DuroMax XP15000HX Dual Fuel vs Firman T08071 Tri-Fuel 8000W
The DuroMax XP15000HX Dual Fuel is the more powerful unit: 12,000 running watts against 8,000 — about 33% more capacity for the DuroMax XP15000HX Dual Fuel. The Firman T08071 Tri-Fuel 8000W offers more fuel flexibility (gasoline, propane, natural gas) where the DuroMax XP15000HX Dual Fuel runs on gasoline and propane.
| DuroMax XP15000HX Dual Fuel | Firman T08071 Tri-Fuel 8000W | |
|---|---|---|
| Type | portable | portable |
| Fuel | gasoline, propane | gasoline, propane, natural-gas |
| Running watts (gas / LP for standby) | 12000 W | 8000 W |
| Starting watts (gas) | 15000 W | 10000 W |
| Running watts (propane) | 11400 W | — |
| Starting watts (propane) | 14250 W | — |
| Noise level | 78 dBA | — |
| Runtime at 50% load (gas) | 12 h | 12 h |
| Fuel tank | 13.2 gal | 8 gal |
| Output voltage | 120/240V | 120/240V |
| Transfer-switch-ready outlet | 50 A | — |
| Start type | electric | electric |
| CO safety shutoff | Yes | — |
| Engine displacement | 670 cc | 439 cc |
| Weight | 345 lb | — |
Frequently asked questions
Which is more powerful, the DuroMax XP15000HX Dual Fuel or the Firman T08071 Tri-Fuel 8000W?
The DuroMax XP15000HX Dual Fuel, at 12,000 running watts on its best fuel versus 8,000 W. Remember that dual-fuel and natural-gas ratings are lower than gasoline ratings — the comparison table shows the published per-fuel figures.
Which costs less to run, the DuroMax XP15000HX Dual Fuel or the Firman T08071 Tri-Fuel 8000W?
Estimated fuel for 24 hours at about 50% load: $84 on gasoline for the DuroMax XP15000HX Dual Fuel vs $51 on gasoline for the Firman T08071 Tri-Fuel 8000W, at national average prices. These are spec-sheet-derived estimates — the assumptions are on the methodology page, and different fuels make this a cost comparison, not an efficiency ranking.
Where do these specifications come from?
Every record on BackupAtlas is hand-curated from manufacturer documentation and spec sheets, and each generator page links to its source document.