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 and the Champion 11,500-Watt Dual Fuel are evenly matched, rated 4.2 and 4.2. The Generac GP9500E Tri Fuel EFI leads on fuel options. The Champion 11,500-Watt Dual Fuel wins on value. The Champion 11,500-Watt Dual Fuel costs $240 less ($1,159 vs $1,399).
Champion 11,500-Watt Dual Fuel
#13 in LargeFull review
A large dual-fuel generator for backing up most of a home, central air included, through a transfer switch. Its 14-50R also suits 50 A RV owners.
Amazon $1,159$1,159
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 fuel options (gasoline, propane or natural gas vs gasoline or propane).
- Choose the Champion 11,500-Watt Dual Fuel for value ($0.13 per running watt vs $0.15 per running watt).
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 | Champion 11,500-Watt Dual Fuel |
|---|---|---|
| Overall rating | 4.2/5 | 4.2/5 |
| Value 30% | 60 $0.15 per running watt | 73 $0.13 per running watt |
| Run time 15% | 65 10.5 hours on a tank at 50% load | 60 10 hours on a tank at 50% load |
| Fuel options 15% | 100 gasoline, propane or natural gas | 70 gasoline or propane |
| 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 | Champion 11,500-Watt Dual Fuel | |
|---|---|---|
| Output | ||
| Gasoline | 9,500 W running, 12,500 W starting | 9,200 W running, 11,500 W starting |
| Propane | 8,550 W running, 11,250 W starting | 8,280 W running, 10,350 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, 14-50 |
| Transfer switch ready | Yes, 240 V | Yes, 240 V |
| Full power at 120 V | No | - |
| Price per watt | $0.15 | $0.13 |
| Fuel and run time | ||
| Fuel | Gasoline, propane, natural gas | Gasoline, propane |
| Tank | 7.5 gal | 7.7 gal |
| Run time (gasoline) | 10.5 hr at 50% load | 10 hr at 50% load |
| Run time (propane, 20 lb tank) | 5 hr | 5 hr |
| Engine | 500 cc | 459 cc |
| Noise and safety | ||
| Rated noise | - | 74 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 | 28.9 x 28 x 26.2 in |
| Weight | 227 lb | 209 lb |
| Warranty | 3 years | 3 years |
| Released | 2025-03 | 2025-02 |