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WEN DF480iX vs WEN DF451i Dual Fuel Inverter Generator

Buy the WEN DF480iX for more power per dollar: 4000 rated watts on gasoline and a CO shutdown sensor, at $647.00 at Amazon as of November 5, 2026. Buy the WEN DF451i if quiet running matters most: it is rated 58 dB against 62 dB, and it costs $879.99 at Walmart as of November 5, 2026. The DF480iX is the better value for most shoppers; the DF451i is the quieter, lower-output machine.

Today the WEN DF480iX costs $232.99 less at its best price.

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WEN
WEN DF480iX

WEN DF480iX

4.7· 97 ratings
$647.00at AmazonObserved at 11:42 AM
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Choose the WEN DF480iX if you want the most rated watts for the money, need a CO shutdown sensor, or plan to run it on a 20 lb propane tank for long stretches.

Pros
  • 4000 rated watts on gasoline runs a 15,000 BTU RV air conditioner plus fridge and lights.
  • Watchdog CO sensor shuts the unit down at dangerous carbon monoxide levels.
  • 78.5 lbs with wheels and a telescoping handle; about 21 lbs lighter than the DF451i.
  • Four 120V outlets plus TT-30R, 12V DC and two USB ports.
  • $647.00 at Amazon as of November 5, 2026, about $233 less than the DF451i.
Cons
  • 62 dB at quarter load is louder than the DF451i's 58 dB.
  • 1.9-gallon tank gives about 7 hours at half load on gasoline, shorter than the DF451i's 9 hours.
  • Propane output drops to 3600 rated watts.
  • No digital load or fuel display.
WEN
WEN Super Quiet 4500-Watt Electric Start Dual Fuel RV-Ready Portable Inverter Generator with Fuel Shut-Off (DF451i)

WEN DF451i Dual Fuel Inverter Generator

WEN Super Quiet 4500-Watt Electric Start Dual Fuel RV-Ready Portable Inverter Generator with Fuel Shut-Off (DF451i)

5· 3 ratings
$879.99at WalmartObserved at 11:43 AM
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Choose the WEN DF451i if low noise is the priority and 3500 rated watts on gasoline covers your loads.

Pros
  • 58 dB at quarter load, 22 feet, is among the quietest in this class.
  • Total harmonic distortion under 0.3% at no load and under 1.2% at full load.
  • Auto Fuel Selection Technology switches from propane to gasoline for longer run times.
  • Digital load and fuel display.
  • 9-hour run time.
Cons
  • 3150 rated watts on propane limits heavy loads.
  • 100 lbs is heavy for one person to lift into a truck bed.
  • Only two 120V outlets and one USB port.
  • $879.99 at Walmart as of November 5, 2026, about $233 more than the DF480iX.
  • No carbon monoxide shutdown sensor listed.

What separates them

WEN DF480iXWEN DF451i Dual Fuel Inverter Generator
Rated watts, gasoline4000 W3500 W
Rated watts, propane3600 W3150 W
Surge watts4800 W gasoline, 4320 W propane4500 W on both fuels
Noise at quarter load62 dB58 dB at 22 ft
Engine224cc212cc
Weight78.5 lbs100 lbs
Outlets4x 120V, TT-30R, 12V DC, 2x USB2x 120V, TT-30R, 12V DC, 1x USB
Carbon monoxide shutdownYes, Watchdog CO sensorNot listed

Price history

$879.99$647.00
Nov 1Nov 5
  • WEN DF480iX: lowest $647.00 on Nov 1 at Amazon; $647.00 on Nov 5.
  • WEN DF451i Dual Fuel Inverter Generator: lowest $879.99 on Nov 5 at Walmart.

Prices at every store

WEN DF480iX

  • Home DepotNew

    In stock

    $647.00Free shippingObserved at 11:33 AM
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  • eBayNew

    In stockSold by wen_products

    $749.99Free shippingObserved at 11:36 AM
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  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $647.00Free shippingObserved at 11:42 AM
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  • Lowe'sNew

    Availability unknown

    $647.00Free shippingObserved at 11:33 AM
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Also available at

  • WEN ProductsCheck price at WEN Products
  • eBayCheck price at eBay
  • Northern ToolCheck price at Northern Tool
All 7 stores and price history →

WEN DF451i Dual Fuel Inverter Generator

  • WalmartNew

    In stock

    $879.99Free shippingObserved at 11:43 AM
    Visit store
  • WEN ProductsNew

    In stock

    $879.99Free shippingObserved at 11:43 AM
    Visit store
  • eBayNew

    In stockSold by salespla0

    $1,246.79Free shippingObserved at 11:43 AM
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  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $879.99Free shippingObserved at 11:43 AM
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Also available at

  • WEN ProductsCheck price at WEN Products
All 4 stores and price history →

Specs compared

SpecWEN DF480iXWEN DF451i Dual Fuel Inverter Generator
Fuel TypeGasoline, Dual Fuel, PropanePropane, Gasoline
Weight78.5 lbs100 lbs
Engine displacement224cc—
Gasoline surge watts4800 surge watts—
Gasoline rated watts4000 rated watts—
Propane surge watts4320 surge watts—
Propane rated watts3600 rated watts—
Fuel tank capacity1.9-gallon—
Runtime gasolineup to 7 hours of half-load run time—
Runtime propane12 hours half-load run time on a 20-pound LPG t…—
Voltage120 volts—
Inverter TechnologyYes—
Show all 40 specsShow fewer specs
SpecWEN DF480iXWEN DF451i Dual Fuel Inverter Generator
Continuous Output4000 rated watts (gasoline)—
Power Output4800-Watt—
Runtime7 hours (half-load, 1.9-gallon tank)—
Peak Output4800 surge watts (gasoline)—
Starting MethodElectric start—
ProtectionOverload protection—
CO SensorYes—
Low Oil ShutdownYes—
Overload ProtectionYes—
Automatic Shut Off

What reviewers say

WEN DF480iX

  • 4.7 / 597 ratings

With 4.7 out of 5 from 97 ratings, owners generally report it starts easily, runs quietly and handles RV and home backup loads well. Dual-fuel flexibility and the CO shutdown are recurring points of praise.

Pros
  • Quiet running compared with conventional generators
  • Reliable electric start
  • Propane option extends runtime and avoids stale gas
  • Clean power for electronics
Cons
  • Heavy for one person to move
  • Short gasoline runtime at higher loads
  • Propane reduces available wattage

WEN DF451i Dual Fuel Inverter Generator

Owners of WEN's dual-fuel inverter line generally praise quiet operation, easy electric starting and clean power for electronics. Common complaints center on weight and the reduced output on propane.

What people mention
  • NoisePraisedOwners say it runs quietly enough for campgrounds and residential areas.
  • StartingPraisedThe push-button electric start is reported to be reliable, with the recoil cord as backup.
  • WeightCriticisedAt 100 lbs, owners find it hard to lift alone despite the wheels and handle.
  • Propane outputMixed

Questions and answers

Which is better for running an RV air conditioner?
The DF480iX. Its 4000 rated watts on gasoline and 3600 on propane give more headroom for a 13,500 or 15,000 BTU air conditioner plus other loads. The DF451i's 3150 propane watts leave little margin.
Which one is quieter?
The DF451i, at 58 dB at quarter load measured at 22 feet. The DF480iX is rated 62 dB at quarter load. Both are quiet enough for campgrounds with generator hours.
Is the DF451i worth the extra $233?
Only if noise is your top concern. The DF480iX gives 500 more rated watts on gasoline, a CO shutdown sensor, more outlets and 21 lbs less weight for less money.
Which runs longer on a tank?
The DF451i, at about 9 hours. The DF480iX runs about 7 hours at half load on its 1.9-gallon tank, or about 12 hours on a 20 lb propane tank.
Do both have electric start?
Yes. Both have keyless push-button electric start with a recoil starter as backup, and both have a fuel shut-off for easier maintenance.
Which is easier to move?
The DF480iX at 78.5 lbs with onboard wheels and a telescoping pull handle. The DF451i weighs 100 lbs and has wheels plus a carrying handle.

More comparisons

  • WEN DF480iX vs WEN Super Quiet 4000-Watt RV-Ready Electric Start Portable Inverter Generator with Fuel Shut-Off and CO Watchdog (56400iX)
  • 3800W Gas/Propane Dual Fuel Inverter Generator w/ CO Alert HB5040DC vs WEN DF480iX
  • BILT HARD 5500W Dual Fuel Inverter Generator vs WEN DF480iX
  • WEN DF480iX vs GENMAX GM4000iSBEPC 3200W/4000W 26.7 Amp Electric Start Gas Inverter Generator Parallel Ready with CO Detect
  • WEN DF480iX vs FlexPower 4500ies Quiet Inverter Generator with Electric Start
  • Pulsar 5000-Watt Dual Fuel RV Ready Inverter Generator with Remote Start and CO Sentry vs WEN DF480iX
  • FlexPower 4500ies Quiet Inverter Generator with Electric Start vs WEN Super Quiet 4500-Watt Electric Start Dual Fuel RV-Ready Portable Inverter Generator with Fuel Shut-Off (DF451i)

Buying guides that pick them

  • Best 4000-watt inverter generators with electric start
  • Best dual fuel inverter generators
  • Best 4000W inverter generators with electric start
Yes (Fuel shut-off), Yes (CO Shutdown Sensor)
—
Fuel Capacity1.9-gallon—
Fuel GaugeYes—
Number Of Outlets4 (three-prong 120V receptacles)—
Receptacle TypeTT-30R—
Depth24"—
Height22.1 in—
Width12.6 in—
Noise Level62 decibels (at quarter load)—
Typical UsersRV enthusiasts, Camping, Hunting, RV-Ready, Tai…—
Continuous wattage—3150W
Run time—9 h
Surge wattage—4500 W
Decibel rating—58 dB
Outlets—5
Brand—WEN
Features—Overload Protection
Motor starter type—Push Button Start, Pull Cord Start
Rec. use—Commercial, Residential
Dual fuel is valued, but running watts drop to 3,150 on propane.