★ Best dual fuel

Westinghouse WGen9500DF

The WGen9500 with a propane lifeline for when the gas stations go dark.

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Specs

Running watts	9,500 W
Starting watts	12,500 W
On propane	8,500 W run · 11,200 W start
Type	Open frame
Fuel	Dual fuel (gas + propane)
Fuel tank	6.6 gal
Runtime (mfr claim)	up to ~12 h on gasoline at 25% load
Outlets	Two 20A 125V GFCI, L14-30R (transfer switch), 14-50R (240V/50A)
Start	Electric + remote fob
CO safety shutoff	Varies by version — check the listing
Typical street price	~$1,300 (as of July 2026 — check listing for current price)

Figures are the manufacturer's published specs; dashes mean the maker doesn't publish a number. Verify against the current datasheet before you buy.

What can it actually run?

Checked with the same math as our calculator: total running watts, plus the single largest motor surge on top. “Tight” means it technically fits but the load sits above 80% of rated output — fine briefly, not where you want to live.

Fridge, Wi-Fi, and lights
730 W running · 2,230 W peak
✓ runs it
Storm essentials (fridge, freezer, furnace fan, sump pump)
3,080 W running · 4,670 W peak
✓ runs it
Essentials plus a 10,000 BTU window AC
4,280 W running · 6,680 W peak
✓ runs it
Most of the house (well pump, central AC, laundry)
13,680 W running · 35,930 W peak
✗ too much

The installer's take

Same platform as the WGen9500, plus a propane regulator. After a real storm, gasoline is the thing everyone is queuing for; a 100 lb propane cylinder in the garage sidesteps the whole mess at the cost of about 1,000 output watts while on LP. For a hurricane-belt household this is the more rational buy for the extra $200.

Pros

All the WGen9500 hardware plus fuel flexibility
Runs on stored propane that never goes stale
Remote + electric start

Cons

~10% output derate on propane
Same 220-lb-class bulk and open-frame noise

Best for: Storm-country whole-essentials backup with propane as the storage fuel.

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Don't forget the consumables

Whatever you buy needs oil every 50-100 running hours, stabilised fuel if it sits between outages, and a CO alarm indoors. Cheap, and the reason a stored generator either starts or doesn't.

All accessories & consumables →

Compare it

Westinghouse WGen9500 vs. Westinghouse WGen9500DF Westinghouse WGen9500DF vs. DuroMax XP12000EH Dual Fuel