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 P4500i
- Sportsman GEN2000DF
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 P4500i | Sportsman GEN2000DF |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Gasoline | Dual-Fuel |
| Inverter | Yes | No |
| Parallel capable | Yes | No |
| RV ready | Yes | No |
| Running watts | Winner: Winner: 3700 W | 1400 W |
| Starting watts | Winner: Winner: 4500 W | 2000 W |
| Noise (lower limit) | Winner: Winner: 52 dB | 68 dB |
| Weight | 98 lbs | Winner: Winner: 53 lbs |
| Run time @50% load | Winner: Winner: 15 h | 9 h |
| Run time @25% load | 18 h | Not available |
| Fuel tank | 3.4 gal | 1.2 gal |
| Fuel gauge | Yes | No |
| Approx. dimensions (L × W × H) | 24.5 x 18.3 x 20.5 | 18.5 x 16 x 14.8 |
| Electrical | ||
| Voltage (AC) | 120 | 120 |
| Voltage (DC) | 5 | 12 |
| GFCI outlets | No | No |
| Covered outlets | Yes | No |
| Automatic Voltage Regulation | Yes | No |
| THD | 3 % | Not available |
| Engine | ||
| Engine | 224 cc Ducar OHV 4-stroke | 94 cc 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 | 1400 W |
| Starting watts | 4500 W | 2000 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 | 9 h |
| Run time @25% load | 18 h | Not available |
| Propane | Not available | Not available |
| Running watts | Not available | 1200 W |
| Starting watts | Not available | 1800 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 | 12 h |
| Run time @25% load | Not available | Not available |
| Other | ||
| Data center | Not available | Not available |
| Indicators | true | false |
| Compliance | CARB, EPA | EPA |
| Security | Not available | Not available |
| Spark arrestor | Yes | No |
| Neutral | Floating | Not available |
| UPC | 690781007925 | 27077801477 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 3700 | 1400 |
| Running Watts (Propane) | Not available | 1200 |
| Starting Watts (Gasoline) | 4500 | 2000 |
| Starting Watts (Propane) | Not available | 1800 |
| Runtime @ 50% Load (Gasoline) | 15 | 9 |
| Runtime @ 50% Load (Propane) | Not available | 12 |
| Runtime @ 25% Load (Gasoline) | 18 | Not available |
| 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 | OHV 4-stroke |
| Engine Displacement | 224 | 94 |
| Engine Oil Type | 10W30 | SAE10W-30 |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | 18 | Not available |
| Runtime @ 50% Load (Gasoline) | 15 | 9 |
| Runtime @ 50% Load (Propane) | Not available | 12 |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection | Low oil and overload protection |
| Low Oil Protection | Yes | No |
| Included equipment | ||
| Included Accessories | Oil, funnel, tool kit, key fob, battery charger, and battery | Tool kit, propane hose, and battery charging cables. |
| Warranty & identification | ||
| Commercial Warranty | 3 | 1 |
| 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 Sportsman GEN2000DF is a dual fuel generator capable of delivering 2000 surge watts and 1400 running watts, suitable for powering small household appliances during emergencies or outdoor activities. |
- Most PowerfulCummins Onan P4500i3700W running
- QuietestCummins Onan P4500i52 dB
- Longest RuntimeCummins Onan P4500i15h at 50% load
Where to buy
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Cummins Onan P4500i
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Sportsman GEN2000DF
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