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
- Westinghouse iGen5000DF
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 | Westinghouse iGen5000DF |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Gasoline | Dual-Fuel |
| Inverter | Yes | Yes |
| Parallel capable | Yes | Yes |
| RV ready | Yes | Yes |
| Running watts | 3700 W | Winner: Winner: 3900 W |
| Starting watts | 4500 W | Winner: Winner: 5000 W |
| Noise (lower limit) | Winner: Winner: 52 dB | Winner: Winner: 52 dB |
| Weight | Winner: Winner: 98 lbs | 104.7 lbs |
| Run time @50% load | Winner: Winner: 15 h | Winner: Winner: 15 h |
| Run time @25% load | 18 h | 18 h |
| Fuel tank | 3.4 gal | 3.4 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 24.5 x 18.3 x 20.5 | 24.5 x 17.5 x 20 |
| 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 | 224 cc Westinghouse OHV 4-stroke |
| Alternator | Not available | Not available |
| Starting system | Recoil; Electric; Remote | Recoil, Electric, Remote |
| Warranty | ||
| Warranty | 3 years | 3 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 3700 W | 3900 W |
| Starting watts | 4500 W | 5000 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 | 15 h |
| Run time @25% load | 18 h | 18 h |
| Propane | Not available | Not available |
| Running watts | Not available | 3500 W |
| Starting watts | Not available | 4500 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 | Not available |
| Run time @25% load | Not available | 22 h |
| Other | ||
| Data center | Not available | Not available |
| Indicators | true | true |
| Compliance | CARB, EPA | CARB, EPA |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | Floating | Floating |
| UPC | 690781007925 | 850011336540 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 3700 | 3900 |
| Running Watts (Propane) | Not available | 3500 |
| Starting Watts (Gasoline) | 4500 | 5000 |
| Starting Watts (Propane) | Not available | 4500 |
| Runtime @ 50% Load (Gasoline) | 15 | 15 |
| Runtime @ 25% Load (Gasoline) | 18 | 18 |
| Runtime @ 25% Load (Propane) | Not available | 22 |
| AC Outlet Types | 1x Duplex 120V 20A (5-20R); 1x 120V 30A (TT-30R) | 1x Duplex 120V 20A (5-20R); 1x 120V 30A (TT-30R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | Ducar OHV 4-stroke | OHV 4-stroke |
| Engine Displacement | 224 | 224 |
| Engine Oil Type | 10W30 | Not available |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | 18 | 18 |
| Runtime @ 50% Load (Gasoline) | 15 | 15 |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection | Low oil and overload protection |
| Low Oil Protection | Yes | Yes |
| Carbon Monoxide Monitoring | No | No |
| Included equipment | ||
| Starting Components | Not available | Recoil, Electric, Remote |
| Included Accessories | Oil, funnel, tool kit, key fob, battery charger, and battery | Oil, funnel, tool kit, key fob, battery charger, propane hose, and battery |
| Warranty & identification | ||
| Commercial Warranty | 3 | 3 |
| 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 Westinghouse iGen5000DF is a dual fuel inverter generator that offers 5,000 peak watts and 3,900 rated watts on gasoline, and 4,500 peak watts and 3,500 rated watts on propane. It features a remote start, LED display, and operates quietly, making it suitable for camping, tailgating, RVs, and home backup. |
- Most PowerfulWestinghouse iGen5000DF3900W running
- QuietestCummins Onan P4500i52 dB
- Longest RuntimeCummins Onan P4500i15h at 50% load
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Cummins Onan P4500i
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Westinghouse iGen5000DF
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