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 Westinghouse WGen9500DFc are evenly matched, rated 4.2 and 4.2. The Generac GP9500E Tri Fuel EFI leads on fuel options and run time. The Westinghouse WGen9500DFc wins on value and starting. The Westinghouse WGen9500DFc costs $350 less ($1,049 vs $1,399).
Westinghouse WGen9500DFc
#12 in LargeFull review
A large dual-fuel generator with remote start and a 50 A outlet for home backup through a transfer switch at a low price per watt. Buyers who want longer run time per tank should look at the 9.5 gal WGen10500DFc.
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 GP9500E Tri Fuel EFI for fuel options (gasoline, propane or natural gas vs gasoline or propane) and run time (10.5 hours on a tank at 50% load vs 8 hours on a tank at 50% load).
- Choose the Westinghouse WGen9500DFc for value ($0.11 per running watt vs $0.15 per running watt) and starting (electric start with a remote fob or app vs push-button electric start).
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 | Westinghouse WGen9500DFc |
|---|---|---|
| Overall rating | 4.2/5 | 4.2/5 |
| Value 30% | 60 $0.15 per running watt | 82 $0.11 per running watt |
| Run time 15% | 65 10.5 hours on a tank at 50% load | 40 8 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 | 100 electric start with a remote fob or app |
Specifications
| Generac GP9500E Tri Fuel EFI | Westinghouse WGen9500DFc | |
|---|---|---|
| Output | ||
| Gasoline | 9,500 W running, 12,500 W starting | 9,500 W running, 12,500 W starting |
| Propane | 8,550 W running, 11,250 W starting | 8,500 W running, 11,200 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 | No |
| Total harmonic distortion | - | under 23% |
| Price per watt | $0.15 | $0.11 |
| Fuel and run time | ||
| Fuel | Gasoline, propane, natural gas | Gasoline, propane |
| Tank | 7.5 gal | 6.6 gal |
| Run time (gasoline) | 10.5 hr at 50% load | 8 hr at 50% load |
| Run time (propane, 20 lb tank) | 5 hr | 7 hr |
| Engine | 500 cc | 457 cc |
| Noise and safety | ||
| Rated noise | - | 74 dBA |
| CO shutoff | Yes | Yes |
| CARB compliant | Yes | No |
| Build | ||
| Starting | Electric and recoil | Remote, electric and recoil |
| Wheels | Yes | Yes |
| Dimensions | 27.2 x 26.94 x 27 in | 27.2 x 26.1 x 26.5 in |
| Weight | 227 lb | 212.1 lb |
| Warranty | 3 years | 3 years |
| Released | 2025-03 | 2021-12 |