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Westinghouse iGen4500DFc Generator vs Generac iQ3800 Dual Fuel Inverter Generator

The Westinghouse iGen4500DFc is the stronger pick for most shoppers. It makes more power on both fuels, runs longer on a tank of gas, and has a much larger track record of owner ratings. The Generac iQ3800 is quieter in real-world use and its COsense shutdown is well regarded, but it gives up roughly 900 running watts and costs you headroom for bigger loads. Buy the Westinghouse for RV air conditioners and home backup; buy the Generac for lighter loads where noise matters most.

  • Choose the Westinghouse iGen4500DFc if you need to run an RV air conditioner, a well pump or a fridge plus a few small loads at once, or you want the longest gas runtime and the most owner feedback to lean on.
  • Choose the Generac iQ3800 if your loads are modest, you value quiet operation and Generac's COsense shutdown, and you want a proven brand name for small electronics and tailgating.

Prices

  • Westinghouse iGen4500DFc Generator: $949.00 at Walmart (checked today)
  • Generac iQ3800 Dual Fuel Inverter Generator: $849.00 at Blain's Farm & Fleet (checked today)
  • Difference: the Generac iQ3800 Dual Fuel Inverter Generator is $100.00 cheaper than the Westinghouse iGen4500DFc Generator today
Westinghouse
Westinghouse iGen4500DFc Dual Fuel Inverter Generator

Westinghouse iGen4500DFc Generator

Westinghouse iGen4500DFc Dual Fuel Inverter Generator

4.7(5,381 ratings)
$949.00at WalmartChecked 2 h ago
See all prices and details
Visit Walmart
Pros
  • 3900 running watts handles an RV air conditioner plus small loads
  • Up to 18 hours on one tank of gas
  • Remote start fob and push-button start
  • Under 3% THD, safe for laptops and TVs
  • Large body of owner ratings
Cons
  • About 106 lb, heavy to lift into a truck bed
  • No recoil pull start listed as a backup
  • Propane output drops below the gas rating
  • Bulky suitcase frame takes up storage space
Generac
Generac iQ3800 Duel Fuel Inverter Generator

Generac iQ3800 Dual Fuel Inverter Generator

Generac iQ3800 Duel Fuel Inverter Generator

4.3(396 ratings)
$849.00at Blain's Farm & FleetChecked 1 h ago
See all prices and details
Visit Blain's Farm & Fleet

Store links may earn us a commission. Price via Klarna.

Pros
  • Very quiet in owner reports
  • COsense shuts the engine down on dangerous CO levels
  • Auto-choke electric start with a recoil backup
  • LED display shows output and gas consumption
  • Runs on a standard 20 lb propane tank for longer propane runtime
Cons
  • 3000 running watts limits what you can run at once
  • Shorter gas runtime than the Westinghouse
  • No remote start
  • Smaller pool of owner ratings

What separates them

Westinghouse iGen4500DFc GeneratorGenerac iQ3800 Dual Fuel Inverter Generator
Running watts on gas3900 W3000 W
Running watts on propaneHigher propane output than gas rivals in its class2700 W on propane
Peak watts5000 W3800 W gas / 3400 W propane
Runtime at half loadUp to 18 hours on 3.4 gal of gas13 hours on gas, 16 hours on a 20 lb propane tank
Noise52 dB claimedFully enclosed case; owners consistently call it very quiet
CO shutdownAutomatic CO shutdown sensorCOsense technology that stops the engine
StartingRemote fob and push buttonPush-button electric start with auto-choke, plus recoil backup
Owner feedback volume4.7 from over 5,000 ratings4.3 from under 400 ratings

Price history

$999.00$849.00
Oct 30Nov 11
  • Westinghouse iGen4500DFc Generator: lowest $949.00 on Nov 10 at Walmart; $999.00 on Nov 11.
  • Generac iQ3800 Dual Fuel Inverter Generator: lowest $849.00 on Nov 3 at Walmart; $849.00 on Nov 11.

Prices at every store

Westinghouse iGen4500DFc Generator

  • WalmartNew

    In stockSold by Westinghouse Outdoor Power

    $949.00Free shippingChecked 2 h ago
    Visit Walmart
  • Academy SportsNew

    In stock

    $999.00+ $232.32 shippingChecked Nov 9
    Visit Academy Sports
  • AmazonNew

    Availability unknown

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

    $949.00Free shippingChecked 2 h ago
    Visit Amazon
  • Academy Sports + OutdoorsNew

    Availability unknown

    $999.00Checked Oct 30
    Visit Academy Sports + Outdoors

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

All 10 stores and price history →

Generac iQ3800 Dual Fuel Inverter Generator

  • Blain's Farm & FleetNew

    In stock

    $849.00Checked 1 h ago
    Visit Blain's Farm & Fleet
  • Lowe'sNew

    In stock

    $849.00Free shippingChecked 1 h ago
    Visit Lowe's
  • FactoryPureNew

    In stock

    $928.00Free shippingChecked Nov 9
    Visit FactoryPure
  • AmazonNew

    Availability unknown

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

    $849.00Free shippingChecked 2 h ago
    Visit Amazon

Also available at

  • WalmartCheck price at Walmart
  • Renewable OutdoorsCheck price at Renewable Outdoors

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

All 22 stores and price history →

Specs compared

SpecWestinghouse iGen4500DFc GeneratorGenerac iQ3800 Dual Fuel Inverter Generator
Inverter TechnologyYesYes
CO SensorYesYes (COsense® Technology)
Low Oil ShutdownYesYes
Overload ProtectionYesHelps you to avoid overloading (via LED display)
Automatic Shut OffYes (Automatic Low Oil and Carbon Monoxide (CO)…STOPS (COsense® Technology)
Fuel TypeDual Fuel, GasolineDual Fuel, Gasoline
Fuel Capacity3.4 gal3.2 gal
Fuel GaugeYesYes (for the gasoline tank), No (for propane)
Continuous Output3900 running watts3000 W
Power Output5000 peak watts3800 W (Starting Watts)
Voltage120V120-volt
Peak Output5000 peak watts3800 W
Show all 40 specsShow fewer specs
SpecWestinghouse iGen4500DFc GeneratorGenerac iQ3800 Dual Fuel Inverter Generator
Starting MethodRemote start, Push button startElectric Start / Recoil Pull Start
Efficiency30% to 50% higher fuel efficiency than a tradit…Reduces fuel consumption (when Economy Switch i…
Frequency60 Hz60Hz (target)
Connectivity PortsRV Ready TT-30R outletUSB Ports
Number Of Outlets55 (120-volt outlets)
Receptacle TypeTT-30RTwist lock (120V, 30-amp)
Weight105.8 lb107
Depth24.5 in24.6 in
Height20 in

What reviewers say

Westinghouse iGen4500DFc Generator

  • 4.7 / 55,381 ratings

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.

Generac iQ3800 Dual Fuel Inverter Generator

  • 4.3 / 5396 ratings

Owners of Generac inverter generators generally praise the quiet inverter output and the dual-fuel flexibility, and the CO shutdown is seen as a real safety plus. Complaints tend to center on weight and on the lower output when running on propane.

What people mention
  • WeightCriticisedOwners say 107 lb makes it a two-person lift and awkward to move without wheels.
  • Dual fuelPraisedBuyers like having propane as a fallback when gasoline runs out or is hard to store.
  • Power qualityPraisedUnder 3% THD is cited as safe for laptops, TVs and other sensitive electronics.
  • CO safetyPraised

Questions and answers

Which one runs an RV air conditioner?
The Westinghouse. At 3900 running watts it has the headroom for a 13,500 BTU RV air conditioner plus a few small loads. The Generac's 3000 watts is tight for that and leaves little room for anything else.
Which is quieter?
The Generac has the better reputation for quiet running, helped by its fully enclosed case. The Westinghouse claims 52 dB, but owners report it gets louder under heavy load.
Which lasts longer on propane?
The Generac runs about 16 hours on a 20 lb propane tank at half load. The Westinghouse's 18-hour figure is for gasoline, and its propane runtime is shorter than that.
Is the Westinghouse worth stepping up to?
Yes if you need the extra watts or the remote start. The Generac is the better fit if your loads are small and quiet operation matters more than capacity.
Do both protect against carbon monoxide?
Yes. Both shut the engine down automatically when CO builds up, and both have low-oil shutdown and overload protection.
Can either run sensitive electronics?
Both produce power under 3% total harmonic distortion, which is clean enough for laptops, phones and TVs.

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22.4 in
Width17.5 in20.3 in
Power SourceGasGasoline
SizeiGen5000DFc3800W
colorBlueOrange
RuntimeUp to 18-hours (on a 3.4 Gal. gas tank)—
ProtectionOverload protection—
Noise Level (dB)52—
Electric StartYes—
Time Usage (max) (h)18.0—
Voltage (V)120.0—
Output Power (W)4500—
FeaturesUSB - Type C—
No. of Power Outlets3—
Voltage Outlet2x120 V, 120 V—
Weight (lb)125.0—
Length (")29.6—
Continuous Wattage3700W—
Run Time18 h—
Surge Wattage4500W—
The COsense auto shutoff is mentioned as a reassuring feature for indoor-adjacent use.
Best dual fuel inverter generators for home backup and camping