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
- Westinghouse WGen9500DF
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 | Westinghouse WGen9500DF |
|---|---|---|
| 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 | 9500 W |
| Starting watts | Winner: Winner: 15000 W | 12500 W |
| Noise (lower limit) | 76 dB | Winner: Winner: 74 dB |
| Weight | 242 lbs | Winner: Winner: 211 lbs |
| Run time @50% load | Winner: Winner: 11 h | 8 h |
| Run time @25% load | Not available | 12 h |
| Fuel tank | 10.5 gal | 6.6 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 28 x 31.6 x 28.7 | 27.2 x 26.1 x 26.5 |
| Electrical | ||
| Voltage (AC) | 120/240 | 120/240V 60 Hz |
| Voltage (DC) | 12 | Not available |
| GFCI outlets | No | Yes |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | Yes |
| THD | 23 % | Not available |
| Engine | ||
| Engine | 520 cc OHV 4-stroke | Westinghouse OHV 4-stroke, cast iron sleeve |
| Alternator | Not available | Not available |
| Starting system | Recoil, Electric, Remote | Recoil, Electric, Remote |
| Warranty | ||
| Warranty | 1 years | 3 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 11000 W | 9500 W |
| Starting watts | 15000 W | 12500 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 h |
| Run time @25% load | Not available | 12 h |
| 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 | 8500 W |
| Starting watts | 13000 W | 11200 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 | 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 | Floating | true |
| UPC | 760790901382 | 853544008298 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 11000 | 9500 |
| Running Watts (Propane) | 13000 | 8500 |
| Running Watts (Natural Gas) | 12000 | Not available |
| Starting Watts (Gasoline) | 15000 | 12500 |
| Starting Watts (Propane) | 13000 | 11200 |
| Starting Watts (Natural Gas) | 12000 | Not available |
| Runtime @ 50% Load (Gasoline) | 11 | 8 |
| Runtime @ 25% Load (Gasoline) | Not available | 12 |
| 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); 1x 120/240V 30A (L14-30R); 1x 120/240V 50A (14-50R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | OHV 4-stroke | OHV 4-stroke, cast iron sleeve |
| Engine Displacement | 520 | 457 |
| Cylinder Sleeve | Not available | Cast iron sleeve |
| Engine Oil Type | SAE 10W/30 | SAE 10W-30 |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | Not available | 12 |
| Runtime @ 50% Load (Gasoline) | 11 | 8 |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection | Low oil and overload protection |
| Low Oil Protection | Yes | Yes |
| Carbon Monoxide Monitoring | Yes | No |
| Included equipment | ||
| Mobility Components | Not available | Yes |
| 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, funnel, tool kit, key fob, battery charger, propane hose, battery, and wheel kit |
| Warranty & identification | ||
| Residential Warranty | Not available | 3 |
| Commercial Warranty | 1 | 3 |
| 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 Westinghouse WGen9500DF is a dual fuel portable generator capable of producing up to 12,500 peak watts and 9,500 running watts on gasoline, and 11,200 peak watts and 8,500 running watts on propane. It features a 457cc 4-Stroke OHV engine, push-button electric start with remote key fob, and a VFT Data Center displaying real-time information. Designed for home backup, job sites, or recreational use, it offers up to 12 hours of run time on a 6.6-gallon fuel tank. |
- Most PowerfulGenmax GM15000ET13000W running
- QuietestWestinghouse WGen9500DF74 dB
- Longest RuntimeGenmax GM15000ET11h at 50% load
Where to buy
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Genmax GM15000ET
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Westinghouse WGen9500DF
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