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Select up to 4 generators to compare specs, power output, noise levels, runtime and more. Your compare URL is shareable.
- Cummins Onan P2500i
- Predator 72899
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 | Predator 72899 |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Gasoline | Gasoline |
| Inverter | Yes | Yes |
| Parallel capable | Yes | No |
| RV ready | No | No |
| Running watts | 2200 W | Winner: Winner: 3000 W |
| Starting watts | 2500 W | Winner: Winner: 3500 W |
| Noise (lower limit) | Winner: Winner: 52 dB | 56 dB |
| Weight | Winner: Winner: 48 lbs | 102 lbs |
| Run time @50% load | Winner: Winner: 8 h | Not available |
| Run time @25% load | 10 h | 11 h |
| Fuel tank | 1 gal | Not available |
| Fuel gauge | Yes | No |
| Approx. dimensions (L × W × H) | 19.8 x 10.5 x 18.3 | 22.75 x 17.3 x 20 |
| Electrical | ||
| Voltage (AC) | 120 | 120V |
| Voltage (DC) | 12 | Not available |
| GFCI outlets | No | No |
| Covered outlets | Yes | No |
| Automatic Voltage Regulation | Yes | No |
| THD | <3% % | Not available |
| Engine | ||
| Engine | 98 cc Ducar OHV 4-stroke engine | Not available |
| Alternator | Not available | Not available |
| Starting system | Recoil | Not available |
| Warranty | ||
| Warranty | 3 years | Not available |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 2200 W | Not available |
| Starting watts | 2500 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 | 8 h | Not available |
| Run time @25% load | 10 h | Not available |
| Other | ||
| Data center | Not available | Not available |
| Indicators | true | Not available |
| Compliance | CARB, EPA | Not available |
| Security | Not available | Not available |
| Spark arrestor | Yes | No |
| Neutral | Floating | Not available |
| UPC | 690781007918 | Not available |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 2200 | Not available |
| Starting Watts (Gasoline) | 2500 | Not available |
| Runtime @ 50% Load (Gasoline) | 8 | Not available |
| Runtime @ 25% Load (Gasoline) | 10 | Not available |
| AC Outlet Types | 1x Duplex 120V 20A (5-20R) | Not available |
| Electrical & power | ||
| Frequency | 60 | Not available |
| Engine & construction | ||
| Engine Type | Ducar OHV 4-stroke | Not available |
| Engine Displacement | 98 | 212 |
| Engine Oil Type | SAE 10W30 | Not available |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | 10 | Not available |
| Runtime @ 50% Load (Gasoline) | 8 | Not available |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection | Not available |
| Low Oil Protection | Yes | Yes |
| Included equipment | ||
| Included Accessories | Oil, funnel, and tool kit | Not available |
| 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 Predator 72899 is a 3500 Watt Super Quiet Inverter Generator designed for efficient and quiet operation, suitable for various applications including RVs. |
- Most PowerfulPredator 728993000W running
- QuietestCummins Onan P2500i52 dB
- Longest RuntimeCummins Onan P2500i8h at 50% load
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Cummins Onan P2500i
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Predator 72899
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