The Westinghouse WGen10500TFc and the DuroStar DS13000MX are evenly matched, rated 4.4 and 4.4. The Westinghouse WGen10500TFc leads on fuel options and run time. The DuroStar DS13000MX wins on value. The DuroStar DS13000MX costs $350 less ($899 vs $1,249).
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 budget large dual-fuel generator for whole-house backup through a 50 A transfer switch, trading some build quality for a much lower price.
Amazon $899Prices 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 | DuroStar DS13000MX |
|---|---|---|
| Overall rating | 4.4/5 | 4.4/5 |
| Value 30% | 77 $0.12 per running watt | 97 $0.09 per running watt |
| Run time 15% | 55 9.5 hours on a tank at 50% load | 45 8.5 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% | 100 electric start with a remote fob or app | 100 electric start with a remote fob or app |
| Westinghouse WGen10500TFc | DuroStar DS13000MX | |
|---|---|---|
| Output | ||
| Gasoline | 10,500 W running, 13,500 W starting | 10,500 W running, 13,000 W starting |
| Propane | 9,500 W running, 12,500 W starting | 10,000 W running, 12,500 W starting |
| Natural gas | 8,500 W running, 10,000 W starting | - |
| Outlets | 4 × 120 V, L14-30, 14-50, USB | 2 × 120 V, L14-30, 14-50 |
| Transfer switch ready | Yes, 240 V | Yes, 240 V |
| Full power at 120 V | No | - |
| Total harmonic distortion | under 23% | - |
| Price per watt | $0.12 | $0.09 |
| Fuel and run time | ||
| Fuel | Gasoline, propane, natural gas | Gasoline, propane |
| Tank | 9.5 gal | 8.3 gal |
| Run time (gasoline) | 9.5 hr at 50% load | 8.5 hr at 50% load |
| Run time (propane, 20 lb tank) | 7 hr | - |
| Engine | 500 cc | 500 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 | 29.75 x 27.5 x 25.75 in |
| Weight | 230 lb | 209 lb |
| Warranty | 3 years | 3 years |
| Released | 2023-05 | 2024-12 |
