Generac GP9500E Tri Fuel EFI
#11 in LargeFull review
A large tri-fuel generator with fuel injection for whole-home backup, and the version to buy in California. Elsewhere the carbureted GP9500E does the same job for less.
Amazon $1,399$1,399
The Generac GP9500E Tri Fuel EFI is the better portable generator overall, rated 4.2 to 3.0. The Generac GP9500E Tri Fuel EFI leads on value, fuel options and run time. The Generac GP9500E Tri Fuel EFI costs $4,600 less ($1,399 vs $5,999).
Honda EB10000
#25 in LargeFull review
A commercial generator for contractors and rental fleets who run it every day and need it to last. For home backup, consumer tri-fuel models deliver the same power for a fraction of the price.
Amazon $5,999$5,999
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 GP9500E Tri Fuel EFI for value ($0.15 per running watt vs $0.67 per running watt), fuel options (gasoline, propane or natural gas vs gasoline only) and run time (10.5 hours on a tank at 50% load vs 7.9 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 large portable generator; a clear win is highlighted. How we rank explains each one.
| Factor weight | Generac GP9500E Tri Fuel EFI | Honda EB10000 |
|---|---|---|
| Overall rating | 4.2/5 | 3.0/5 |
| Value 30% | 60 $0.15 per running watt | 0 $0.67 per running watt |
| Run time 15% | 65 10.5 hours on a tank at 50% load | 39 7.9 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 EFI | Honda EB10000 | |
|---|---|---|
| Output | ||
| Gasoline | 9,500 W running, 12,500 W starting | 9,000 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, L5-30, L14-30, L14-50 |
| Transfer switch ready | Yes, 240 V | Yes, 240 V |
| Full power at 120 V | No | - |
| Price per watt | $0.15 | $0.67 |
| Fuel and run time | ||
| Fuel | Gasoline, propane, natural gas | Gasoline |
| Tank | 7.5 gal | 8.2 gal |
| Run time (gasoline) | 10.5 hr at 50% load | 7.9 hr at 50% load |
| Run time (propane, 20 lb tank) | 5 hr | - |
| Engine | 500 cc | 688 cc |
| Noise and safety | ||
| Rated noise | - | 71 dBA |
| CO shutoff | Yes | Yes |
| CARB compliant | Yes | No |
| Build | ||
| Starting | Electric and recoil | Electric and recoil |
| Wheels | Yes | Yes |
| Dimensions | 27.2 x 26.94 x 27 in | 41 x 27.7 x 35.1 in |
| Weight | 227 lb | 403 lb |
| Warranty | 3 years | 3 years |
| Released | 2025-03 | 2012-01 |