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Westinghouse iGen4000DFc

Ranked #5 of 30 in Best Portable Inverter Generators: Champion, Westinghouse, WEN, DuroMax & FIRMAN (2026). Here is every spec we scored, where it came from, and how it compares.

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W

#5

Westinghouse iGen4000DFc

Best for: Dual fuel 3,300 W at 52 dBA

5.9/10

What we like

Watch out for

Lowest runtime at 25% load in this comparison (7 h)
Runtime at 50% load not published by Westinghouse

Score breakdown

Running watts (gasoline) 25%

Runtime at 25% load 15%

Runtime at 50% load * 5%

Noise 15%

Weight 10%

CO shutoff 10%

Runs on propane 10%

CARB compliant 5%

Parallel capable 5%

* Not published by the manufacturer; scored at the lowest published value in this category, so an unpublished figure never outranks a published one.

Running watts (gasoline)	3300 W
Runtime at 25% load	7 h
Runtime at 50% load	Not listed
Noise	52 dBA
Weight	62.8 lb
CO shutoff	Yes
Runs on propane	Yes
CARB compliant	No
Parallel capable	Yes
Starting (peak) watts, gasoline	4,000 W
Running watts on propane	2,970 W
Fuel tank	1.69 gal
Outlets	1 Duplex 120V 5-20R, 1 120V TT-30R, 2 USB
CO shutoff	CO sensor shutdown
Price	Check price

Check price at Amazon

Specs source:

Westinghouse: iGen4000DFc

Westinghouse iGen4000DFc head-to-head

Head-to-headWestinghouse iGen4000DFc vs Champion 4500W Electric Start Dual Fuel Inverter (201319) Featured inBest Quiet Inverter Generators (2026)

How it compares

Open the full comparison table

Westinghouse iGen5000DFc

#1 · EFI dual fuel with 18 h at quarter load and 52 dBA

Champion 6500W Dual Fuel Inverter (201532)

#2 · Most running watts here on a 64 dBA rating, with an L14-30R

DuroMax XP7000iH

#3 · 5,500 W dual fuel inverter with an L14-30R

Westinghouse iGen2550DFc

#4 · Small dual fuel with a TT-30R RV outlet

Champion 4500W Electric Start Dual Fuel Inverter (201319)

#6 · 3,500 W dual fuel with 14 h at quarter load

WEN DF500iX

#7 · 120/240V dual fuel with 9 h at half load

Champion 2000W Dual Fuel Inverter (201230)

#8 · 2,000 W dual fuel with CO Shield at 39.5 lb

Champion 2500W Dual Fuel Inverter (201323)

#9 · Small dual fuel inverter at 53 dBA

DuroMax XP2300iH

#10 · Small dual fuel inverter at 52 dB

FIRMAN WH03342

#11 · Whisper dual fuel at 58 dB

WEN DF680iX

#12 · 5,100 W dual fuel with an L14-30R

Champion 5500W Dual Fuel Inverter (201561)

#13 · 4,000 W dual fuel with CO Shield and an RV outlet

Champion 4500W Dual Fuel Inverter (201531)

#14 · Light 4,500 W-peak dual fuel at 51.8 lb

WEN DF480iX

#15 · 4,000 W dual fuel with 7 h at half load

WEN DF525iX

#16 · Same 4,200 W on gas or propane

Champion 4000W Dual Fuel Inverter (201050)

#17 · 3,000 W dual fuel inverter at 51.8 lb

FIRMAN WT03571

#18 · Tri-fuel inverter at 52 lb

WEN DF280iX

#19 · 2,250 W dual fuel with 9 h at half load

Westinghouse iGen2550c

#20 · 1,900 W, 40 lb, TT-30R

Westinghouse iGen2800c

#21 · 2,200 W at 52 dBA with 12 h at quarter load

Westinghouse iGen4000c

#22 · Gas 3,300 W with remote start and 52 dBA

WEN DF360iX

#23 · 2,900 W dual fuel at 49 lb

Westinghouse iGen1500c

#24 · Smallest here: 1,000 W at 32 lb

Champion 5500W Inverter (201560)

#25 · 4,000 W gas-only inverter at 73.4 lb

WEN 56432iX

#26 · 3,600 W gas inverter at 53 lb

Champion 3400W Electric Start Dual Fuel Inverter (100396)

#27 · 3,100 W dual fuel with an L5-30R

Champion 2500W Inverter (201490)

#28 · Lightest generator here at 37.7 lb

Champion 4500W Inverter (201318)

#29 · 3,500 W gas inverter with 14 h at quarter load

WEN 56250iX

#30 · Light 1,900 W gas inverter at 37.5 lb