Westinghouse WGen20000c review: our full analysis
Brand: Westinghouse · Ranked 82nd of 174 · Our methodology
7.1/10 Power10.0 Runtime7.0 Noise4.7 Features7.7 Portability5.5 Watts per dollar6.6 Dotted line: average of the 174 models. Relative scores based on specs, no hands-on testing. Where to buy Today's best priceTypical price: over $2,500 Check best price Affiliate link: As an Amazon Associate we earn from qualifying purchases.Not clearly published by the manufacturer, take with caution: runtime.
Pros
- 20,000 running watts from a 999 cc V-twin with pressure lubrication and oil filter.
- Two 14-50R and two L14-30R outlets plus an L5-30R.
- 8 hours at 50% load on a 17.2 gal tank; THD under 5%.
Cons
- 541 lb: needs a lift or several people to move.
- Gasoline only.
- No recoil backup start.
Best for
- RVs and travel trailers, through its 14-50R outlet
- Home backup through a transfer switch or an interlock kit
- Running most of a house, well pump included
Specifications
| Type | Gas (open frame) |
|---|---|
| Running watts | 20,000 W gasoline |
| Starting watts | 28,000 W gasoline |
| Fuel | Gasoline |
| Fuel tank | 17.2 gal |
| Runtime | 8 hr at 50% load |
| Noise | 74 dB(A) (manufacturer figure) |
| Weight | 541.1 lb |
| Outlets | 4 × 120 V household outlets (5-20R) · L5-30R 30 A 120 V twist-lock · L14-30R 30 A 120/240 V twist-lock · 14-50R 50 A 120/240 V |
| Transfer switch ready | Yes |
| Start | Remote key fob + electric push-button + recoil |
| CO shutoff sensor | Yes |
| Parallel capable | No |
| Emissions | EPA compliant |
| Engine | 999 cc |
| Warranty | 3 years |
Westinghouse WGen20000c20,000 running W · Gas · typical price over $2,500
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Who is it for?
The Westinghouse WGen20000c is mostly suited to:
- RVs and travel trailers, through its 14-50R outlet.
- Home backup through a transfer switch or an interlock kit.
- Running most of a house, well pump included.
What will a 28,000-watt generator run?
The Westinghouse WGen20000c delivers 20,000 W continuously and up to 28,000 W for a few seconds to start motors. It handles 14 of the 14 loads on our typical list one at a time; add up the running watts of everything you run together, plus the extra starting watts of the biggest motor.
| Appliance | Running / starting watts | Will it run? |
|---|---|---|
| Wi-Fi router and modem | 20 W / 20 W | ✅ Yes |
| CPAP (no humidifier) | 50 W / 50 W | ✅ Yes |
| Laptop or TV | 150 W / 150 W | ✅ Yes |
| Full-size refrigerator | 700 W / 2,200 W | ✅ Yes |
| Chest freezer | 500 W / 1,500 W | ✅ Yes |
| Furnace blower (1/2 HP) | 800 W / 2,350 W | ✅ Yes |
| Sump pump (1/2 HP) | 1,050 W / 2,150 W | ✅ Yes |
| Microwave (1,000 W) | 1,000 W / 1,000 W | ✅ Yes |
| Space heater | 1,500 W / 1,500 W | ✅ Yes |
| Window AC (10,000 BTU) | 1,200 W / 3,600 W | ✅ Yes |
| RV roof AC (13,500 BTU) | 1,800 W / 2,800 W | ✅ Yes |
| Circular saw | 1,400 W / 2,300 W | ✅ Yes |
| Well pump (1 HP, 240 V) | 1,000 W / 4,000 W | ✅ Yes |
| Central AC (3-ton, soft start) | 3,800 W / 5,500 W | ✅ Yes |
Typical figures; check the label of your own appliances. One load at a time: add up everything you run together.
Westinghouse WGen20000c20,000 running W · Gas · typical price over $2,500
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How long does it run on a tank?
The fuel tank holds 17.2 gallons of gasoline. At half load, it runs about 8 hr on a full tank. That is about 2.15 gallon per hour at half load, or 52 gallons for a full day of running, so plan your fuel storage for a multi-day outage.
74 dB(A): how loud is it?
The manufacturer rates the Westinghouse WGen20000c at 74 dB(A), usually measured at 23 feet (7 m) and a light load. That is loud, like a lawn mower: place it as far from the house and the neighbors as the cords allow.
Can you connect it to your house?
Its panel offers 4 × 120 V household outlets (5-20R), L5-30R 30 A 120 V twist-lock, L14-30R 30 A 120/240 V twist-lock, 14-50R 50 A 120/240 V. The 14-50R outlet supplies 120/240 V, which is what a manual transfer switch or an interlock kit with a power inlet box connects to, installed by a licensed electrician. Never backfeed the house through a wall outlet.
Starting, safety and warranty
It starts with a remote key fob or the electric push-button, with a recoil cord as backup. A CO shutoff sensor stops the engine if carbon monoxide builds up around it; it does not replace distance (20 feet from the house) and CO alarms indoors. It is listed as EPA compliant; check California availability if you live there. The warranty runs 3 years (residential use).
Typical price over $2,500: good value per watt?
Relative to its running watts, the Westinghouse WGen20000c scores 6.6/10 on value: an average result. Generator prices on Amazon move a lot, especially before hurricane season: check the current price before you buy.
Westinghouse WGen20000c20,000 running W · Gas · typical price over $2,500
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Our verdict on the Westinghouse WGen20000c
The Westinghouse WGen20000c scores 7.1/10 and ranks 82nd out of 174 generators analyzed. Its strengths: 20,000 running watts from a 999 cc V-twin with pressure lubrication and oil filter; two 14-50R and two L14-30R outlets plus an L5-30R. It is best suited to RVs and travel trailers, through its 14-50R outlet and home backup through a transfer switch or an interlock kit.
Westinghouse WGen20000c20,000 running W · Gas · typical price over $2,500
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Featured in our rankings
Sources
- Official Westinghouse product page (specifications)
- Amazon.com listing (availability and typical price, November 2026)
Frequently asked questions
Will the Westinghouse WGen20000c run a refrigerator?
Yes: its 20,000 running watts and 28,000 starting watts cover a full-size fridge, including the compressor's startup surge.
Can the Westinghouse WGen20000c power a house?
It can back up the essentials through a transfer switch or interlock kit connected to its 14-50R outlet. With this power, that includes most of a typical house.
How long does the Westinghouse WGen20000c run on a tank?
About 8 hr at half load according to the manufacturer.
Does the Westinghouse WGen20000c run on propane?
No, it runs on gasoline only.
Is the Westinghouse WGen20000c quiet?
The manufacturer rates it at 74 dB(A), typical of an open-frame generator: not campground-quiet.
Westinghouse WGen20000c20,000 running W · Gas · typical price over $2,500
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Westinghouse WGen20000c7.1/10 · over $2,500
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