Disclosure: I earn a commission if you buy through links on this page, at no extra cost to you. As an Amazon Associate I earn from qualifying purchases. Here's how I review generators.

Westinghouse WGen9500DF Review: A Lot of Generator for the Money, With One Catch

By Justin · Updated September 25, 2026

The WGen9500DF is the generator I see most often when people ask about running most of a house through a transfer switch without paying for a standby unit. It makes 9,500 running watts on gas, runs on propane too, and starts from a key fob. It also weighs over 200 pounds, the power isn't clean enough for everything, and it doesn't have a carbon monoxide sensor. That last one is the catch in the headline, and I'll get to it.

WGen9500DF Specs at a Glance

Specs from Westinghouse's product page. Runtime figures are the manufacturer's, and real runtime depends on what you plug in.

What I Like

It's easy to live with

Setup is about as simple as a generator this size gets. Put the wheels and handle on, add oil (it comes in the box), add fuel, connect the battery charger, and you're ready. Owners mention reliable starting over and over, and the fob means you can start it from inside when it's sleeting sideways. You still get a pull cord if the battery dies, and you'll be glad it's there the one time you need it.

Propane is the underrated feature

Gas goes stale. Leave it in a can for a few months without stabilizer and you're asking for a gummed-up carburetor right when the power goes out. Propane doesn't have that problem. A couple of full 20 lb tanks can sit in the shed for years and be ready. You give up about 1,000 running watts on propane, which most people won't notice.

Switching fuels is just a dial on the panel. My advice: use propane as your "sitting in storage" fuel, and keep gas as the backup for a long outage when propane tanks are hard to refill.

The outlets are set up for whole-home backup

The 30A twist-lock (L14-30R) is the outlet most manual transfer switches and interlock kits expect. The 50A (14-50R) lets you use a 50-amp inlet and cord, so you can get more of the generator's output into your panel. That 50A outlet matters. Plenty of generators in this price range stop at 30A, which caps you around 7,200 watts no matter how big the engine is.

You get a lot of watts per dollar

For the power you get, this is one of the better deals in portable generators, and it's a big reason this model shows up on so many shortlists. You're not paying for inverter technology or a brand-name premium. You're paying for a big engine and a big alternator.

What I Don't Like

No CO sensor on this version

Portable generators kill people every year, almost always from carbon monoxide when they're run in a garage, or right next to an open window. The newer WGen9500DFc is the same machine with a sensor that shuts the engine down if CO builds up. At Westinghouse's list prices, the DFc costs about $150 more. That's cheap insurance, and it's why I'd point most people to the DFc instead of this one.

Whichever you buy: run it outside, at least 20 feet from the house, with the exhaust pointed away from doors and windows. Put a battery-powered CO alarm inside the house too.

It will not run your whole house at once

9,500 watts sounds like a lot until you add up the big stuff. A central air conditioner, an electric water heater and an electric dryer can each take somewhere around 3,500 to 5,500 watts once they're running, and AC compressors need a much bigger surge to start. You can run one of those big loads with some of your essentials, but not all of them together. See the load table below.

It's heavy

At around 211 pounds, the wheels and fold-down handle get it across a driveway, but getting it up steps or into a truck bed is a two-person job. Figure out where it'll live and where it'll run before the storm, not during it.

The power isn't "clean"

Westinghouse rates THD (total harmonic distortion) at 23% or less. An inverter generator is typically under 3%. Most household stuff doesn't care: fridges, pumps, lights, power tools, microwaves. Where you can run into trouble is with some electronics, some variable-speed furnace blowers, and some high-efficiency appliance boards.

A regular surge protector won't fix this. It stops spikes, not a distorted waveform. If there's something you really need to protect, run it through a double-conversion (online) UPS, or power those few devices from a small inverter generator or portable power station instead.

It needs maintenance, and it doesn't like moisture

Some owners report problems after the unit has been exposed to rain or stored somewhere damp. It's an open-frame generator, so treat it that way. Run it under a generator tent or cover in wet weather, and store it somewhere dry. Change the oil after the break-in period and then on schedule, and either run the carburetor dry or use fuel stabilizer before long storage. Most "it won't start" stories trace back to old gas.

What Can the WGen9500DF Actually Run?

These are typical wattages. Check the labels on your own appliances, because they vary a lot. "Starting" watts only matter for a second or two, but you need room for the biggest one on top of everything already running.

A realistic outage setup: fridge, chest freezer, sump pump, furnace blower, well pump, lights and internet, plus the microwave now and then. That's roughly 6,500 running watts, and it fits with room left for starting surges. Add the electric water heater and you're over the limit. Run it on its own for an hour, turn it off, then go back to normal.

How Much Fuel Will You Need?

Using Westinghouse's own numbers:

• Light load (about 2,400 W): 6.6 gallons lasts about 12 hours. That's about 13 gallons a day.
• Medium load (about 4,750 W): 6.6 gallons lasts about 8 hours. That's about 20 gallons a day.
• Propane at medium load: a 20 lb tank lasts about 7 hours, so plan on 3 to 4 tanks a day.

For a three-day outage, that's 40 to 60 gallons of gas, or a stack of propane tanks. It's the math most people skip. Most people are better off running the generator in shifts (a few hours on to cool the fridge and pump water, then off) than running it nonstop.

Hooking It Up to Your House

The right way is a transfer switch or a panel interlock kit with a power inlet box, installed by a licensed electrician. Never "backfeed" through a dryer outlet with a double-male cord. That can electrocute a lineworker down the street and burn your house down.

One detail to bring up with your electrician: this generator has a bonded neutral. Depending on your transfer switch and local code, they may need to account for that. It's a five-minute conversation for them, and it's much better to have it before installation than after.

Want it automatic? This generator works with Westinghouse's WATS200 automatic transfer switch, which starts it on its own when the power goes out, even if you're not home.

WGen9500DF vs WGen9500DFc

If the DF is heavily discounted and you're disciplined about where you run it, it's still a solid buy. For most households, especially if anyone else might be the one setting it up in the dark, I'd spend the extra on the WGen9500DFc.

Also worth a look: Westinghouse lists the WGen10500DFc at the same price as this one, with 1,000 more watts, a 9.5-gallon tank, and a CO sensor. It weighs about 19 pounds more.

Questions People Ask

Can the WGen9500DF run central air?

Often yes, for a smaller system (roughly 3 tons or less), but not with everything else running at the same time. A soft-start kit on the AC makes it much more likely to start without tripping the breaker. Ask your HVAC tech before you count on it.

Is the WGen9500DF safe for computers and TVs?

Most modern electronics with switching power supplies handle it fine, but with THD up to 23% there's no guarantee. For anything expensive or critical, put a double-conversion UPS in between, or use an inverter generator for those devices.

How loud is it?

It's rated at 74 dBA, about as loud as a running vacuum cleaner a few feet away. You'll hear it inside, and your neighbors will too.

Can I buy it in California?

No. It isn't CARB compliant, so retailers won't ship it to California.

Gas or propane — which should I use?

Use propane when you want fuel that stores well and has less upkeep. Use gas when you need every watt or you're in a long outage and propane refills are hard to get. Having both options is the point of a dual-fuel generator.

How I Put This Review Together

I haven't run this exact unit myself. This review is based on Westinghouse's published specs, what owners report after living with it, and the watt and fuel math for a real outage. If I get one in to test, I'll add my own numbers here.

Bottom Line

The WGen9500DF does what most people buy it for. It keeps the fridge cold, the basement dry, the furnace running and the well pumping, and it does that for a lot less than a standby generator. It's heavy, the power isn't clean enough for everything, and you'll have to prioritize loads. None of that is unusual at this price.

The only thing I'd change is the model number. Get the DFc with the CO sensor if you can.

See the WGen9500DFc (with CO sensor) on Amazon See the WGen9500DF on Amazon