Generac GP6500 COsense vs WEN DF1100T Dual Fuel 11000W
The WEN DF1100T Dual Fuel 11000W is the more powerful unit: 8,300 running watts against 6,500 — about 22% more capacity for the WEN DF1100T Dual Fuel 11000W. The WEN DF1100T Dual Fuel 11000W offers more fuel flexibility (gasoline, propane) where the Generac GP6500 COsense runs on gasoline. The Generac GP6500 COsense runs longer at half load — 11.5 hours on its 7.9-gallon tank vs 8.5 hours.
| Generac GP6500 COsense | WEN DF1100T Dual Fuel 11000W | |
|---|---|---|
| Type | portable | portable |
| Fuel | gasoline | gasoline, propane |
| Running watts (gas / LP for standby) | 6500 W | 8300 W |
| Starting watts (gas) | 8125 W | 11000 W |
| Running watts (propane) | — | 7500 W |
| Starting watts (propane) | — | 9500 W |
| Runtime at 50% load (gas) | 11.5 h | 8.5 h |
| Fuel tank | 7.9 gal | 6.6 gal |
| Output voltage | 120/240V | 120/240V |
| Transfer-switch-ready outlet | 30 A | 50 A |
| Outlets | — | 4x 120V GFCI 5-20R, L5-30R, NEMA 14-50R, 12V DC |
| Start type | recoil | electric |
| CO safety shutoff | Yes | — |
| Engine displacement | 389 cc | 457 cc |
| Weight | 172 lb | 213.8 lb |
| Warranty | — | 2 yr |
Frequently asked questions
Which is more powerful, the Generac GP6500 COsense or the WEN DF1100T Dual Fuel 11000W?
The WEN DF1100T Dual Fuel 11000W, at 8,300 running watts on its best fuel versus 6,500 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 Generac GP6500 COsense or the WEN DF1100T Dual Fuel 11000W?
Estimated fuel for 24 hours at about 50% load: $53 on gasoline for the Generac GP6500 COsense vs $60 on gasoline for the WEN DF1100T Dual Fuel 11000W, 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.