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.
- DuroMax XP11500EH
- Firman H08051
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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 | DuroMax XP11500EH | Firman H08051 |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Dual-Fuel | Dual-Fuel |
| Inverter | No | No |
| Parallel capable | No | No |
| RV ready | No | Yes |
| Running watts | Winner: Winner: 9000 W | 8000 W |
| Starting watts | Winner: Winner: 11500 W | 10000 W |
| Noise (lower limit) | Winner: Winner: 74 dB | Winner: Winner: 74 dB |
| Weight | 224 lbs | Winner: Winner: 212 lbs |
| Run time @50% load | 8 h | Winner: Winner: 12 h |
| Run time @25% load | 20 h | Not available |
| Fuel tank | 8.3 gal | 8 gal |
| Fuel gauge | No | Yes |
| Approx. dimensions (L × W × H) | 29 x 30 x 26 | 30.2 x 27.5 x 26.3 |
| Electrical | ||
| Voltage (AC) | 120/240V | 120/240 |
| Voltage (DC) | Not available | Not available |
| GFCI outlets | No | Yes |
| Covered outlets | No | Yes |
| Automatic Voltage Regulation | No | Yes |
| THD | <12% % | 25 % |
| Engine | ||
| Engine | Not available | Firman Max-Pro Series OHV 4-stroke, cast iron sleeve |
| Alternator | Not available | Not available |
| Starting system | Not available | Recoil, Electric |
| Warranty | ||
| Warranty | 3 years | 3 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | Not available | 8000 W |
| Starting watts | Not available | 10000 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 | 12 h |
| Run time @25% load | Not available | Not available |
| Propane | Not available | Not available |
| Running watts | Not available | 7250 W |
| Starting watts | Not available | 9050 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 | 5 h |
| Run time @25% load | Not available | Not available |
| Other | ||
| Data center | Not available | Not available |
| Indicators | true | false |
| Compliance | Not available | CARB, EPA |
| Security | Not available | Not available |
| Spark arrestor | No | Yes |
| Neutral | Not available | Bonded to frame |
| UPC | Not available | 840876180518 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | Not available | 8000 |
| Running Watts (Propane) | Not available | 7250 |
| Starting Watts (Gasoline) | Not available | 10000 |
| Starting Watts (Propane) | Not available | 9050 |
| Runtime @ 50% Load (Gasoline) | Not available | 12 |
| Runtime @ 50% Load (Propane) | Not available | 5 |
| AC Outlet Types | Not available | 1x Duplex 120V 20A (5-20R); 1x 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 | Not available | OHV 4-stroke |
| Engine Displacement | 457 | 439 |
| Cylinder Sleeve | Not available | Cast iron |
| Engine Oil Type | 10W-30 | Not available |
| Runtime & fuel system | ||
| Runtime @ 50% Load (Gasoline) | Not available | 12 |
| Runtime @ 50% Load (Propane) | Not available | 5 |
| Safety & compliance | ||
| Overload Protection System | Not available | Low oil and overload protection |
| Low Oil Protection | Yes | Yes |
| Included equipment | ||
| Mobility Components | Not available | Wheel kit |
| Starting Components | Not available | Recoil, Electric |
| Fuel Connection Components | Not available | Propane hose |
| Included Accessories | Not available | Oil, funnel, tool kit, propane hose, battery, and wheel kit |
| Warranty & identification | ||
| Commercial Warranty | Not available | 3 |
| Additional specs | ||
| Summary | The DuroMax XP11500EH is a 9,000-watt dual-fuel generator built for homeowners, job sites, and outdoor users who need serious power without fuel limitations. Running on gasoline or propane, it delivers 11,500 peak watts to start large loads like air conditioners, compressors, and welders. The 457cc engine produces enough current to run multiple high-demand devices simultaneously, making it suitable for whole-home backup or extended job site work.
At 224 pounds with wheels included, this unit bridges the gap between portability and raw power. The 8.3-gallon tank and dual-fuel flexibility mean fewer refueling stops on gasoline, or the option to switch to propane for storage stability and cleaner operation. Three-year warranty covers manufacturing defects across the ownership period. | The Firman H08051 is an 8,000-watt dual-fuel generator built to power job sites, homes during outages, and RV setups. Running on gasoline, it delivers 8,000 watts continuously and 10,000 watts at startup, enough to run a refrigerator, microwave, and multiple power tools at once. Switch to propane and the output drops to 7,250 watts running and 9,050 watts starting, a trade-off for fuel flexibility and longer shelf life. The 439cc cast-iron engine is engineered for durability in commercial and residential use. At 212 pounds, this is a stationary or semi-portable unit, not a grab-and-go machine. |
- Most PowerfulDuroMax XP11500EH9000W running
- QuietestDuroMax XP11500EH74 dB
- Longest RuntimeFirman H0805112h at 50% load
Where to buy
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DuroMax XP11500EH
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Firman H08051
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