Westinghouse WGen11500TFc Tri-Fuel

Name: Westinghouse WGen11500TFc Tri-Fuel
Brand: Westinghouse
Price: 1699 USD
Availability: InStock

~$1,699approx. list price

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800 WLights, phones, router, a CPAP
2,200 WFridge, freezer and the essentials
4,000 WFurnace blower, sump pump or a window AC
7,500 WWell pump or a small central AC
18,000 WWhole home with central air

11,500 W running, 14,500 W surge — sustains the well pump or a small central AC tier and everything below it.

Best forStorm-prone homeowners who want unlimited-runtime whole-house backup without a standby install.

The power-user pick: hook it to your home's natural gas line through a quick-connect and you have effectively unlimited runtime without storing a drop of gasoline — the practical middle ground between a portable and a $12,000 standby install. On gasoline it makes a huge 11,500 running watts; the honest math is the NG derate to 9,500 running watts, still enough for most whole homes via the 50A outlet and an interlock. Remote start, CO sensor, and a 9.5-gallon tank round it out. Owner notes: NG performance depends on an adequately sized gas supply, and some units sputter or won't start on NG even where a twin runs fine. It's also a 230-lb beast and mid-70s dB loud, and Westinghouse's shift toward mail-in warranty service worries owners of a machine this heavy.

From the spec sheet

Specifications

Running watts: 11,500 W
Starting watts: 14,500 W
Fuel tank: 9.5 gal
Runtime: 19 hrs @ 25% load (9.5 gal gas); ~7 hrs @ 50% on 20-lb propane; unlimited on NG hookup

Type: Portable Generator
Fuel: Tri Fuel (Gas/LP/NG)
Noise: 74 dB
Outlets: 2x 120V 20A duplex (5-20R), 1x 120/240V 30A (L14-30R), 1x 120/240V 50A (14-50R), 2x USB
Transfer-switch ready: Yes
Weight: 230 lbs
Warranty: 3-year limited
Model: WGen11500TFc

Runs on your home's NG line·11,500W gas / 9,500W NG·50A transfer-switch ready

At a glance

Strengths

+Natural-gas hookup eliminates fuel storage and refueling runs
+Massive output covers whole homes including central AC
+Remote start plus push-button electric start
+50A and 30A 240V outlets for any interlock/transfer setup
+19-hour gasoline runtime when NG isn't available
+CO sensor shutdown for safer semi-sheltered running

At a glance

Drawbacks

−NG output drops to 9,500 running watts
−Needs an adequately sized NG supply, and some units sputter or won't start on NG
−230 lbs is genuinely hard to maneuver
−Loud mid-70s dB under load
−Support and parts turnaround can be slow

Summarised from owner discussions and forums

Owner insights

The WGen11500TFc is the tri-fuel portable one Houston buyer spent three weeks hunting for after the 2024 hurricane, and owners' setups since follow a pattern: a 50A inlet and interlock, a quick-connect gas line from the meter, and a generator that runs central AC, fridges and the rest of the house. What sets it apart in owner discussions is the low-THD claim, which two of three owner readings back up, at 2.5-2.7 percent at light load and 6.9 percent with a 4-ton AC running, plus a natural gas appetite measured at about 138 cubic feet per hour near full load by one owner, under Westinghouse's own figure of about 162.

Living with it turns on fuel supply and early-life defects. A 20-lb propane tank froze and starved a unit, which led its owner to tanks in parallel or a larger tank, while on NG another measured his consumption on the supplied half-inch hose fed from a 3/4-inch quick connect, and another runs 1-inch and 3/4-inch fittings from the meter. Out-of-box failures are the recurring worry: a unit that shut down after five seconds until its owner disturbed the CO sensor, an engine that locked up on its first start, an oil leak from the casting, a unit that died on its second outing, and individual units that will not start or sputter on NG while a twin on the same line runs fine. For one unit that would not start, the first question asked was about the oil fill, and an owner swapped the factory Torch plug for an NGK and says it now starts on the first try. Westinghouse refunded one leaking unit without asking for it back, but one owner of a sibling model says it is moving to mail-in warranty service.

Whole-house capacity and a low-THD rating, on natural gas service, are what lead homeowners here. One comparison with the DuroMax XP13000HXT gave the Westinghouse roughly 1,000 more watts, the lower THD rating and a $500 lower price, conceding DuroMax the better support. On propane, one shopper weighing Champion's 9000W tri-fuel inverter noted its 6,525 running watts against the Westinghouse's 10,500, and the larger WGen14500TFc is the step up shoppers weigh it against.

What owners like

+Two owners' meters back the low-THD claim at light load: one read 2.5-2.7 percent at about 150 watts, and the other read under 5 percent, rising to 6.9 percent with his 4-ton AC running, against 23 percent from his Firman 7500 on the same items
+On natural gas an owner runs two 4-ton ACs on Micro-Air soft starts, and another runs a 5-ton AC alongside four fridges and freezers, septic and computers
+Westinghouse's engineers put natural gas use at about 162 cubic feet per hour at full load, well below the 225,000 BTU DuroMax claims for its 13kW tri-fuel, and an owner timing his meter measured about 138 cubic feet per hour at 97 percent load
+It has an oil pump and a washable screen oil filter: one comparison listed them among its advantages over the DuroMax, an owner glad of the screen found metal dust on his magnetic dipstick after break-in, and another posted a reminder to clean the mesh
+An owner keeps it in standby with the battery switch on and the selector on NG, starting it from the fob and moving the interlock within about 5 minutes of an outage, and another's starts on NG at every first-Saturday exercise run
+Street price has run from the $1,499 list in September 2024, when one buyer watched Home Depot's online stock drop from 29 to 17 during checkout, down to $1,444 on Amazon that November and $1,387 in February 2025
+Timed at the meter, one owner's natural gas cost, at 77 cents per CCF, ran from 38 cents an hour at idle to about a dollar an hour from 78 percent load up
+With the windows closed, an owner can barely hear it inside the house, even while it runs AC, microwave and an electric kettle

Common complaints

−Twenty-pound propane tanks cannot vaporize fast enough for it; a unit starved and died under load with the tank bottom ice cold on a 100-degree day
−Brand-new units have arrived dead: one shut down after about five seconds on every fuel until its owner disturbed the CO sensor, one ran five seconds on its first start and then locked up, and one died on its second use with 30 psi compression
−One new unit leaked oil from the engine casting on its first run, which others split between a crack and a Welch plug, and Westinghouse refunded it without asking for the generator back
−Natural gas starting is not universal: an owner has gone more than a year unable to get his to start on NG, and one with two identical units found the REV 02 sputtering on the same gas line the other ran smoothly on
−The paperwork in the box lists THD under 23 percent while marketing says under 5 percent, and an owner testing on NG with a soft-started 4-ton AC was not impressed with his reading
−An iGen8200TFc owner said Westinghouse is sunsetting its authorized generator service centers in favor of mail-in warranty, which is a real concern on a 230-lb machine
−Supply was a headache in 2024: one buyer refreshed retailer sites for three weeks after the Houston hurricane, and when Home Depot restocked in September, 12 of 29 units went during another buyer's checkout

Questions owners ask

Does the WGen11500TFc really deliver under 5 percent THD?

At light load, by two owners' meters: one read 2.5-2.7 percent at about 150 watts, and another read under 5 percent, rising to 6.9 percent with a 4-ton AC running, and noticed the fan hum and LED flicker he got from his Firman were gone. The one-page sheet in the box still says under 23 percent, and a third owner on NG with a soft-started 4-ton AC was not impressed by his reading at load.

Will a 20-lb propane tank run it?

Not under real load. A unit would not start, or died as load was added, on a 20-lb tank whose bottom was ice cold at 100 degrees outside, and another's starved during break-in. The first owner concluded after research that it needs tanks in parallel or a 100-lb or larger tank, since vaporization depends on tank size and ambient temperature, and one person said tank warmers partially help with smaller tanks.

What gas supply does it need on natural gas?

Westinghouse's figure is about 162 cubic feet per hour at full load and roughly 6 inches of water column, and an owner timing his meter measured about 138 cubic feet per hour at 97 percent load on the supplied 25-foot half-inch hose fed from a 3/4-inch quick connect at the meter. Another owner runs a 15-foot 3/4-inch hose from 1-inch and 3/4-inch fittings at the meter, stepping down to the half-inch quick connect the generator takes.

My brand-new unit cranks and dies after a few seconds on every fuel. What is wrong?

The first question is the oil level, since it has a low-oil shutoff. In one case the owner found it ran once he disturbed the CO sensor, though it still needed the sensor placed just so, and he planned to have it replaced; other owners got theirs running by disconnecting the oil sensor wire. A pull cord that will not move at all is a different problem: the suggestion was pulling the spark plug to rule out hydro-lock, and another owner with the same locked-up symptom found a broken rod, and Westinghouse sent a new generator.

Should I buy this or the DuroMax XP13000HXT?

One comparison listing the differences gave the Westinghouse about 1,000 more watts, a lower THD rating, an oil pump with a screen filter, a lower natural gas draw and a price about $500 lower, leaving DuroMax only its customer service. A DuroMax owner rated that support 7 out of 10, and another owner found the Westinghouse's build quality more impressive than the XP13000HXT's.

How much does it cost to run on natural gas?

An owner timed his meter at several loads and, at 77 cents per CCF, worked out 38 cents an hour at idle, about 63 cents at a quarter load, 79 cents at half and about a dollar from 78 percent up. Running with nothing plugged in still burns gas, and one estimate put the extra cost of an outage day at around 10 to 12 dollars.

Head to head

Compare the Westinghouse WGen11500TFc Tri-Fuel

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