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 XP15000HXT+
- Firman T12071
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 XP15000HXT+ | Firman T12071 |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Tri-Fuel | Tri-Fuel |
| Inverter | No | No |
| Parallel capable | No | No |
| RV ready | Yes | Yes |
| Running watts | Winner: Winner: 12000 W | Winner: Winner: 12000 W |
| Starting watts | Winner: Winner: 15000 W | Winner: Winner: 15000 W |
| Noise (lower limit) | Winner: Winner: 74 dB | 81 dB |
| Weight | Winner: Winner: 237 lbs | 390 lbs |
| Run time @50% load | Winner: Winner: 12 h | 11 h |
| Run time @25% load | 17.9 h | Not available |
| Fuel tank | 10.6 gal | 13.3 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 29.5 x 28 x 26 | 36 x 31.9 x 40 |
| Electrical | ||
| Voltage (AC) | 120/240V 60 Hz | 120/240V |
| Voltage (DC) | Not available | 12V |
| GFCI outlets | Yes | Yes |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | Yes |
| THD | <5% % | <5% % |
| Engine | ||
| Engine | 500 cc OHV 4-stroke, cast iron sleeve | 760 cc OHV V-Twin, cast iron sleeve |
| Alternator | Not available | Not available |
| Starting system | Recoil, Electric, Remote | Electric |
| Warranty | ||
| Warranty | 5 years | 3 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 12000 W | 12000 W |
| Starting watts | 15000 W | 15000 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 | 12 h | 11 h |
| Run time @25% load | 17.9 h | Not available |
| Natural gas | Not available | Not available |
| Running watts | 10500 W | 10000 W |
| Starting watts | 13000 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 | Not available | Not available |
| Run time @25% load | Not available | Not available |
| Propane | Not available | Not available |
| Running watts | 11400 W | 11000 W |
| Starting watts | 14250 W | 13750 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 | 2.8 h | Not available |
| Run time @25% load | 4.1 h | Not available |
| Other | ||
| Data center | Not available | Not available |
| Indicators | true | false |
| Compliance | CARB, EPA | EPA, ANSI/PGMA G300-2023 |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | Not available | true |
| UPC | 811640017156 | 840876120712 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 12000 | 12000 |
| Running Watts (Propane) | 11400 | 11000 |
| Running Watts (Natural Gas) | 10500 | 10000 |
| Starting Watts (Gasoline) | 15000 | 15000 |
| Starting Watts (Propane) | 14250 | 13750 |
| Starting Watts (Natural Gas) | 13000 | 12500 |
| Runtime @ 50% Load (Gasoline) | 12 | 11 |
| Runtime @ 50% Load (Propane) | 2.8 | Not available |
| Runtime @ 25% Load (Gasoline) | 17.9 | Not available |
| Runtime @ 25% Load (Propane) | 4.1 | Not available |
| AC Outlet Types | 2x Duplex 120V 20A (5-20R) GFCI; 2x 120/240V 50A (14-50R) | 2x Duplex 120V 20A (5-20R); 2x 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 | OHV 4-stroke, cast iron sleeve | 760 cc OHV V-Twin |
| Engine Displacement | 500 | 760 |
| Cylinder Sleeve | cast iron sleeve | cast iron sleeve |
| Alternator Winding Material | Copper windings | Copper windings |
| Engine Oil Type | 10W-30 | Full Synthetic 5W-30, 10W-40, 10W-30 |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | 17.9 | Not available |
| Runtime @ 50% Load (Gasoline) | 12 | 11 |
| Runtime @ 50% Load (Propane) | 2.8 | Not available |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection, CO monitoring | Low oil and overload protection |
| Low Oil Protection | Yes | Yes |
| Carbon Monoxide Monitoring | Yes | Yes |
| Included equipment | ||
| Included Accessories | Oil, funnel, tool kit, key fob, battery charger, natural gas hose with NPT adapter, propane hose, battery, and wheel kit | Oil, funnel, tool kit, battery charger, propane hose, battery charging cables, battery, and wheel kit |
| Warranty & identification | ||
| Residential Warranty | 5 | 3 |
| Commercial Warranty | 5 | 3 |
| Additional specs | ||
| Summary | The DuroMax XP15000HXT+ is a 12,000-watt tri-fuel generator built for serious backup power and job site work. Running on gasoline, propane, or natural gas, it delivers 15,000 peak watts and 12,000 running watts, enough to power multiple heavy loads simultaneously like refrigerators, air conditioners, and construction tools. The tri-fuel flexibility means users can choose the most available or cost-effective fuel source for their situation. This is a stationary workhorse, not a portable grab-and-go unit. At 237 pounds with a 29.5 x 28 x 26 inch footprint, it requires permanent placement or serious logistics to move. The included wheel kit helps, but this generator is built to stay put once deployed. | The Firman T12071 is a 12,000-watt tri-fuel generator that runs on gasoline, propane, or natural gas. On gasoline, it delivers 15,000 starting watts and 12,000 running watts from a 760cc V-Twin engine with cast iron sleeves. This wattage handles most household circuits simultaneously, powering refrigerators, air conditioning units, well pumps, and power tools without strain. The tri-fuel design eliminates the need to choose between fuel sources. Users in areas with natural gas lines can tap into permanent fuel supplies. Propane users gain the ability to store fuel long-term without degradation. Gasoline remains the highest-output option for maximum starting power during heavy load surges.
The 13.3-gallon fuel tank delivers 11 hours of runtime at 50 percent load on gasoline, meaning users can power a job site or home backup through a full work day or overnight without refueling. Propane cuts running watts to 11,000 and natural gas to 10,000, trading some capacity for fuel flexibility. The copper windings and low THD under 5 percent protect sensitive electronics like laptops, medical equipment, and modern televisions from voltage spikes. A 3-year residential warranty covers defects across all three fuel modes. |
- Most PowerfulDuroMax XP15000HXT+12000W running
- QuietestDuroMax XP15000HXT+74 dB
- Longest RuntimeDuroMax XP15000HXT+12h at 50% load
Where to buy
Prices can change. We update these automatically.
DuroMax XP15000HXT+
Store links
No links yet.
Firman T12071
Store links
No links yet.
Disclosure: Some links may be affiliate links. Specs and comparisons are never hidden.