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Westinghouse 12,500W EFI Tri-Fuel

Product images: Amazon listings

Westinghouse 12,500W EFI Tri-Fuel Review

7.9Very good · out of 10#5 of 5 in our 10,000 Watt Generators ranking

Written from the listing's specs, not from our own use · How we rate

On paper, the Westinghouse 12,500W EFI Tri-Fuel gets the important things right: 9,500 running watts (12,500 at start-up), tri-fuel flexibility (gas, propane or natural gas) and a 50 amp outlet. It earned a spot in our top five 10,000 watt generators, and it's built for whole-house backup on three fuels.

Price$1,449Price on Sep 30, 2026 · may have changed
Check the price on Amazon ↗ Westinghouse 12,500W EFI Tri-Fuel (opens in a new tab)Affiliate link · price and stock on Amazon
Compare side by side ↗
Specifications
BrandWestinghouse
CategoryDual fuel generators
Running output9500 W
Peak output12500 W
Listed fuelsgasoline, natural gas, propane
Propane running watts8,500 W, per the listing
Stated runtimeUp to 15 hours
Fuel tank6.6 gallons
CO sensorStated in the listing
Transfer switch readyStated in the listing
Outlets named in the listing50 A (14-50R), L14-30R, GFCI household
Fuel injection (EFI)Stated in the listing
Engine457 cc
Stated warranty3 years
CARB compliantStated in the listing
ASINB0F5YZRMF3

Full listing title: Westinghouse 12500 Peak Watt EFI Tri-Fuel Home Backup Portable Generator, Remote Electric Start, Transfer Switch Ready, Gas, Propane, and Natural Gas Powered, CARB Compliant

Listing evidence
Running output Exact listing
Peak output Exact listing
Updated October 2026
Exact listing, ASIN B0F5YZRMF3
Rating method published

Compared with its closest rivals

The two picks next to it in our 10,000 watt generators ranking, with their rating and a dated price.

Compare side by side ↗

Westinghouse 12,500W EFI Tri-Fuel

Westinghouse 12,500W EFI Tri-Fuel

7.9Very good · out of 10$1,449 Price on Sep 30, 2026 · may have changed
  • Stated: 9,500 W running · 12,500 W peak · Gasoline, Propane, Natural gas
  • Dual fuel generators
This product ↑
Westinghouse 12,500W EFI Dual Fuel

Westinghouse 12,500W EFI Dual Fuel

7.9Very good · out of 10$1,399 Price on Sep 30, 2026 · may have changed
  • Stated: 9,500 W running · 12,500 W peak · Gasoline, Propane
  • Dual fuel generators
See the review ↗
Westinghouse 12,500W Dual Fuel CO Sensor

Westinghouse 12,500W Dual Fuel CO Sensor

7.9Very good · out of 10$1,049 Price on Sep 30, 2026 · may have changed
  • Stated: 9,500 W running · 12,500 W peak · Gasoline, Propane
  • Dual fuel generators
See the review ↗

9,500 running watts, 12,500 at start-up

That's the running figure the listing states, on gasoline; on propane it drops to 8,500. Add up what has to run at once (fridge, freezer, sump pump, furnace blower) and the Westinghouse 12,500W EFI Tri-Fuel should have room to spare on paper; the motor that starts last, often the well pump, is the one to plan around.

Why it made our list

What changes on the night the power goes out

Three fuels. Natural gas from the house line means no refuelling at 2 a.m., and it is also the lowest-output fuel of the three. The hookup is a job for a licensed gas fitter, not a hose and a guess.

50 amp outlet. The big plug that feeds a 50 amp inlet box, a transfer switch or a 50 amp RV. One cord carries both legs of 240 V, which is how the well pump and the furnace get power without extension cords through a window.

Extension cords or a transfer switch?

Extension cords: the fridge, the freezer and a lamp or two plug straight into the 120 V outlets on the frame (GFCI-protected, per the listing). It costs little, but the furnace, the well pump and anything hard-wired stay off.

A transfer switch: the listing names an L14-30R twist-lock and a 50 amp outlet, and the seller calls it transfer-switch ready. That's the plug an inlet box takes. Once an electrician has wired the inlet and a transfer switch or interlock, the furnace and the well pump can run off it too; count that bill on top.

Great for you if…

  • You want most of the house running, not just the fridge
  • Your house already has a natural gas line
  • You plan a transfer switch, or you own a 50 amp RV

Skip it if…

  • You need quiet power for a campsite: this is a big open frame
  • You simply want our top pick: that's the DuroMax XP12000EH (9.3/10)
  • You'd rather wait for buyer reviews: none are captured for this listing yet

What Westinghouse promises

The seller states, word for word, in the Westinghouse 12,500W EFI Tri-Fuel listing:

  • 12,500 peak watts, 9,500 running watts (gasoline).
  • Features one 120/240V 14–50R 50A outlet for home or RV and one 120/240V L14-30R 30A twist lock.
  • Equipped with 457cc Westinghouse 4-stroke OHV engine with durable cast iron sleeve.
  • Electronic fuel injection delivers higher power and torque, reduces fuel use and emissions, increases engine reliability, and needs less maintenance.

The seller's claims, quoted as written; we haven't measured any of it. The noise on your driveway and the surge of your well pump are things you only find out at home.

Westinghouse 12,500W EFI Tri-Fuel, view 3

Outlets, fuel and what's in the box

What the Westinghouse 12,500W EFI Tri-Fuel listing names:

  • 9,500 running watts, 12,500 peak
  • Runs on gasoline, propane and natural gas
  • 8,500 running watts on propane
  • Outlets named: 50 amp, L14-30R, GFCI 120 V
  • Sold as transfer-switch ready
  • Remote and electric start
  • CO sensor
  • 6.6 gallon tank, up to 15 h
  • 457 cc engine with fuel injection
  • CARB compliant

Warranty & support: A 3-year warranty, as stated in the listing · CARB compliance stated (all 50 states).

That is the maker's promise, not ours. Keep the order confirmation, and register the Westinghouse 12,500W EFI Tri-Fuel if the maker asks you to.

Read the manual for the fuel, the oil grade and what each outlet is rated for before the first start.

Westinghouse 12,500W EFI Tri-Fuel, view 4

Price and cost per 1,000 running watts

$1,449 Price on Sep 30, 2026 · may have changed

At the price on Sep 30, 2026, each 1,000 running watts works out at about $152.53 (price ÷ stated running watts, our arithmetic). That puts it around the middle of the 37 generators above 8,000 running watts we have a price and a stated running figure for.

Add the hookup to the budget: a heavy cord, an inlet box and an electrician's visit for the transfer switch or interlock.

The button opens the exact listing (ASIN B0F5YZRMF3), where today's price, stock and seller apply.

Westinghouse 12,500W EFI Tri-Fuel, view 5

A better fit for your load list?

Want it quieter, or cleaner power for electronics? The Champion 11,000W Dual Fuel Inverter (7.8/10) is an inverter, per its listing.

Want a CO shutoff? The WEN 14,500W Tri-Fuel, CO Watchdog (7.8/10) names a CO sensor that shuts the engine off.

Well pump or central air on the list? The Champion 16,875W Tri Fuel (7.8/10) is rated 13,500 running watts.

Our take

The verdict

Our favourite thing about the Westinghouse 12,500W EFI Tri-Fuel is 9,500 running watts (12,500 at start-up), closely followed by tri-fuel flexibility (gas, propane or natural gas). No buyer reviews yet, so the Westinghouse 12,500W EFI Tri-Fuel has to win you over on paper. Honestly, the catch: the DuroMax XP12000EH sitting above it at 9.3/10. We'd pick it if you want most of the house running, not just the fridge; otherwise, put it next to the Westinghouse 12,500W EFI Dual Fuel first.

Check the price on Amazon ↗ Westinghouse 12,500W EFI Tri-Fuel (opens in a new tab)Affiliate link · price and stock on AmazonSee the 10,000 watt generators ranking →

Living with it

Delivery day

Fill it with oil before the first start, then run it for a few minutes outside with a small load.

The first outage

Start it with the fob, let it warm up, then add loads one at a time, the biggest motor first. Propane or gas: decide before the storm and have the hose and the tank ready. The 15 hours on the listing are at a light load; plan a refill at night.

Between storms

Run it every month or so for 20 minutes and keep the battery charged. On propane you avoid stale gas in the carburetor; on gas, add stabiliser or run it dry before storage. Our maintenance schedule has the full list.

Upkeep

First oil change after the break-in hours in the manual (the hour meter counts them), then on schedule. Air filter and spark plug once a season, and a cover for the months it sits.

The one thing we'd check first

Before the Westinghouse 12,500W EFI Tri-Fuel goes in your cart, check the propane rating: it is rated 8,500 running watts on propane against 9,500 on gas, so size your list for the fuel you will actually use.

Before you buy

Your load list

9,500 running watts and 12,500 at start-up, per the listing. Write down what has to run at the same time, add the biggest motor surge (well pump, sump pump, AC), and let our sizing calculator do the sums.

How it reaches the house

It has a 50 amp outlet, which still needs an inlet box and a transfer switch or interlock installed by an electrician. Our transfer switch guide explains the options.

Where it will run

Outside only, about 20 ft from doors, windows and vents, exhaust pointing away (the CO sensor is a backup, not a permission). Pick the spot now, before the storm. Our CO safety and placement guide has the details.

Fuel for three days

A 20 lb tank lasts far less than a day at half load on most big units; two or three full tanks make a realistic plan. Our fuel storage guide covers storing them safely.

How it compares

How the Westinghouse 12,500W EFI Tri-Fuel stacks up against the closest alternative in our ranking, the Westinghouse 12,500W EFI Dual Fuel.

CriterionWestinghouse 12,500W EFI Tri-FuelWestinghouse 12,500W EFI Dual Fuel
Our rating7.9/107.9/10
Running watts9,500 W9,500 W
Peak watts12,500 W12,500 W
FuelsGas, propane, natural gasGas, propane

Both score 7.9/10. The Westinghouse 12,500W EFI Tri-Fuel brings natural gas as a third fuel, so it has the edge on paper.

Compare side by side ↗See the Westinghouse 12,500W EFI Dual Fuel review →
The score in detail

How we rated it

Our score: 7.9/10

Key specifications

9 / 10

Build, warranty & certifications

8 / 10

Listing documentation

9 / 10

Fit & compatibility

8 / 10

This product has no captured buyer-review record yet, so its rating comes from the documented listing alone: four criteria scored out of 10 (key specifications; build, warranty and certifications; listing documentation; fit and compatibility), placed on a 4.5–8.5 scale. Read the full methodology.

Read the methodology →

Frequently asked questions

Is the Westinghouse 12,500W EFI Tri-Fuel any good?

We rate it 7.9/10 (very good), #5 of 5 in our 10,000 watt generator ranking. The rating comes from its documented listing alone, as no customer-review record is captured yet.

How many watts does the Westinghouse 12,500W EFI Tri-Fuel deliver?

The listing or manual states 9,500 W running and 12,500 W peak, usually for gasoline. Size your load list against the running watts and keep the peak for motor starts; propane and natural gas ratings are lower. These are the seller's figures, not our measurements (our sizing calculator turns your loads into a running and peak pair).

Which fuels does the Westinghouse 12,500W EFI Tri-Fuel run on?

The listing names gasoline, propane and natural gas. Output differs by fuel, so check the per-fuel running watts in the manual and whether the hoses you need come in the box. Run it outdoors only, away from doors, windows and vents.

What do you get with the Westinghouse 12,500W EFI Tri-Fuel?

Its listing states 9,500 running watts (12,500 at start-up), gasoline, propane and natural gas on one panel, a 50 amp outlet for an inlet box or an RV, a built-in CO sensor, remote start from a key fob and up to 15 hours on a 6.6-gallon tank. These are the seller's figures, not our measurements: how loud it is in your driveway and how it handles your well pump's surge can't be read from a listing.

What should I check before ordering the Westinghouse 12,500W EFI Tri-Fuel?

Your load list: 9,500 running watts and 12,500 at start-up, per the listing. Write down what has to run at the same time, add the biggest motor surge (well pump, sump pump, AC), and let our sizing calculator do the sums. How it reaches the house: it has a 50 amp outlet, which still needs an inlet box and a transfer switch or interlock installed by an electrician. Our transfer switch guide explains the options. Where it will run: outside only, about 20 ft from doors, windows and vents, exhaust pointing away (the CO sensor is a backup, not a permission). Pick the spot now, before the storm. Our CO safety and placement guide has the details. Fuel for three days: a 20 lb tank lasts far less than a day at half load on most big units; two or three full tanks make a realistic plan. Our fuel storage guide covers storing them safely.

Where can I buy the Westinghouse 12,500W EFI Tri-Fuel?

We link to the exact listing on Amazon, where today's price, stock and seller apply. It is an affiliate link, and it has no effect on the rating.

Have you used the Westinghouse 12,500W EFI Tri-Fuel yourselves?

No, we haven't used it ourselves. Everything on this page comes from its listing, read line by line and weighed with our published formula, plus our editors' read of how it compares with its rivals.

Keep comparing

If the Westinghouse 12,500W EFI Tri-Fuel hasn't sold you yet, see where it ranks or browse all dual fuel generators.

Where it ranks

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