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| Specification | Cummins Onan P4500i | Genmax GM2200i |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Gasoline | Gasoline |
| Inverter | Yes | Yes |
| Parallel capable | Yes | Yes |
| RV ready | Yes | No |
| Running watts | Winner: Winner: 3700 W | 1800 W |
| Starting watts | Winner: Winner: 4500 W | 2200 W |
| Noise (lower limit) | Winner: Winner: 52 dB | 58 dB |
| Weight | 98 lbs | Winner: Winner: 41.9 lbs |
| Run time @50% load | Winner: Winner: 15 h | 6 h |
| Run time @25% load | 18 h | 8 h |
| Fuel tank | 3.4 gal | 1 gal |
| Fuel gauge | Yes | No |
| Approx. dimensions (L × W × H) | 24.5 x 18.3 x 20.5 | 18.9 x 11.4 x 17.3 |
| Electrical | ||
| Voltage (AC) | 120 | 120 |
| Voltage (DC) | 5 | 5 |
| GFCI outlets | No | No |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | Yes |
| THD | 3 % | <3% % |
| Engine | ||
| Engine | 224 cc Ducar OHV 4-stroke | 79.7 cc Dinking OHV 4-stroke |
| Alternator | Not available | Not available |
| Starting system | Recoil; Electric; Remote | Recoil |
| Warranty | ||
| Warranty | 3 years | 1 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 3700 W | 1800 W |
| Starting watts | 4500 W | 2200 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 | 15 h | 6 h |
| Run time @25% load | 18 h | 8 h |
| Other | ||
| Data center | Not available | Not available |
| Indicators | true | true |
| Compliance | CARB, EPA | EPA, ANSI/PGMA G300-2023 |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | Floating | Not available |
| UPC | 690781007925 | 738349925141 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 3700 | 1800 |
| Starting Watts (Gasoline) | 4500 | 2200 |
| Runtime @ 50% Load (Gasoline) | 15 | 6 |
| Runtime @ 25% Load (Gasoline) | 18 | 8 |
| AC Outlet Types | 1x Duplex 120V 20A (5-20R); 1x 120V 30A (TT-30R) | 1x Duplex 120V 20A (5-20R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | Ducar OHV 4-stroke | Dinking OHV 4-stroke |
| Engine Displacement | 224 | 79.7 |
| Engine Oil Type | 10W30 | 10W-30 |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | 18 | 8 |
| Runtime @ 50% Load (Gasoline) | 15 | 6 |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection | Low oil and overload protection, CO monitoring |
| Low Oil Protection | Yes | Yes |
| Carbon Monoxide Monitoring | No | Yes |
| Included equipment | ||
| Included Accessories | Oil, funnel, tool kit, key fob, battery charger, and battery | Funnel and tool kit |
| Warranty & identification | ||
| Commercial Warranty | 3 | Not available |
| Part Number | A058U955 | Not available |
| Additional specs | ||
| Summary | The Cummins Onan P4500i is a 3700-watt inverter generator built for users who need reliable power without the noise penalty. Its 4500-watt peak capacity handles startup surges for air conditioners, power tools, and RV air conditioning units. The gasoline engine runs clean enough for sensitive electronics like laptops and phones, thanks to a 3 percent THD rating that protects against voltage spikes. This unit bridges the gap between portable camping generators and stationary backup power, making it useful for RV owners, homeowners facing extended outages, and contractors working near occupied spaces. | The GENMAX GM2200i is a 2200-watt gasoline inverter generator featuring a 79.7cc engine, CO detection, and parallel capability, designed for quiet and efficient power supply. |
