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DuroMax XP11000iH Inverter Generator vs Westinghouse iGen4500DFc Generator

These are two different classes of generator. The DuroMax XP11000iH is a whole-home backup unit: 9,000 running watts on gasoline, a 50A 14-50R outlet for a transfer switch or interlock, and under 3% THD. The Westinghouse iGen4500DFc is a portable, RV-oriented inverter: 3,900 running watts, a TT-30R outlet, and a claimed 52 dB. Buy the DuroMax if you are wiring a house panel; buy the Westinghouse if you need to run an RV, a few appliances, or a job site. Owners of the DuroMax praise its output and clean power; the Westinghouse is liked for quiet running and long runtime on a small tank.

  • Choose the DuroMax XP11000iH if you are backing up a house panel through a 50A inlet, interlock or transfer switch, or need to run a well pump, AC and fridge together.
  • Choose the Westinghouse iGen4500DFc if you want a lighter, quieter unit for an RV, tailgating or a few circuits, and 3,900 running watts is enough.

Prices

  • DuroMax XP11000iH Inverter Generator: $2,481.18 at Outbound Power (checked today)
  • Westinghouse iGen4500DFc Generator: $999.00 at Academy Sports + Outdoors (last seen Oct 30)
  • Difference: the Westinghouse iGen4500DFc Generator is $1,482.18 cheaper than the DuroMax XP11000iH Inverter Generator at the latest prices (Oct 30 and Nov 9)
DuroMax
DuroMax XP11000iH 11,000 Watt Portable Dual Fuel Inverter Generator - Quiet, Low THD

DuroMax XP11000iH Inverter Generator

DuroMax XP11000iH 11,000 Watt Portable Dual Fuel Inverter Generator - Quiet, Low THD

5(2 ratings)
$2,481.18at Outbound PowerVerified
See all prices and details
Visit Outbound Power
Pros
  • 9,000 running watts handles a whole house panel
  • 50A outlet works with interlocks and transfer switches
  • Under 3% THD, safe for electronics
  • Dual fuel on gas or propane
  • Parallel-capable for more power
Cons
  • Very heavy; not a carry-along unit
  • Louder than the Westinghouse at 61 dB
  • Needs a transfer switch or interlock to feed a panel
Westinghouse
Westinghouse iGen4500DFc Dual Fuel Inverter Generator

Westinghouse iGen4500DFc Generator

Westinghouse iGen4500DFc Dual Fuel Inverter Generator

$999.00at Academy Sports + OutdoorsObserved Oct 30, 2026, 7:23 AM
See all prices and details
Visit Academy Sports + Outdoors
Pros
  • Quiet at a claimed 52 dB
  • Up to 18 hours on one 3.4 gal tank
  • 105.8 lb and wheeled for portability
  • TT-30R outlet is RV ready
  • CO sensor and low-oil shutdown
Cons
  • 3,900 running watts won't carry a whole house
  • No 50A outlet for a panel hookup
  • Lower surge headroom for big motor loads

What separates them

DuroMax XP11000iH Inverter GeneratorWestinghouse iGen4500DFc Generator
Running watts (gas)9,000 W3,900 W
Peak watts (gas)11,000 W5,000 W
Propane output8,550 running / 10,450 peak WRuns on propane; lower output than gas
Home panel hookup50A 14-50R outlet for transfer switch or interlockTT-30R RV outlet, no 50A
WeightHeavy, wheeled unit meant to stay put105.8 lb, more portable
Noise61 dB at 25% load52 dB claimed
RuntimeNot stated; large tank for multi-day backupUp to 18 hours on 3.4 gal
Safety shutoffCO Alert sensorCO sensor plus low-oil shutdown

Price history

$2,499.00$999.00
Oct 30Nov 9
  • DuroMax XP11000iH Inverter Generator: lowest $2,479.95 on Nov 9 at Electric Motor Warehouse.
  • Westinghouse iGen4500DFc Generator: lowest $999.00 on Oct 30 at Home Depot; $999.00 on Nov 9.

Prices at every store

DuroMax XP11000iH Inverter Generator

  • Outbound PowerNew

    In stockReturn policy

    $2,481.18Verified
    Visit Outbound Power
  • Home DepotNew

    In stock

    $2,499.00+ $55.00 shippingObserved at 7:05 AM
    Visit Home Depot
  • Electric Motor WarehouseNew

    In stock

    $2,479.95+ $200.00 shippingObserved at 7:05 AM
    Visit Electric Motor Warehouse
  • Lowe'sNew

    Availability unknown

    $2,499.00+ $79.00 shippingObserved at 7:05 AM
    Visit Lowe's

Also available at

  • DuroMax Power EquipmentCheck price at DuroMax Power Equipment
All 17 stores and price history →

Westinghouse iGen4500DFc Generator

  • Academy SportsNew

    In stock

    $999.00+ $232.32 shippingObserved at 7:03 AM
    Visit Academy Sports
  • Academy Sports + OutdoorsNew

    Availability unknown

    $999.00Observed Oct 30, 2026, 7:23 AM
    Visit Academy Sports + Outdoors
  • Home DepotNew

    Availability unknown

    $999.00Observed Oct 30, 2026, 7:23 AM
    Visit Home Depot
  • Eco Trade CompanyNew

    Availability unknown

    $1,281.99Observed Oct 30, 2026, 7:23 AM
    Visit Eco Trade Company

Store links may earn us a commission. Some prices via Klarna.

All 7 stores and price history →

Specs compared

SpecDuroMax XP11000iH Inverter GeneratorWestinghouse iGen4500DFc Generator
Inverter Technology—Yes
CO Sensor—Yes
Low Oil Shutdown—Yes
Overload Protection—Yes
Automatic Shut Off—Yes (Automatic Low Oil and Carbon Monoxide (CO)…
Fuel Type—Dual Fuel, Gasoline
Fuel Capacity—3.4 gal
Fuel Gauge—Yes
Continuous Output—3900 running watts
Power Output—5000 peak watts
Runtime—Up to 18-hours (on a 3.4 Gal. gas tank)
Voltage—120V
Show all 35 specsShow fewer specs
SpecDuroMax XP11000iH Inverter GeneratorWestinghouse iGen4500DFc Generator
Peak Output—5000 peak watts
Starting Method—Remote start, Push button start
Efficiency—30% to 50% higher fuel efficiency than a tradit…
Frequency—60 Hz
Protection—Overload protection
Connectivity Ports—RV Ready TT-30R outlet
Number Of Outlets—5
Receptacle Type—TT-30R
Weight—105.8 lb
Depth

What reviewers say

DuroMax XP11000iH Inverter Generator

Buyers describe the XP11000iH as a capable whole-home backup unit with clean power and quieter running than expected.

What people mention
  • Power qualityPraisedOwners say the low-distortion inverter output runs electronics and appliances without issue.
  • NoisePraisedBuyers report it runs quieter than expected for its output, helped by variable idle.
  • Dual fuelPraisedOwners value running on propane when gasoline is inconvenient, accepting the small wattage drop.
  • Cord lengthCriticisedThe included generator cord is about 18 inches tip to tip, shorter than photos suggest.

Westinghouse iGen4500DFc Generator

Owners generally rate the iGen4500DFc well for easy starting, clean power and the dual-fuel option. Complaints center on weight and on reduced output when running on propane.

What people mention
  • Dual fuelPraisedOwners like having propane as a backup when gasoline is unavailable.
  • WeightCriticisedAt about 106 lb it takes two people or a ramp to load.
  • NoiseMixedQuiet at light load, but it gets loud when an RV air conditioner kicks on.
  • CO shutdownPraisedThe carbon monoxide sensor and auto shutoff are cited as a safety plus.

Questions and answers

Which is better for whole-home backup?
The DuroMax. Its 50A 14-50R outlet and 9,000 running watts let it feed a panel through a transfer switch or interlock. The Westinghouse tops out at 3,900 running watts and has no 50A outlet.
Which is quieter?
The Westinghouse, at a claimed 52 dB. The DuroMax is rated 61 dB at 25% load. Both use inverter technology and variable idle, so noise drops at light loads.
Can the Westinghouse run an RV air conditioner?
Usually yes for one RV AC, given its 5,000 peak watts and TT-30R outlet. Check your AC's surge draw. The DuroMax has far more headroom if you run AC plus other loads.
Which lasts longer?
Both are durable inverter units with CO shutdown and low-oil protection. The DuroMax uses an AGM battery with a tender included, which helps cold starts. Longevity depends more on oil changes and load management than on the brand.
Is the DuroMax worth stepping up to?
Only if you need panel backup or high simultaneous loads. For RV use, camping or a few circuits, the Westinghouse is lighter, quieter and runs longer on a tank.
Do both run on propane?
Yes. Both are dual fuel. Propane lowers output on each; the DuroMax is rated 8,550 running watts on propane versus 9,000 on gas.

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Buying guides that pick them

  • Best dual fuel inverter generators
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24.5 in
Height—20 in
Width—17.5 in
Noise Level (dB)—52
Electric Start—Yes
Power Source—Gas
Time Usage (max) (h)—18.0
Voltage (V)—120.0
Output Power (W)—4500
Features—USB - Type C
No. of Power Outlets—3
Voltage Outlet—2x120 V, 120 V
Weight (lb)—125.0
Length (")—29.6