Quick verdict
The Westinghouse 14500 Peak Watt Tri-Fuel is my top large portable pick. It runs on gas, propane or natural gas, delivers 11,500 running watts on gas from a 550cc engine, and adds remote start, low THD output and up to 19 hours of runtime, which makes it a capable, flexible backup for a larger home.
Westinghouse 14500 Peak Watt Tri-Fuel Portable Generator
The Westinghouse 14500 leads because it offers the most versatile high-output backup here, running on gas, propane or natural gas and producing 11,500 running watts on gas from a durable 550cc engine. Westinghouse lists up to 19 hours on its 9.5-gallon tank, low THD output that is safe for electronics, and remote electric start with a key fob. It is explicitly built as backup for a larger home or a dependable jobsite unit, which fits the large-portable brief.
The best large portable generator for whole-home backup and jobsites. Compared five high-output units by running watts, fuel, outlets and starting features.
Why you should trust this guide
A large portable generator is the middle ground between a small camping unit and a permanently installed standby: it produces enough power to back up much or all of a home, yet it rolls out to a jobsite and stores in a garage. That capability comes from big engines and high wattage, so the numbers that matter are the running watts on your chosen fuel and whether the outlet set can tie into a home transfer switch. Peak watts make the headline, but running watts are what you can actually sustain.
I have not operated these specific generators, and I will not claim to. What this guide does is compare the published specifications, the running watts across fuels, the engine displacement, the outlet layout, the runtime and the starting method, and translate them into which unit fits which home. Because these are high-output fuel machines, I also flag the realities a spec sheet skips, like outdoor-only operation and the licensed electrician needed to wire in a transfer switch.
How we evaluated
Running watts came first, since a large portable earns its size by how much of a home it can carry. These units span roughly 9,500 to 20,000 running watts on gasoline, so I sorted them by that figure and by how far output drops on propane or natural gas, then checked whether the surge rating could start heavy motor loads like a well pump or central air. I matched those numbers to essential-circuit versus whole-home backup needs.
From there I weighed the features that make a big generator livable in an emergency. Electric or remote start is far easier than recoil on a large engine, tri-fuel flexibility adds natural gas for extended runtime, and transfer-switch-ready 240V outlets are essential for feeding a panel. I also gave weight to runtime per tank, carbon monoxide shutdown sensors and the wheels and handles that decide whether one or two people can actually move the unit.
What to look for
- Running watts on your chosen fuel, which is what you can sustain and matters more than the peak figure.
- Surge or peak watts, needed to start heavy motor loads like a well pump or central air conditioner.
- Fuel type, from dual-fuel gas and propane to tri-fuel that adds natural gas for extended runtime.
- Transfer-switch-ready 240V outlets, or a hardwire terminal block, for feeding a home electrical panel.
- Starting method, with electric or remote start far easier than recoil on a large engine.
- Runtime per tank and tank size, which decide how often you refuel during a long outage.
- Wheels, handles and weight, since these units are heavy and must still be movable outdoors.
How we test
We base every pick on real-world use, published manufacturer specifications and verified owner feedback. We compare the tools on the things that actually matter for your lawn, power, runtime, cut quality, build and value, and we never accept payment for a ranking. When we have not used a specific model first-hand, we say so.
The picks at a glance
| Tool | Best for | Score | |
|---|---|---|---|
| Westinghouse 14500 Peak Watt Tri-Fuel Portable Generator | Best Overall | Check price | |
| Westinghouse 18000 Peak Watt Tri-Fuel Portable Generator | Best Value | Check price | |
| Westinghouse 28000 Peak Watt Tri-Fuel Portable Generator | Best Premium | Check price | |
| Westinghouse 12500 Watt Dual Fuel Home Backup Portable Generator | Best Budget | Check price | |
| DuroStar DS13000MX Dual Fuel Portable Generator | Also Great | Check price |
The picks, reviewed
Westinghouse 14500 Peak Watt Tri-Fuel Portable Generator
The Westinghouse 14500 leads because it offers the most versatile high-output backup here, running on gas, propane or natural gas and producing 11,500 running watts on gas from a durable 550cc engine. Westinghouse lists up to 19 hours on its 9.5-gallon tank, low THD output that is safe for electronics, and remote electric start with a key fob. It is explicitly built as backup for a larger home or a dependable jobsite unit, which fits the large-portable brief.
Reasons to buy
- Perfect as a backup power source for larger homes or a dependable source of portable power
- 14,500 peak watts, 11,500 running watts (gasoline); 13,500 peak watts, 10,500 running watt
- Powered by a heavy duty 550cc 4-Stroke OHV Westinghouse Engine constructed with a durable
- Engineered with low THD, so it's safe for sensitive electronics. Power phones, computers,
- All Westinghouse portable generators are functionally tested in the factory and may contai
Reasons to avoid
- Output falls on propane and natural gas, so plan capacity around your chosen fuel
- It is a heavy open-frame unit that must run outdoors
Westinghouse 18000 Peak Watt Tri-Fuel Portable Generator
The Westinghouse 18000 is the value step-up because it jumps to 14,500 running watts on gas from a 713cc V-Twin engine while keeping tri-fuel flexibility. It runs up to 16 hours at 25 percent load on a 10.5-gallon tank, offers a full outlet set including a 50A 14-50R and an L14-30R, and adds remote start and a CO sensor. It suits buyers backing up a larger home who want more headroom than the 14500.
Reasons to buy
- HUGE PORTABLE POWER: The WGen14500TFc tri fuel generator with CO sensor is an ideal power
- TRI FUEL WESTINGHOUSE WORKHORSE: Runs up to 16 hours at 25% load on a 10.5 gallon gas tank
- LOW THD—SAFE FOR SENSITIVE ELECTRONICS: At less than 5% THD, you can power phones, compute
- PLUG IN, POWER UP: Engineered to backup larger homes with ease. One 120/240V 14-50R 50A ou
- FULL OF FEATURES: Push button and remote start for quick and easy use; Includes a CO shutd
Reasons to avoid
- Running that much power draws a tank down quickly at higher loads
- It is large and heavy even with wheels and a lift bar
Westinghouse 28000 Peak Watt Tri-Fuel Portable Generator
The Westinghouse 28000 is the premium powerhouse, delivering 20,000 running watts on gas from a 999cc V-Twin engine, enough to approach true whole-home backup. It carries two 50A outlets, two L14-30R outlets and a rare 125A 240V terminal block that lets an electrician hardwire it to the home for full output without cord limits. It is for buyers who want the capability of a standby unit in a portable, tri-fuel form.
Reasons to buy
- HUGE PORTABLE POWER: Gasoline: 28,000 peak watts and 20,000 running watts; Propane: 25,200
- TRI FUEL WESTINGHOUSE WORKHORSE: Powered by a heavy-duty 999 cc Westinghouse V-Twin OHV en
- PLUG IN, POWER UP: Two 120/240V 14-50R 50A outlets, two 120/240V L14-30R 30A outlets, all
- LOW THD—SAFE FOR SENSITIVE ELECTRONICS: Engineered so you can power phones, computers, TVs
- MAX POWER OPTION: With high output designed for easy whole-home backup, our exclusive 125A
Reasons to avoid
- At this size it is barely portable and needs its wheels and lift bar to move
- The hardwire terminal block requires a licensed electrician to use
Westinghouse 12500 Watt Dual Fuel Home Backup Portable Generator
The Westinghouse 12500 is the budget entry into large portables, with 9,500 running and 12,500 peak watts on gas from a 457cc engine, plus dual-fuel propane operation. It is transfer-switch ready with an L14-30R and a 50A RV outlet, includes remote electric start with a key fob, and shows voltage, frequency and lifetime hours on a display. It is a sensible choice for essential whole-home backup without the top-tier price.
Reasons to buy
- 9500 Running Watts and 12500 Peak Watts (Gasoline); 8500 Running Watts, 11200 Peak Watts (
- Features Two GFCI 120V 5–20R 20A Standard Household Receptacle, One Transfer Switch Ready
- Powered by a Heavy Duty 457cc Westinghouse 4-Stroke OHV Engine Featuring a Long-Lasting Ca
- Plug-and-Play: Comes with a Remote Start Key Fob, 12V Battery Charger, Oil, an Oil Funnel,
- All Westinghouse Portable Generators are Functionally Tested in the Factory and May Contai
Reasons to avoid
- It is dual-fuel only, with no natural gas option like the tri-fuel units
- At 12,500 peak watts it covers essentials rather than a very large home
DuroStar DS13000MX Dual Fuel Portable Generator
The DuroStar DS13000MX is a strong also-great, a dual-fuel unit delivering 13,000 watts from a 500cc engine with a push-button electric start and a front-facing fuel selector. It is transfer-switch ready with a 50A outlet, adds CO Alert carbon monoxide shutdown, and uses a rugged all-metal frame built for storms and heavy use. It suits buyers who want high dual-fuel output and an easy transfer-switch hookup.
Reasons to buy
- 13,000 Watts of Reliable Power for Home Power Backup – Keep your home, job site, or RV pow
- Dual Fuel Technology – Gasoline or Propane – Choose between gasoline for maximum power or
- CO Alert for Enhanced Safety – Advanced carbon monoxide detection automatically shuts down
- Push-Button Electric Start & Intuitive Control Panel – Easily start your generator with th
- Transfer Switch-Ready with 50-Amp Outlet – Power your entire home by connecting directly t
Reasons to avoid
- It lacks the natural gas option of the Westinghouse tri-fuel models
- As a high-output open-frame unit it is heavy and must run outdoors
What to look for
Running watts
Running watts on your chosen fuel are what you can sustain, so size to that rather than the higher peak figure.
Surge headroom
Peak watts must cover the startup spike of heavy loads like a well pump or central air conditioner.
Fuel flexibility
Dual-fuel adds propane, and tri-fuel adds natural gas for extended runtime during a long outage.
Transfer-switch outlets
240V transfer-switch-ready outlets or a hardwire terminal block let an electrician feed your home panel.
Starting method
Electric or remote start is far easier than recoil on a large engine, especially in cold or an emergency.
Runtime and mobility
Tank size sets refueling frequency, while wheels and handles decide whether the heavy unit can be moved.
Our verdict
The Westinghouse 14500 Peak Watt Tri-Fuel is my top large portable pick. It runs on gas, propane or natural gas, delivers 11,500 running watts on gas from a 550cc engine, and adds remote start, low THD output and up to 19 hours of runtime, which makes it a capable, flexible backup for a larger home.
FAQs
The bigger models can. The Westinghouse 28000 approaches whole-home backup at 20,000 running watts, while units around 9,500 to 11,500 watts cover essential circuits through a transfer switch.
Through a transfer switch wired by a licensed electrician, using the generator's 240V transfer-switch-ready outlet or hardwire terminal. Never back-feed a generator into a regular outlet.
Tri-fuel adds natural gas, which can give effectively unlimited runtime during an extended outage if your home has a gas line, on top of gasoline and propane.
No. They produce carbon monoxide and must run outdoors, well away from the home, even with a CO shutdown sensor, since these are high-output fuel engines.
It varies with load, but these units list roughly 15 to 19 hours at partial load on a full tank. Higher loads shorten runtime, while a natural gas line removes the refueling concern.