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.
- WEN DF680iX
- Cat RP5500
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 | WEN DF680iX | Cat RP5500 |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Dual-Fuel | Gasoline |
| Inverter | Yes | No |
| Parallel capable | Yes | No |
| RV ready | Yes | No |
| Running watts | 5100 W | Winner: Winner: 5500 W |
| Starting watts | 6800 W | Winner: Winner: 6875 W |
| Noise (lower limit) | Winner: Winner: 64 dB | 0 dB |
| Weight | Winner: Winner: 94.8 lbs | 178 lbs |
| Run time @50% load | 6.1 h | Winner: Winner: 15 h |
| Run time @25% load | Not available | Not available |
| Fuel tank | 2.9 gal | 7.9 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 22.8 x 16.6 x 19.7 | 32.9 x 27.4 x 24.7 |
| Electrical | ||
| Voltage (AC) | 120/240 | 120/240 |
| Voltage (DC) | 12 | Not available |
| GFCI outlets | No | Yes |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | Yes |
| THD | 1.2 % | Not available |
| Engine | ||
| Engine | 224 cc OHV 4-stroke | 300 cc OHV 4-stroke |
| Alternator | Not available | Not available |
| Starting system | Recoil, Electric | Recoil |
| Warranty | ||
| Warranty | 3 years | 2 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 5100 W | 5500 W |
| Starting watts | 6800 W | 6875 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 | 6.1 h | 15 h |
| Run time @25% load | Not available | Not available |
| Propane | Not available | Not available |
| Running watts | 4500 W | Not available |
| Starting watts | 6000 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 | 9 h | Not available |
| Run time @25% load | Not available | Not available |
| Other | ||
| Data center | Not available | Not available |
| Indicators | true | false |
| Compliance | EPA, ANSI/PGMA G300-2023 | CARB, EPA |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | true | Not available |
| UPC | 44459096801 | 815683020036 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 5100 | 5500 |
| Running Watts (Propane) | 4500 | Not available |
| Starting Watts (Gasoline) | 6800 | 6875 |
| Starting Watts (Propane) | 6000 | Not available |
| Runtime @ 50% Load (Gasoline) | 6.1 | 15 |
| Runtime @ 50% Load (Propane) | 9 | Not available |
| AC Outlet Types | 1x Duplex 120V 20A (5-20R); 1x 120V 30A (TT-30R); 1x 120/240V 30A (L14-30R) | 2x Duplex 120V 20A (5-20R) GFCI, 1x 120/240V 30A (L14-30R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | OHV 4-stroke | OHV 4-stroke |
| Engine Displacement | 224 | 300 |
| Engine Oil Type | Not available | SAE 30 or 10W-30 |
| Runtime & fuel system | ||
| Runtime @ 50% Load (Gasoline) | 6.1 | 15 |
| Runtime @ 50% Load (Propane) | 9 | Not available |
| Safety & compliance | ||
| Overload Protection System | Not available | Low oil and overload protection |
| Low Oil Protection | Yes | Yes |
| Carbon Monoxide Monitoring | Yes | No |
| Included equipment | ||
| Included Accessories | Oil, funnel, tool kit, propane hose, and battery | Oil, funnel, tool kit, and wheel kit |
| Warranty & identification | ||
| Part Number | Not available | 502-3686 |
| Additional specs | ||
| Summary | The WEN DF680iX is a 6800-watt dual fuel inverter generator designed for versatility and convenience, featuring electric start, CO shutdown sensor, and compatibility with both gasoline and propane fuels. | The Cat RP5500 is a 5500-watt gasoline generator built for homeowners, contractors, and outdoor enthusiasts who need reliable backup power without the complexity of larger units. This wattage tier handles most household circuits simultaneously, meaning you can run a refrigerator, well pump, and power tools at the same time, but not your entire home's air conditioning system. The 6875-watt peak capacity gives it the muscle to start high-inrush devices like compressors and sump pumps without stalling. Because the RP5500 runs on gasoline, fuel is available at any gas station, eliminating the supply chain friction of propane or diesel models. The 7.9-gallon tank paired with 15-hour runtime at half load means you refuel roughly once per day under typical use, not every few hours. |
- Most PowerfulCat RP55005500W running
- QuietestWEN DF680iX64 dB
- Longest RuntimeCat RP550015h at 50% load
Where to buy
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WEN DF680iX
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Cat RP5500
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