Last updated September 21, 2026
DuroMax XP15000HXT Tri-Fuel Review
12,000 running watts on gas, propane, or natural gas — DuroMax's biggest tri-fuel bridges the gap between the XP13000HXT and Westinghouse's 20,000-watt flagship.
The verdict
The XP15000HXT exists for the households that do the load math on the XP13000HXT and come up short: central AC plus a well pump plus the rest of the house pushes past 10,500 running watts, but a $3,900 WGen20000TFc is more machine — and more money — than the job needs. At 12,000 running watts on gasoline (10,260 on natural gas) through the same proven tri-fuel formula, it's the reasonable middle step, built around the largest single-cylinder engine in the category.
Typical price: ~$2,500 (typical street price — current price shown on Amazon)
Buy on AmazonWhat we like
- +12,000 running / 15,000 peak watts on gasoline — DuroMax's highest-output tri-fuel portable
- +Tri-fuel: gasoline, propane, or natural gas, selectable from one dial
- +670cc single-cylinder engine — the largest single-cylinder tri-fuel engine on the market, built for sustained heavy loads
- +13.2-gallon tank runs about 12 hours at 50% load on gasoline; unlimited runtime on natural gas
- +50A outlet plus remote, electric, and recoil start; CO Alert auto-shutoff standard
What to know
- −362 lb — this lives where you park it, not something you tow to the cabin
- −72 dBA at 23 ft under load — loud like every open-frame machine this size
- −Natural gas derates output to 10,260 running watts — do the load math before counting on NG for everything
- −At $2,500 it sits closer to the Westinghouse WGen20000TFc than to its own XP13000HXT sibling — confirm you actually need the extra headroom before stepping up
Full review
The DuroMax tri-fuel lineup used to have a gap: the XP13000HXT tops out at 10,500 running watts on gasoline, and the next step up was the Westinghouse WGen20000TFc — nearly double the output at nearly triple the price. The XP15000HXT fills that gap with 12,000 running watts on gasoline, built around a 670cc single-cylinder engine DuroMax calls the largest of its kind on the market, on the strength of the same fuel-selector-dial simplicity the smaller HXT is known for.
The natural-gas math is the number to plan around: 10,260 running watts on NG is still enough for central AC plus the rest of a large home's essentials, and once it's plumbed to a gas line the runtime question disappears the way it does on every tri-fuel DuroMax. The 13.2-gallon tank is sized for the bigger engine's appetite — about 12 hours at half load on gasoline, which is respectable but not class-leading for the tank size.
The honest positioning question is whether you need this over the XP13000HXT at all. The price gap between the two is real, and at 362 pounds this is meaningfully heavier than its sibling. For the specific household whose backup math lands between 10,500 and 20,000 running watts, it's the right-sized answer; for everyone else, the XP13000HXT or the Westinghouse iGen12000TFc's quieter inverter output are worth a look first.
Best for: Large homes and shops whose tri-fuel load math comes out above the XP13000HXT's 10,500 running watts but doesn't need the Westinghouse WGen20000TFc's full 20,000.
Specifications
| Running watts | 12,000 (gas) / 11,400 (LP) / 10,260 (NG) |
|---|---|
| Peak watts | 15,000 (gas) / 14,250 (LP) / 12,825 (NG) |
| Fuel | Gasoline / propane / natural gas (tri fuel) |
| Tank / runtime | 13.2 gal — ~12 hr @ 50% load (gas); unlimited on NG |
| Engine | 670cc OHV, single-cylinder, oil-cooled |
| Noise | ~72 dBA @ 23 ft, 75% load |
| Outlets | 14-50R (50A), L14-30R, 10× household outlets |
| Start | Remote, electric, recoil |
| Weight | 362 lb |
| Warranty | 5 years |
Ready to get one?
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~$2,500 typical price
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