Generac GP6700E Dual Fuel
#6 in Mid-sizeFull review
A mid-size dual-fuel generator for home backup at a low price, for buyers who want propane as a fallback. The 50-state fuel-injected model costs more.
Amazon $899$899
The Generac GP6700E Dual Fuel is the better portable generator overall, rated 4.3 to 3.9. The Generac GP6700E Dual Fuel leads on fuel options and run time. The Generac GP6700E Dual Fuel costs $150 less ($899 vs $1,049).
Generac GP8000E
#10 in Mid-sizeFull review
A gasoline generator for backing up most of a home’s essentials through a 30 A transfer switch at a low price. Buyers who want propane should look at a dual-fuel model.
Amazon $1,049$1,049
Prices were last checked October 28, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Generac GP6700E Dual Fuel for fuel options (gasoline or propane vs gasoline only) and run time (11 hours on a tank at 50% load vs 10 hours on a tank at 50% load).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every mid-size portable generator; a clear win is highlighted. How we rank explains each one.
| Factor weight | Generac GP6700E Dual Fuel | Generac GP8000E |
|---|---|---|
| Overall rating | 4.3/5 | 3.9/5 |
| Value 30% | 79 $0.13 per running watt | 80 $0.13 per running watt |
| Run time 15% | 70 11 hours on a tank at 50% load | 60 10 hours on a tank at 50% load |
| Fuel options 15% | 70 gasoline or propane | 0 gasoline only |
| Home hookup 15% | 100 240 V outlet for a transfer switch | 100 240 V outlet for a transfer switch |
| CO safety 10% | 100 shuts off when carbon monoxide builds up | 100 shuts off when carbon monoxide builds up |
| Warranty 10% | 50 warranty not published (neutral score used) | 67 3-year warranty |
| Starting 5% | 80 push-button electric start | 80 push-button electric start |
Specifications
| Generac GP6700E Dual Fuel | Generac GP8000E | |
|---|---|---|
| Output | ||
| Gasoline | 6,700 W running, 8,250 W starting | 8,000 W running, 10,000 W starting |
| Propane | 6,000 W running, 7,425 W starting | - |
| Outlets | L14-30 | 4 × 120 V, L14-30 |
| Transfer switch ready | Yes, 240 V | Yes, 240 V |
| Full power at 120 V | No | No |
| Price per watt | $0.13 | $0.13 |
| Fuel and run time | ||
| Fuel | Gasoline, propane | Gasoline |
| Tank | 7.5 gal | 7.9 gal |
| Run time (gasoline) | 11 hr at 50% load | 10 hr at 50% load |
| Run time (propane, 20 lb tank) | 6 hr | - |
| Engine | 340 cc | 420 cc |
| Noise and safety | ||
| CO shutoff | Yes | Yes |
| CARB compliant | No | No |
| Build | ||
| Starting | Electric and recoil | Electric and recoil |
| Wheels | Yes | Yes |
| Dimensions | - | 27.2 x 27 x 26.5 in |
| Weight | 174.2 lb | 198 lb |
| Warranty | - | 3 years |
| Released | - | 2023-12 |