Generac GP9500E Tri Fuel
#4 in LargeFull review
A large tri-fuel generator for whole-home backup through a transfer switch, best for homes with a natural gas line. It is one of the cheapest ways to get 9,500 W and three fuels.
Amazon $1,169$1,169
The Generac GP9500E Tri Fuel rates 4.3 among large portable generators; the Generac GP8000E EFI rates 3.9 among mid-size ones. The Generac GP9500E Tri Fuel costs $130 less ($1,169 vs $1,299).
Generac GP8000E EFI
#12 in Mid-sizeFull review
A fuel-injected gasoline generator for backing up a home’s essentials through a 30 A transfer switch, and the GP8000E to buy in California. Elsewhere the carbureted GP8000E does the same job for less.
Amazon $1,299$1,299
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.
Scores side by side
These two sit in different size classes (large and mid-size), and each is scored against the reference points for its own class, so a rating says how well each does among its own size peers. How we rank explains each factor.
| Factor weight | Generac GP9500E Tri Fuel | Generac GP8000E EFI |
|---|---|---|
| Overall rating | 4.3/5 | 3.9/5 |
| Value 30% | 75 $0.12 per running watt | 66 $0.16 per running watt |
| Run time 15% | 55 9.5 hours on a tank at 50% load | 80 12 hours on a tank at 50% load |
| Fuel options 15% | 100 gasoline, propane or natural gas | 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% | 67 3-year warranty | 67 3-year warranty |
| Starting 5% | 80 push-button electric start | 80 push-button electric start |
Specifications
| Generac GP9500E Tri Fuel | Generac GP8000E EFI | |
|---|---|---|
| Output | ||
| Gasoline | 9,500 W running, 12,500 W starting | 8,000 W running, 10,000 W starting |
| Propane | 8,550 W running, 11,250 W starting | - |
| Natural gas | 7,000 W running, 9,000 W starting | - |
| Outlets | 2 × 120 V, L14-30, 14-50 | 4 × 120 V, L14-30 |
| Transfer switch ready | Yes, 240 V | Yes, 240 V |
| Full power at 120 V | No | No |
| Price per watt | $0.12 | $0.16 |
| Fuel and run time | ||
| Fuel | Gasoline, propane, natural gas | Gasoline |
| Tank | 7.5 gal | 7.9 gal |
| Run time (gasoline) | 9.5 hr at 50% load | 12 hr at 50% load |
| Run time (propane, 20 lb tank) | 4.5 hr | - |
| Engine | 500 cc | 420 cc |
| Noise and safety | ||
| CO shutoff | Yes | Yes |
| CARB compliant | No | Yes |
| Build | ||
| Starting | Electric and recoil | Electric and recoil |
| Wheels | Yes | Yes |
| Dimensions | 27.5 x 27.1 x 27.6 in | 30.2 x 27.2 x 26.5 in |
| Weight | 219 lb | 207 lb |
| Warranty | 3 years | 3 years |
| Released | 2025-05 | 2025-03 |