Firman T08071 Tri-Fuel 8000W vs Generac GP8000E COsense
Both units carry the same best-fuel running rating: 8,000 W. The Firman T08071 Tri-Fuel 8000W offers more fuel flexibility (gasoline, propane, natural gas) where the Generac GP8000E COsense runs on gasoline. The Firman T08071 Tri-Fuel 8000W runs longer at half load — 12 hours on its 8-gallon tank vs 10 hours.
| Firman T08071 Tri-Fuel 8000W | Generac GP8000E COsense | |
|---|---|---|
| Type | portable | portable |
| Fuel | gasoline, propane, natural-gas | gasoline |
| Running watts (gas / LP for standby) | 8000 W | 8000 W |
| Starting watts (gas) | 10000 W | 10000 W |
| Runtime at 50% load (gas) | 12 h | 10 h |
| Fuel tank | 8 gal | 7.9 gal |
| Output voltage | 120/240V | 120/240V |
| Transfer-switch-ready outlet | — | 30 A |
| Start type | electric | electric |
| CO safety shutoff | — | Yes |
| Engine displacement | 439 cc | 420 cc |
| Weight | — | 198 lb |
Frequently asked questions
Which costs less to run, the Firman T08071 Tri-Fuel 8000W or the Generac GP8000E COsense?
Estimated fuel for 24 hours at about 50% load: $51 on gasoline for the Firman T08071 Tri-Fuel 8000W 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.