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- Cummins Onan P5000iDF EFI
- Cat RP12000 E
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 P5000iDF EFI | Cat RP12000 E |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Dual-Fuel | Gasoline |
| Inverter | Yes | No |
| Parallel capable | Yes | No |
| RV ready | Yes | Yes |
| Running watts | 3900 W | Winner: Winner: 12000 W |
| Starting watts | 5000 W | Winner: Winner: 15000 W |
| Noise (lower limit) | Winner: Winner: 52 dB | 0 dB |
| Weight | Winner: Winner: 108 lbs | 350 lbs |
| Run time @50% load | Winner: Winner: 13 h | 11.7 h |
| Run time @25% load | 16.8 h | Not available |
| Fuel tank | 3.4 gal | 13.2 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 25.1 x 18.1 x 21.2 | 35.7 x 32.7 x 35.8 |
| Electrical | ||
| Voltage (AC) | 120 | 120/240 |
| Voltage (DC) | 5 | 12 |
| GFCI outlets | No | Yes |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | Yes |
| THD | 3 % | 5 % |
| Engine | ||
| Engine | 224 cc OHV 4-stroke | 670 cc Rato OHV V-Twin |
| Alternator | Not available | Not available |
| Starting system | Recoil, Electric, Remote | Electric |
| Warranty | ||
| Warranty | 3 years | 2 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 3900 W | 12000 W |
| Starting watts | 5000 W | 15000 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 | 13 h | 11.7 h |
| Run time @25% load | 16.8 h | Not available |
| Propane | Not available | Not available |
| Running watts | 3500 W | Not available |
| Starting watts | 4500 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 | Not available | Not available |
| Run time @25% load | 20 h | Not available |
| Other | ||
| Data center | Not available | Not available |
| Indicators | true | false |
| Compliance | CARB, EPA, ANSI/PGMA G300-2023 | CARB, EPA |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | Floating | true |
| UPC | Not available | 815683023891 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 3900 | 12000 |
| Running Watts (Propane) | 3500 | Not available |
| Starting Watts (Gasoline) | 5000 | 15000 |
| Starting Watts (Propane) | 4500 | Not available |
| Runtime @ 50% Load (Gasoline) | 13 | 11.7 |
| Runtime @ 25% Load (Gasoline) | 16.8 | Not available |
| Runtime @ 25% Load (Propane) | 20 | Not available |
| AC Outlet Types | 1x Duplex 120V 20A (5-20R) 1x 120V 30A (TT-30R) | 2x Duplex 120V 20A (5-20R) GFCI; 2x 120V 30A (L5-30R); 1x 120/240V 30A (L14-30R); 1x 120/240V 50A (14-50R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | 224 cc OHV 4-stroke | 670 cc Rato OHV V-Twin |
| Engine Displacement | 224 | 670 |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | 16.8 | Not available |
| Runtime @ 50% Load (Gasoline) | 13 | 11.7 |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection; CO monitoring | Low oil and overload protection |
| Low Oil Protection | Yes | Yes |
| Carbon Monoxide Monitoring | Yes | No |
| Included equipment | ||
| Starting Components | Not available | Battery, Battery Charger, Wheel Kit |
| Included Accessories | Not available | Oil, funnel, tool kit, battery charger, battery, and wheel kit |
| Warranty & identification | ||
| Commercial Warranty | 3 | Not available |
| Part Number | A075C500 | 502-3700 |
| Additional specs | ||
| Summary | The Cummins Onan P5000iDF EFI is a 3900-watt dual-fuel inverter generator built for RV owners, campers, and homeowners who need reliable portable power without excessive noise. Its 5000-watt peak capacity handles startup demands of air conditioners, power tools, and multiple appliances simultaneously. The dual-fuel design means you can run gasoline when convenient and switch to propane for longer storage life or when gasoline is unavailable. At 52 dBA, this unit operates as quietly as normal conversation, making it suitable for campgrounds and residential neighborhoods where noise restrictions apply. The inverter technology produces clean power with only 3 percent THD, protecting laptops, smartphones, and sensitive electronics from voltage spikes that damage circuits. | The Cat RP12000 E is a 12,000-watt gasoline generator built for job sites, construction crews, and homeowners who need sustained power for multiple heavy tools or appliances simultaneously. The 15,000-watt peak output handles startup surges from air compressors, circular saws, and welders without stalling. At 350 pounds, this is a stationary or semi-portable unit. It ships with a wheel kit, battery charger, and full tool set, meaning users can operate it immediately without additional purchases. |
- Most PowerfulCat RP12000 E12000W running
- QuietestCummins Onan P5000iDF EFI52 dB
- Longest RuntimeCummins Onan P5000iDF EFI13h at 50% load
Where to buy
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Cummins Onan P5000iDF EFI
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Cat RP12000 E
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