes | Yes |
| Parallel capable | Yes | Yes |
| RV ready | No | Yes |
| Running watts | 2200 W | Winner: Winner: 7600 W |
| Starting watts | 2500 W | Winner: Winner: 9500 W |
| Noise (lower limit) | Winner: Winner: 52 dB | 61 dB |
| Weight | Winner: Winner: 48 lbs | 216 lbs |
| Run time @50% load | 8 h | Winner: Winner: 11 h |
| Run time @25% load | 10 h | 21 h |
| Fuel tank | 1 gal | 7.1 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 19.8 x 10.5 x 18.3 | 26.2 x 25 x 29.6 |
| Electrical | ||
| Voltage (AC) | 120 | 120/240 |
| Voltage (DC) | 12 | Not available |
| GFCI outlets | No | Yes |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | Yes |
| THD | <3% % | 3 % |
| Engine | ||
| Engine | 98 cc Ducar OHV 4-stroke engine | 459 cc OHV 4-stroke, cast iron sleeve. |
| Alternator | Not available | Not available |
| Starting system | Recoil | Recoil, Electric, Remote |
| Warranty | ||
| Warranty | 3 years | 5 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 2200 W | Not available |
| Starting watts | 2500 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 | 8 h | 11 h |
| Run time @25% load | 10 h | 21 h |
| Propane | Not available | Not available |
| Running watts | Not available | 7200 W |
| Starting watts | Not available | 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 | Not available | 9.5 h |
| Other | ||
| Data center | Not available | Not available |
| Indicators | true | true |
| Compliance | CARB, EPA | EPA |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | Floating | Not available |
| UPC | 690781007918 | 811640017026 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 2200 | Not available |
| Running Watts (Propane) | Not available | 7200 |
| Starting Watts (Gasoline) | 2500 | 9500 |
| Starting Watts (Propane) | Not available | 9025 |
| Runtime @ 50% Load (Gasoline) | 8 | 11 |
| Runtime @ 50% Load (Propane) | Not available | 5 |
| Runtime @ 25% Load (Gasoline) | 10 | 21 |
| Runtime @ 25% Load (Propane) | Not available | 9.5 |
| AC Outlet Types | 1x Duplex 120V 20A (5-20R) | 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 | 98 | 459 |
| Cylinder Sleeve | Not available | cast_iron_sleeve |
| Alternator Winding Material | Not available | Copper |
| Engine Oil Type | SAE 10W30 | 10W-30 |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | 10 | 21 |
| Runtime @ 50% Load (Gasoline) | 8 | 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 | No | Yes |
| Included equipment | ||
| Included Accessories | Oil, funnel, and tool kit | Funnel, tool kit, key fob, battery charger, propane hose, and battery |
| Warranty & identification | ||
| Commercial Warranty | Not available | 5 |
| Additional specs | ||
| Summary | The Cummins Onan P2500i is a 2200-watt inverter generator built for users who need portable power without sacrificing runtime or noise control. At 48 pounds and measuring 19.8 by 10.5 by 18.3 inches, this unit bridges the gap between true portability and practical capacity. It can run a microwave, small refrigerator, or circular saw continuously, making it suitable for camping trips, job sites, tailgating, and emergency backup. The 1-gallon fuel tank delivers 10 hours at 25 percent load and 8 hours at 50 percent load, meaning most users refuel once per day rather than multiple times.
The inverter topology produces clean power with less than 3 percent THD, which protects laptops, phone chargers, and sensitive electronics from voltage spikes. Cummins backs this unit with a 3-year warranty, longer than the 2.4-year average for comparable inverter generators. The 52 dBA noise level sits between a normal conversation and light traffic, allowing operation in noise-restricted campgrounds and residential neighborhoods without drawing complaints. | 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
- QuietestCummins Onan P2500i52 dB
- Longest RuntimeDuroMax XP9500iH11h at 50% load
Where to buy
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Cummins Onan P2500i
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DuroMax XP9500iH
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