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| Specification | Cummins Onan P2500i | Aceup Energy AI2500S |
|---|---|---|
| General | ||
| Product type | Generator | Not available |
| Fuel | Gasoline | Gasoline |
| Inverter | Yes | Yes |
| Parallel capable | Yes | Yes |
| RV ready | No | Yes |
| Running watts | Winner: Winner: 2200 W | 1900 W |
| Starting watts | Winner: Winner: 2500 W | Winner: Winner: 2500 W |
| Noise (lower limit) | Winner: Winner: 52 dB | 58 dB |
| Weight | 48 lbs | Winner: Winner: 44 lbs |
| Run time @50% load | Winner: Winner: 8 h | Not available |
| Run time @25% load | 10 h | 10 h |
| Fuel tank | 1 gal | 1.32 gal |
| Fuel gauge | Yes | No |
| Approx. dimensions (L × W × H) | 19.8 x 10.5 x 18.3 | Not available |
| Electrical | ||
| Voltage (AC) | 120 | 120V |
| Voltage (DC) | 12 | 12V |
| GFCI outlets | No | No |
| Covered outlets | Yes | No |
| Automatic Voltage Regulation | Yes | No |
| THD | <3% % | 1.5 % |
| Engine | ||
| Engine | 98 cc Ducar OHV 4-stroke engine | 79.8cc 4-Stroke OHV Engine |
| Alternator | Not available | Not available |
| Starting system | Recoil | Recoil Start |
| Warranty | ||
| Warranty | 3 years | 2 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 2200 W | 1900 W |
| Starting watts | 2500 W | 2500 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 | Not available |
| Run time @25% load | 10 h | 10 h |
| Other | ||
| Data center | Not available | Not available |
| Indicators | true | true |
| Compliance | CARB, EPA | EPA Compliant |
| 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 | 1900 |
| Starting Watts (Gasoline) | 2500 | 2500 |
| Runtime @ 50% Load (Gasoline) | 8 | Not available |
| Runtime @ 25% Load (Gasoline) | 10 | 10 |
| AC Outlet Types | 1x Duplex 120V 20A (5-20R) | One 120V 5-20R 20A Outlet |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | Ducar OHV 4-stroke | 4-Stroke OHV |
| Engine Displacement | 98 | 79.8 |
| Engine Oil Type | SAE 10W30 | Not available |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | 10 | 10 |
| Runtime @ 50% Load (Gasoline) | 8 | Not available |
| Controls & display | ||
| Display Type | Not available | Intelligent Gauge |
| Idle Control System | Not available | Eco Mode |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection | Not available |
| Low Oil Protection | Yes | No |
| Carbon Monoxide Monitoring | No | No |
| Included equipment | ||
| Included Accessories | Oil, funnel, and tool kit | Not available |
| Warranty & identification | ||
| Residential Warranty | Not available | 2 |
| Part Number | Not available | AI2500S |
| 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 Aceup Energy AI2500S is a gasoline-powered inverter generator with a rated wattage of 1900 watts and a peak wattage of 2500 watts. |