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FlexPower 4500ies Inverter Generator vs Westinghouse iGen5000 Generator

Both are 224cc inverter generators with electric start, so the real split is output versus portability. The FlexPower 4500ies is lighter and has a 30A RV receptacle plus a telescoping handle, which suits travel-trailer owners who move it often. The Westinghouse iGen5000 makes more power, runs longer on a tank, adds wireless remote start and a 3-year warranty, and is the stronger pick for home backup and long campouts. Owners of the FlexPower call it quiet and capable for the size; the iGen5000 is the more feature-complete machine if you can handle the extra weight.

  • Choose the FlexPower 4500ies if you tow an RV, want a lighter unit with a built-in 30A outlet and a telescoping handle, and value quiet running over maximum output.
  • Choose the Westinghouse iGen5000 if you want more watts, longer run times, remote start and a 3-year warranty, and don't mind a heavier unit.

Prices

  • FlexPower 4500ies Inverter Generator: $849.00 at Flex Power (checked today)
  • Westinghouse iGen5000 Generator: $799.00 at Amazon (checked today)
  • Difference: the Westinghouse iGen5000 Generator is $50.00 cheaper than the FlexPower 4500ies Inverter Generator today
FlexPower
FlexPower 4500ies Quiet Inverter Generator with Electric Start

FlexPower 4500ies Inverter Generator

FlexPower 4500ies Quiet Inverter Generator with Electric Start

4.8(44 ratings)
$849.00at Flex PowerChecked 4 h ago
See all prices and details
Visit Flex Power
Pros
  • Light enough for one person to load and move
  • Built-in 30A RV receptacle for travel trailers
  • Telescoping handle and wheels aid transport
  • Quiet enough for National Forest Service approval
  • Electric start with recoil backup
Cons
  • Lower continuous and peak watts than the iGen5000
  • No published run time per tank
  • No remote start
  • Warranty terms not spelled out
Westinghouse
Westinghouse iGen5000

Westinghouse iGen5000 Generator

Westinghouse iGen5000

$799.00at AmazonChecked 6 h ago
See all prices and details
Visit Amazon

Store links may earn us a commission. As an Amazon Associate, Deal.ai earns from qualifying purchases.

Pros
  • More continuous and peak power
  • Long run times: up to 18 hours at 25% load
  • Wireless remote start from up to 109 yards
  • Low noise, as low as 52 dBA
  • 3-year limited warranty
Cons
  • About 23 lb heavier, harder to lift alone
  • No 30A RV receptacle listed
  • Larger footprint for tight storage

What separates them

FlexPower 4500ies Inverter GeneratorWestinghouse iGen5000 Generator
Continuous output3600 W3900 W
Peak output4500 W5000 W
Weight82 lb104.7 lb
Fuel capacity and run time7 L tank, no published run time3.4 gal, up to 18 hours at 25% load and 15 hours at 50%
StartingElectric start plus recoil backupPush-button electric start plus wireless remote up to 109 yards
Outlets4 AC 120V plus one 30A RV receptacleStandard AC outlets, no RV receptacle listed
NoiseUnder 63 dBAs low as 52 dBA
WarrantyNot stated in the listing3-year limited

Price history

$849.00$799.00
Nov 2Nov 12
  • FlexPower 4500ies Inverter Generator: lowest $849.00 on Nov 2 at Flex Power; $849.00 on Nov 10.
  • Westinghouse iGen5000 Generator: lowest $799.00 on Nov 12 at Amazon.

Prices at every store

FlexPower 4500ies Inverter Generator

  • Flex PowerNew

    In stockReturn policy

    $849.00Checked 4 h ago
    Visit Flex Power
  • Camping WorldNew

    In stock

    $859.00Free shippingChecked Nov 10
    Visit Camping World
  • FactoryPureNew

    Availability unknown

    $849.00Checked Nov 5
    Visit FactoryPure
  • RVMPNew

    Availability unknown

    $999.00Checked Nov 5
    Visit RVMP

Also available at

  • Flex PowerCheck price at Flex Power
All 4 stores and price history →

Westinghouse iGen5000 Generator

  • WalmartNew

    In stockSold by Westinghouse Outdoor PowerReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.

    $849.00Free shippingChecked 4 h ago
    Visit Walmart
  • The Home DepotNew

    In stock

    $899.00Free shippingChecked 6 h ago
    Visit The Home Depot
  • AmazonNew

    Availability unknown

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

    $799.00Free shippingChecked 6 h ago
    Visit Amazon

Store links may earn us a commission.

All 3 stores and price history →

Specs compared

SpecFlexPower 4500ies Inverter GeneratorWestinghouse iGen5000 Generator
Starting MethodElectric startPush-Button Electric Start and wireless remote …
Weight82.00 lb104.7 lb.
Noise Level<63 Decibelsas low as 52 dBA
Inverter TechnologyYes—
Fuel TypeGasoline—
Fuel Capacity7 L—
Continuous Output3600 W—
Power Output3600 W—
Voltage120V—
Peak Output4500 W—
EfficiencyEco-mode for energy saving—
Frequency60Hz—
Show all 34 specsShow fewer specs
SpecFlexPower 4500ies Inverter GeneratorWestinghouse iGen5000 Generator
ProtectionOverload indicators—
Connectivity Ports30A RV receptacle—
Number Of Outlets5 (4 AC 120V, 1 30A RV Receptacle)—
Receptacle Type30A RV Receptacle—
Depth23.81 in—
Height22.04 in—
Width12.59 in—
Auto Idle ControlEco-mode for energy saving—
Electric StartYes—
Recoil Start

What reviewers say

FlexPower 4500ies Inverter Generator

  • 4.8 / 544 ratings

Buyers rate it 4.8 out of 5 across 44 ratings. Owners call it much quieter than expected and say it does the job of a larger generator for travel trailer and emergency use.

What people mention
  • NoisePraisedOwners say it runs much quieter than they expected.
  • Power outputPraisedBuyers describe it as twice the machine compared to a Honda 2200.
  • RV usePraisedIt is recommended by owners running it in a travel trailer.
  • Backup usePraisedBuyers say it works well for emergency power at home.

Questions and answers

Which is better for powering an RV?
The FlexPower 4500ies has a dedicated 30A RV receptacle, so it plugs straight into a travel trailer. The iGen5000 makes more watts but needs an adapter for a 30A RV cord.
Which one runs longer on a tank?
The Westinghouse iGen5000. It runs up to 18 hours at 25% load and 15 hours at 50% load. FlexPower does not publish a run time for the 4500ies.
Which is quieter?
The iGen5000 is rated as low as 52 dBA. The FlexPower 4500ies is rated under 63 dB. Both are quiet for their class, but Westinghouse has the lower figure.
Is the iGen5000 worth stepping up to?
Yes if you need more watts, remote start, longer run times and a 3-year warranty. Stay with the FlexPower if weight and the RV outlet matter more.
Can I lift either one into a truck alone?
The FlexPower at 82 lb is manageable for most adults, and its telescoping handle helps. The iGen5000 at 104.7 lb is a two-person lift for many people.
Do both produce clean power for electronics?
Yes. Both are inverter generators, and the iGen5000 lists under 3% total harmonic distortion. That is safe for laptops, phones and most sensitive devices.

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Buying guides that pick them

  • Best 4000-watt inverter generators with electric start
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Yes
—
Engine TypeOHV—
Engine Displacement224cc—
Model—IGEN5000
Peak watts—5000 Peak Watts
Rated watts—3900 Rated Watts
Run time—Up to 18 Hour Run Time at 25% Load
Fuel tank size—3.4-gallon
Total harmonic distortion—less than 3% THD
Warranty—3-year limited warranty
Remote start range—up to 109 yards
Engine—224cc Westinghouse OHV 4-Cycle Engine
Run time at 50% load—15 Hours