DuroMax XP15000HX Dual Fuel vs Generac GP8000E COsense
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 DuroMax XP15000HX Dual Fuel offers more fuel flexibility (gasoline, propane) where the Generac GP8000E COsense runs on gasoline. The DuroMax XP15000HX Dual Fuel runs longer at half load — 12 hours on its 13.2-gallon tank vs 10 hours.
| DuroMax XP15000HX Dual Fuel | Generac GP8000E COsense | |
|---|---|---|
| Type | portable | portable |
| Fuel | gasoline, propane | gasoline |
| 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 | 10 h |
| Fuel tank | 13.2 gal | 7.9 gal |
| Output voltage | 120/240V | 120/240V |
| Transfer-switch-ready outlet | 50 A | 30 A |
| Start type | electric | electric |
| CO safety shutoff | Yes | Yes |
| Engine displacement | 670 cc | 420 cc |
| Weight | 345 lb | 198 lb |
Frequently asked questions
Which is more powerful, the DuroMax XP15000HX Dual Fuel or the Generac GP8000E COsense?
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 Generac GP8000E COsense?
Estimated fuel for 24 hours at about 50% load: $84 on gasoline for the DuroMax XP15000HX Dual Fuel vs $61 on gasoline for the Generac GP8000E COsense, 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.