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- Generac #7247 XT8500EFI
- Westinghouse WGen20000TFc
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 | Generac #7247 XT8500EFI | Westinghouse WGen20000TFc |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Gasoline | Tri-Fuel |
| Inverter | No | No |
| Parallel capable | No | No |
| RV ready | No | Yes |
| Running watts | 8500 W | Winner: Winner: 20000 W |
| Starting watts | 10000 W | Winner: Winner: 28000 W |
| Noise (lower limit) | 0 dB | Winner: Winner: 79 dB |
| Weight | Winner: Winner: 214 lbs | 557 lbs |
| Run time @50% load | 9 h | Winner: Winner: 10.5 h |
| Run time @25% load | Not available | 13 h |
| Fuel tank | 8 gal | 17.17 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 31.4 x 20.5 x 26.5 | 38 x 35 x 40.4 |
| Electrical | ||
| Voltage (AC) | 120/240 | 120/240 |
| Voltage (DC) | Not available | Not available |
| GFCI outlets | Yes | Yes |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | Yes |
| THD | 5 % | 5 % |
| Engine | ||
| Engine | Generac OHV 4-stroke | 999 cc OHV V-Twin, cast iron sleeve |
| Alternator | Not available | Not available |
| Starting system | Recoil, Electric | Electric, Remote |
| Warranty | ||
| Warranty | 3 years | 3 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 8500 W | 20000 W |
| Starting watts | 10000 W | 28000 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 | 9 h | 10.5 h |
| Run time @25% load | Not available | 13 h |
| Natural gas | Not available | Not available |
| Running watts | Not available | 16000 W |
| Starting watts | Not available | 22400 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 |
| Propane | Not available | Not available |
| Running watts | Not available | 18000 W |
| Starting watts | Not available | 25500 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 | 2.5 h |
| Run time @25% load | Not available | 3 h |
| Other | ||
| Data center | Not available | Not available |
| Indicators | false | false |
| Compliance | CARB, EPA | EPA, ANSI/PGMA G300-2023 |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | true | Bonded Neutral |
| UPC | 696471078336 | 850032657785 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 8500 | 20000 |
| Running Watts (Propane) | Not available | 18000 |
| Running Watts (Natural Gas) | Not available | 16000 |
| Starting Watts (Gasoline) | 10000 | 28000 |
| Starting Watts (Propane) | Not available | 25500 |
| Starting Watts (Natural Gas) | Not available | 22400 |
| Runtime @ 50% Load (Gasoline) | 9 | 10.5 |
| Runtime @ 50% Load (Propane) | Not available | 2.5 |
| Runtime @ 25% Load (Gasoline) | Not available | 13 |
| Runtime @ 25% Load (Propane) | Not available | 3 |
| AC Outlet Types | 2x Duplex 120V 20A (5-20R) GFCI1x 120/240V 30A (L14-30R) | 2x Duplex 120V 20A (5-20R) GFCI; 1x 120V 30A (L5-30R); 2x 120/240V 30A (L14-30R); 2x 120/240V 50A (14-50R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | OHV 4-stroke | 999 cc OHV V-Twin, cast iron sleeve |
| Engine Displacement | 459 | 999 |
| Cylinder Sleeve | Not available | Cast Iron Sleeve |
| Alternator Winding Material | Not available | Copper windings |
| Engine Oil Type | 10W-30 / SAE 30 | SAE 10W-30 |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | Not available | 13 |
| Runtime @ 50% Load (Gasoline) | 9 | 10.5 |
| Runtime @ 50% Load (Propane) | Not available | 2.5 |
| Outlets & connections | ||
| Transfer Switch Compatibility | Not available | Yes |
| Controls & display | ||
| Display Type | Not available | VFT Display |
| Idle Control System | Not available | Low Idle Control |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection | Low oil and overload protection |
| Low Oil Protection | Yes | Yes |
| Carbon Monoxide Monitoring | Yes | Yes |
| Included equipment | ||
| Mobility Components | Not available | Wheels, Handles |
| Starting Components | Oil, funnel, battery charger, battery | Electric start, Remote start |
| Fuel Connection Components | Not available | natural gas hose with NPT adapter, propane hose |
| Maintenance Components | Not available | Oil Bottle, Oil Funnel, Spark Plug Wrench |
| Documentation | Not available | User Manual |
| Included Accessories | Oil, funnel, battery charger, battery, and wheel kit | Oil, funnel, tool kit, key fob, battery charger, natural gas hose with NPT adapter, propane hose, battery, and wheel kit |
| Warranty & identification | ||
| Residential Warranty | Not available | 3 Year Limited |
| Commercial Warranty | 3 | 1 Year Limited |
| Part Number | Not available | WGen20000TFc |
| Additional specs | ||
| Summary | The Generac XT8500EFI is an 8,500-watt gasoline generator built for whole-house backup and job site power. With 10,000 starting watts, it can simultaneously run a central air conditioner, refrigerator, sump pump, and lighting circuits, or power multiple heavy-draw tools on a work site. Electronic fuel injection delivers consistent performance and fuel economy, while the 8-gallon tank and 9-hour runtime at 50% load mean a full workday or overnight outage before refueling. | The Westinghouse WGen20000TFc is a 20,000-watt tri-fuel generator built for high-demand applications where fuel flexibility matters. Tri-fuel operation means you can run gasoline for peak output, natural gas for stationary backup, or propane for portable fuel options. This wattage class handles whole-house backup, large job sites, and RV power simultaneously without compromise. The tri-fuel design trades simplicity for adaptability, letting you choose the fuel source that matches your situation rather than locking you into one supply chain. |
- Most PowerfulWestinghouse WGen20000TFc20000W running
- QuietestWestinghouse WGen20000TFc79 dB
- Longest RuntimeWestinghouse WGen20000TFc10.5h at 50% load
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Generac #7247 XT8500EFI
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Westinghouse WGen20000TFc
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