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.
- Genmax GM15000ET
- WEN DF1100X
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 | Genmax GM15000ET | WEN DF1100X |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Tri-Fuel | Dual-Fuel |
| Inverter | No | No |
| Parallel capable | No | No |
| RV ready | Yes | No |
| Running watts | Winner: Winner: 13000 W | 8300 W |
| Starting watts | Winner: Winner: 15000 W | 11000 W |
| Noise (lower limit) | Winner: Winner: 76 dB | 81 dB |
| Weight | 242 lbs | Winner: Winner: 213.8 lbs |
| Run time @50% load | Winner: Winner: 11 h | 8.5 h |
| Run time @25% load | Not available | Not available |
| Fuel tank | 10.5 gal | 6.6 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 28 x 31.6 x 28.7 | 27.3 x 20.6 x 21.9 in |
| Electrical | ||
| Voltage (AC) | 120/240 | 120/240V |
| Voltage (DC) | 12 | 12 |
| GFCI outlets | No | No |
| Covered outlets | Yes | No |
| Automatic Voltage Regulation | Yes | Yes |
| THD | 23 % | 15 % |
| Engine | ||
| Engine | 520 cc OHV 4-stroke | 457 cc OHV 4-stroke |
| Alternator | Not available | Not available |
| Starting system | Recoil, Electric, Remote | Not available |
| Warranty | ||
| Warranty | 1 years | 2 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 11000 W | 8300 W |
| Starting watts | 15000 W | 11000 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 | 11 h | 8.5 h |
| Run time @25% load | Not available | Not available |
| Natural gas | Not available | Not available |
| Running watts | 12000 W | Not available |
| Starting watts | 12000 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 | Not available | Not available |
| Propane | Not available | Not available |
| Running watts | 13000 W | 7500 W |
| Starting watts | 13000 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 | 3 h |
| Run time @25% load | Not available | Not available |
| Other | ||
| Data center | Not available | Not available |
| Indicators | true | false |
| Compliance | EPA, ANSI/PGMA G300-2023 | EPA |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | Floating | Not available |
| UPC | 760790901382 | 44459911005 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 11000 | 8300 |
| Running Watts (Propane) | 13000 | 7500 |
| Running Watts (Natural Gas) | 12000 | Not available |
| Starting Watts (Gasoline) | 15000 | 11000 |
| Starting Watts (Propane) | 13000 | Not available |
| Starting Watts (Natural Gas) | 12000 | Not available |
| Runtime @ 50% Load (Gasoline) | 11 | 8.5 |
| Runtime @ 50% Load (Propane) | Not available | 3 |
| AC Outlet Types | AC outlets3x Duplex 120V 20A (5-20R)1x 120/240V 30A (L14-30R)1x 120/240V 50A (14-50R) | 2x Duplex 120V 20A (5-20R) GFCI1x 120V 30A (L5-30R)1x 120/240V 30A (L14-30R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | OHV 4-stroke | OHV 4-stroke |
| Engine Displacement | 520 | 457 |
| Engine Oil Type | SAE 10W/30 | Not available |
| Runtime & fuel system | ||
| Runtime @ 50% Load (Gasoline) | 11 | 8.5 |
| Runtime @ 50% Load (Propane) | Not available | 3 |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection | Not available |
| Low Oil Protection | Yes | No |
| Carbon Monoxide Monitoring | Yes | Yes |
| Included equipment | ||
| Starting Components | Recoil starter; Electric starter; Remote starter | Not available |
| Included Accessories | Oil, funnel, tool kit, key fob, battery charger, natural gas hose with NPT adapter, propane hose, cover, neutral bonding plug, battery, and wheel kit | Oil, propane hose, battery, and wheel kit |
| Warranty & identification | ||
| Commercial Warranty | 1 | Not available |
| Additional specs | ||
| Summary | The Genmax GM15000ET is a 13,000-watt tri-fuel generator built for serious power demands. With 13,000 running watts and 15,000 starting watts, this unit can handle whole-house backup scenarios, including central air conditioning, refrigerators, well pumps, and multiple circuits running simultaneously. Because it runs on gasoline, propane, or natural gas, owners gain real flexibility during emergencies when one fuel source might be unavailable or during extended outages when tapping into a home natural gas line eliminates refueling trips entirely. | The WEN DF1100X is an 8,300-watt dual-fuel generator that bridges gasoline and propane operation without sacrificing peak output. Its 11,000 starting watts handle equipment startup surges, making it suitable for jobsites, emergency backup, and extended outdoor work where fuel choice matters. |
- Most PowerfulGenmax GM15000ET13000W running
- QuietestGenmax GM15000ET76 dB
- Longest RuntimeGenmax GM15000ET11h at 50% load
Where to buy
Prices can change. We update these automatically.
Genmax GM15000ET
Store links
No links yet.
WEN DF1100X
Store links
No links yet.
Disclosure: Some links may be affiliate links. Specs and comparisons are never hidden.