The Westinghouse WGen10500TFc is the better portable generator overall, rated 4.4 to 4.3. The Westinghouse WGen10500TFc costs $250 less ($1,249 vs $1,499).
A large tri-fuel generator that can run most of a house through a transfer switch on gasoline, propane or a natural gas line. Best for homeowners with a gas line who want long outages covered without refueling.
Amazon $1,249A large tri-fuel generator with cleaner-than-usual power for whole-home backup through a 50 A transfer switch. Best for homeowners with a natural gas line who want to run electronics safely.
Amazon $1,499Prices 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.
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 | Westinghouse WGen10500TFc | Westinghouse WGen11500TFc |
|---|---|---|
| Overall rating | 4.4/5 | 4.3/5 |
| Value 30% | 77 $0.12 per running watt | 70 $0.13 per running watt |
| Run time 15% | 55 9.5 hours on a tank at 50% load | 55 9.5 hours on a tank at 50% load |
| Fuel options 15% | 100 gasoline, propane or natural gas | 100 gasoline, propane or natural gas |
| 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% | 100 electric start with a remote fob or app | 100 electric start with a remote fob or app |
| Westinghouse WGen10500TFc | Westinghouse WGen11500TFc | |
|---|---|---|
| Output | ||
| Gasoline | 10,500 W running, 13,500 W starting | 11,500 W running, 14,500 W starting |
| Propane | 9,500 W running, 12,500 W starting | 10,500 W running, 13,500 W starting |
| Natural gas | 8,500 W running, 10,000 W starting | 9,500 W running, 12,000 W starting |
| Outlets | 4 × 120 V, L14-30, 14-50, USB | 4 × 120 V, L14-30, 14-50, USB |
| Transfer switch ready | Yes, 240 V | Yes, 240 V |
| Full power at 120 V | No | No |
| Total harmonic distortion | under 23% | under 5% |
| Price per watt | $0.12 | $0.13 |
| Fuel and run time | ||
| Fuel | Gasoline, propane, natural gas | Gasoline, propane, natural gas |
| Tank | 9.5 gal | 9.5 gal |
| Run time (gasoline) | 9.5 hr at 50% load | 9.5 hr at 50% load |
| Run time (propane, 20 lb tank) | 7 hr | 7 hr |
| Engine | 500 cc | 550 cc |
| Noise and safety | ||
| Rated noise | 74 dBA | 74 dBA |
| CO shutoff | Yes | Yes |
| CARB compliant | No | No |
| Build | ||
| Starting | Remote, electric and recoil | Remote, electric and recoil |
| Wheels | Yes | Yes |
| Dimensions | 27.2 x 26.1 x 26.5 in | 27.2 x 26.1 x 26.5 in |
| Weight | 230 lb | 230 lb |
| Warranty | 3 years | 3 years |
| Released | 2023-05 | 2023-11 |
