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Generac 12,500W Tri Fuel EFI Review

Name: Generac 12,500W Tri Fuel EFI
Brand: Generac
SKU: B0DT7SCRK9

7.4Good · out of 10Rated from the listing's specs, no buyer reviews yet

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

The Generac 12,500W Tri Fuel EFI packs 8,550 running watts, gasoline, propane and natural gas on one panel and a 50 amp outlet for an inlet box or an RV into one generator. It suits a house with a natural gas line and long outages, and its sibling listing, the Generac 12,500W Tri-Fuel, holds #4 in our dual fuel generators for home backup ranking.

Variants of this model

These are sold as variants of one listing family. Each variant has its own page.

Generac 12,500W Tri-Fuel · 12,500 Starting Watts / 49 State · 7.3/10
Generac 8,250W Dual Fuel · 8,250 Starting Watts - 49 State / 49 State · 7.0/10

Price$1,399Price on Sep 30, 2026 · may have changed

Check the price on Amazon ↗Affiliate link · price and stock on Amazon

Compare side by side ↗

Specifications

Brand	Generac
Category	Dual fuel generators
Running output	8550 W
Listed fuels	gasoline, natural gas, propane
Stated runtime	Up to 14 hours at 25 % load
Fuel tank	7.5 gallons
CO sensor	Stated, with automatic shutoff
Transfer switch ready	Stated in the listing
Outlets named in the listing	50 A (14-50R), L14-30R, GFCI household
Fuel injection (EFI)	Stated in the listing
ASIN	B0DT7SCRK9

Full listing title: Generac 12,500 Watt Tri Fuel Generator with EFI and Electric Start

Listing evidence

Running output	Exact listing

Updated October 2026

Exact listing, ASIN B0DT7SCRK9

Rating method published

Compared with its closest rivals

Two generators that are also open frames, of about the same size, closest to it on our rating, each with a dated price.

Compare side by side ↗

Generac 12,500W Tri Fuel EFI

7.4Good · out of 10$1,399 Price on Sep 30, 2026 · may have changed

Stated: 8,550 W running · Gasoline, Propane, Natural gas
Dual fuel generators

This product ↑

Champion 11,500W Dual Fuel

7.4Good · out of 10$989.99 Price on Sep 30, 2026 · may have changed

Stated: 9,200 W running · 11,500 W peak · Gasoline, Propane
Dual fuel generators

See the review ↗

Pulsar 13,000W Tri Fuel

7.4Good · out of 10See current price ↗

Stated: 10,200 W running · 13,000 W peak · Gasoline, Propane, Natural gas
Dual fuel generators

See the review ↗

8,550 running watts

That's the running figure the listing states, on gasoline. Enough, on paper, for the fridge, the chest freezer and the sump pump at once, with the furnace or the well pump on top once a transfer switch is in. Hold the well pump's start-up surge against the peak before you count on it.

What it has going for it

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 cheapest start. The fridge, the freezer and a lamp plug into the 120 V outlets (GFCI-protected, per the listing); the furnace, the well pump and the water heater stay dark.

A transfer switch: the listing names an L14-30R twist-lock and a 50 amp outlet. 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…

Your house already has a natural gas line
You plan a transfer switch, or you own a 50 amp RV
Kids or pets in the house make CO safety a must

Skip it if…

You'd rather wait for buyer reviews: none are captured for this listing yet
You want quiet power at a campsite: it's an open frame, not an inverter

What Generac promises

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

Rocker-switch electric start eliminates pull-cord effort for routine startups.
Runs up to 14 hours at 25% load or 10.5 hours at 50% load on gasoline.

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.

Outlets, fuel and what's in the box

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

8,550 running watts
Runs on gasoline, propane and natural gas
Outlets named: 50 amp, L14-30R, GFCI 120 V
Electric start
CO sensor that shuts the engine off
7.5 gallon tank, up to 14 h at 25% load

In the box, per the listing: A wheel kit, A starter battery.

The manual for the Generac 12,500W Tri Fuel EFI has the final word on fuel, oil and outlet ratings.

Price and cost per 1,000 running watts

$1,399 Price on Sep 30, 2026 · may have changed

At the price on Sep 30, 2026, each 1,000 running watts works out at about $163.63 (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.

Count the hookup in the budget too: a heavy cord, an inlet box and a transfer switch or interlock, wired by an electrician, are a separate bill.

The button opens the exact listing (ASIN B0DT7SCRK9), where today's price, stock and seller apply. Sizes and variants of the same family often sit at different prices.

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.

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

Only the fridge and a few lights? The Westinghouse 5,000W Dual Fuel Inverter (9.2/10) is a 3,900 W inverter.

Our take

The verdict

The Generac 12,500W Tri Fuel EFI earns its place with 8,550 running watts and gasoline, propane and natural gas on one panel. No buyer reviews yet, so this Generac generator has to win you over on paper. Where it falls short: no word on the propane rating. We'd pick it if your house already has a natural gas line; otherwise, put it next to the Champion 11,500W Dual Fuel first.

Check the price on Amazon ↗Affiliate link · price and stock on AmazonAll dual fuel generators →

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. Fit the wheel kit first; it is easier on the ground.

The first outage

Push the start button, 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 14 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, 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 you order the Generac 12,500W Tri Fuel EFI, check your load list: 8,550 running watts have to cover everything you run at once, motor surges included.

Before you buy

Your load list

Read the label on each appliance (or the manual) for its running watts, and note which ones have a motor. Our running vs starting watts guide explains why the motor ones need the extra surge.

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

Gasoline goes stale in a few months without stabiliser; propane keeps. Check the propane rating in the manual if propane is your plan. Our fuel storage guide covers storage.

How it compares

How the Generac 12,500W Tri Fuel EFI stacks up against the closest alternative, the Champion 11,500W Dual Fuel.

Criterion	Generac 12,500W Tri Fuel EFI	Champion 11,500W Dual Fuel
Our rating	7.4/10	7.4/10
Running watts	8,550 W	9,200 W
Peak watts	Not stated	11,500 W
Fuels	Gas, propane, natural gas	Gas, propane
50 amp outlet	Stated	Not stated

Both score 7.4/10. The Champion 11,500W Dual Fuel adds more running watts (9,200 W) and a higher peak (11,500 W), while the Generac 12,500W Tri Fuel EFI brings natural gas as a third fuel and a 50 amp outlet.

Compare side by side ↗See the Champion 11,500W Dual Fuel review →

The score in detail

How we rated it

Our score: 7.4/10

Key specifications

8 / 10

Build, warranty & certifications

5 / 10

Listing documentation

8 / 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 Generac 12,500W Tri Fuel EFI any good?

We rate it 7.4/10 (good). The rating comes from its documented listing alone, as no customer-review record is captured yet.

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

The listing or manual states 8,550 W running, 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 Generac 12,500W Tri Fuel EFI 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 Generac 12,500W Tri Fuel EFI?

Its listing states 8,550 running watts, gasoline, propane and natural gas on one panel, a 50 amp outlet for an inlet box or an RV, a CO sensor that shuts the engine off, push-button electric start and up to 14 hours on a 7.5-gallon tank at 25 % load. 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 Generac 12,500W Tri Fuel EFI?

Your load list: read the label on each appliance (or the manual) for its running watts, and note which ones have a motor. Our running vs starting watts guide explains why the motor ones need the extra surge. 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: gasoline goes stale in a few months without stabiliser; propane keeps. Check the propane rating in the manual if propane is your plan. Our fuel storage guide covers storage.

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

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 Generac 12,500W Tri Fuel EFI 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.

Dual fuel generators ↗All Generac products Comparison tool All product reviews