DuroMax XP15000HXT
#17 in LargeFull review
A very large tri-fuel generator for whole-house backup through a 50 A transfer switch, with a big tank for long runs on gasoline between refills.
DuroMax $2,599$2,599
The DuroMax XP15000HXT is the better portable generator overall, rated 4.1 to 3.9. The DuroMax XP15000HXT leads on run time and warranty. The Westinghouse WGen20000TFc wins on value. The DuroMax XP15000HXT costs $1,300 less ($2,599 vs $3,899).
Westinghouse WGen20000TFc
#23 in LargeFull review
A huge tri-fuel generator that can back up a large home in full, wired in by an electrician or through two 50 A outlets. For buyers who want standby-generator output without a permanent install.
Amazon $3,899$3,899
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 DuroMax XP15000HXT for run time (12 hours on a tank at 50% load vs 8 hours on a tank at 50% load) and warranty (5-year warranty vs 3-year warranty).
- Choose the Westinghouse WGen20000TFc for value ($0.19 per running watt vs $0.22 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 | DuroMax XP15000HXT | Westinghouse WGen20000TFc |
|---|---|---|
| Overall rating | 4.1/5 | 3.9/5 |
| Value 30% | 20 $0.22 per running watt | 32 $0.19 per running watt |
| Run time 15% | 80 12 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 | 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% | 100 5-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 |
Specifications
| DuroMax XP15000HXT | Westinghouse WGen20000TFc | |
|---|---|---|
| Output | ||
| Gasoline | 12,000 W running, 15,000 W starting | 20,000 W running, 28,000 W starting |
| Propane | 11,400 W running, 14,250 W starting | 18,000 W running, 25,200 W starting |
| Natural gas | 10,260 W running, 12,825 W starting | 16,000 W running, 22,400 W starting |
| Outlets | 10 × 120 V, L5-30, L14-30, 14-50 | 4 × 120 V, L5-30, L14-30, 14-50 |
| Transfer switch ready | Yes, 240 V | Yes, 240 V |
| Full power at 120 V | - | No |
| Total harmonic distortion | under 5% | under 5% |
| Price per watt | $0.22 | $0.19 |
| Fuel and run time | ||
| Fuel | Gasoline, propane, natural gas | Gasoline, propane, natural gas |
| Tank | 13.2 gal | 17.2 gal |
| Run time (gasoline) | 12 hr at 50% load | 8 hr at 50% load |
| Engine | 670 cc | 999 cc |
| Noise and safety | ||
| Rated noise | 78 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 | 36 x 33.2 x 32 in | 38 x 35 x 40.4 in |
| Weight | 362 lb | 557 lb |
| Warranty | 5 years | 3 years |
| Released | 2023-09 | 2024-06 |