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 4.0. The Generac GP6700E Dual Fuel leads on fuel options.
Generac GP6500E
#8 in Mid-sizeFull review
A mid-size gasoline generator for running a home’s essentials through a transfer switch at a low price. A good fit for buyers who don’t need propane.
Amazon $899$899
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).
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 GP6500E |
|---|---|---|
| Overall rating | 4.3/5 | 4.0/5 |
| Value 30% | 79 $0.13 per running watt | 77 $0.14 per running watt |
| Run time 15% | 70 11 hours on a tank at 50% load | 75 11.5 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 GP6500E | |
|---|---|---|
| Output | ||
| Gasoline | 6,700 W running, 8,250 W starting | 6,500 W running, 8,125 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 | $0.14 |
| Fuel and run time | ||
| Fuel | Gasoline, propane | Gasoline |
| Tank | 7.5 gal | 7.9 gal |
| Run time (gasoline) | 11 hr at 50% load | 11.5 hr at 50% load |
| Run time (propane, 20 lb tank) | 6 hr | - |
| Engine | 340 cc | 389 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 | 182 lb |
| Warranty | - | 3 years |
| Released | - | 2023-12 |