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Genmax GM9000iET Tri-Fuel Inverter Generator vs Westinghouse Tri-Fuel Home Backup Generator

These are two very different classes of generator. The Genmax is a portable inverter unit you can wheel to a job site, tailgate or RV, with clean sub-3% THD power and three start methods. The Westinghouse is a 557 lb home-backup machine that needs a pad, a transfer switch and ideally two people to move, but it runs a whole house. Buy the Genmax for portability and sensitive electronics; buy the Westinghouse if you are wiring a home standby setup.

  • Choose the Genmax if you need a wheelable generator for an RV, job site or tailgate that can run electronics safely and start from a remote or a button.
  • Choose the Westinghouse if you are setting up whole-home backup with a transfer switch and can give a 557 lb unit a permanent spot.

Prices

  • Genmax GM9000iET Tri-Fuel Inverter Generator: $1,260.00 at Walmart (checked today)
  • Westinghouse Tri-Fuel Home Backup Generator: $1,407.30 at Crenvu (checked today)
  • Difference: the Genmax GM9000iET Tri-Fuel Inverter Generator is $147.30 cheaper than the Westinghouse Tri-Fuel Home Backup Generator today
Genmax
10500W Genmax Tri Fuel Open Frame Inverter Generator

Genmax GM9000iET Tri-Fuel Inverter Generator

10500W Genmax Tri Fuel Open Frame Inverter Generator

$1,260.00at WalmartChecked 4 h ago
See all prices and details
Visit Walmart
Pros
  • Inverter output with 3% or less THD protects electronics
  • Remote, Bluetooth and ATS start options
  • Runs on gasoline, propane or natural gas
  • Wheels and 138 lb make it movable by one person
  • Built-in carbon monoxide detector
Cons
  • 7,800W running won't carry a whole house
  • 74 dBA is loud for a campsite
  • Smaller engine limits heavy motor starting
Westinghouse
Westinghouse 28000 Peak Watt Tri-Fuel Home Backup Portable Generator

Westinghouse Tri-Fuel Home Backup Generator

Westinghouse 28000 Peak Watt Tri-Fuel Home Backup Portable Generator

4.7(2,067 ratings)
$1,407.30at CrenvuChecked 4 h ago
See all prices and details
Visit Crenvu
Pros
  • 20,000W running handles whole-home loads
  • 28,000W peak starts large HVAC and well pumps
  • 17.2-gallon tank gives long unattended runtime
  • 999cc engine is built for continuous heavy duty
Cons
  • 557 lb needs a permanent pad or equipment to move
  • 79 dBA is loud
  • Under 5% THD is not ideal for sensitive electronics
  • No remote or Bluetooth start listed

What separates them

Genmax GM9000iET Tri-Fuel Inverter GeneratorWestinghouse Tri-Fuel Home Backup Generator
Running watts (gasoline)7,800W rated20,000W rated
Peak watts (gasoline)10,500W28,000W
Power quality (THD)3% or less, safe for laptops and medical gearUnder 5%, fine for most appliances but not inverter-grade
Weight and mobilityAbout 138 lb with transport wheels557 lb, effectively a fixed installation
Start optionsOne-button, remote, recoil, Bluetooth and ATS auto-startStandard electric/key start
Noise74 dBA79 dBA
Fuel tank and runtime5.8 gal, up to 13.5 hours at 25% load17.2 gal, up to 13 hours at 25% load
Engine size349cc999cc

Price history

$3,899.00$1,399.99
Nov 6Nov 10
  • Genmax GM9000iET Tri-Fuel Inverter Generator: lowest $1,399.99 on Nov 6 at Amazon; $1,739.40 on Nov 10.
  • Westinghouse Tri-Fuel Home Backup Generator: lowest $1,407.30 on Nov 10 at Crenvu.

Prices at every store

Genmax GM9000iET Tri-Fuel Inverter Generator

  • WalmartNew

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

    $1,260.00Free shippingChecked 4 h ago
    Visit Walmart
  • CrenvuNew

    In stock

    $1,739.40Free shippingChecked 4 h ago
    Visit Crenvu
  • FashodreNew

    In stock

    $1,739.40Free shippingChecked 4 h ago
    Visit Fashodre
  • AmazonNew

    Availability unknown

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

    $1,399.99Checked Nov 6
    Visit Amazon
All 11 stores and price history →

Westinghouse Tri-Fuel Home Backup Generator

  • CrenvuNew

    In stock

    $1,407.30Free shippingChecked 4 h ago
    Visit Crenvu
  • WalmartNew

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

    $3,899.00Free shippingChecked 4 h ago
    Visit Walmart
  • The Home DepotNew

    In stock

    $3,899.00Free shippingChecked 4 h ago
    Visit The Home Depot
  • Academy SportsNew

    In stock

    $3,899.00+ $526.32 shippingChecked 4 h ago
    Visit Academy Sports

Also available at

  • eBayCheck price at eBay

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

All 14 stores and price history →

Specs compared

SpecGenmax GM9000iET Tri-Fuel Inverter GeneratorWestinghouse Tri-Fuel Home Backup Generator
colorOrangeBlack
Total Harmonic DistortionTHD ≤3%less than 5% THD
Rated Running Power7800W—
Peak Power10500W—
Fuel Typesgasoline, LPG, and natural gas—
Runtime at 25% Loadup to 13.5 hours—
Product Dimensions27.12"L x 25.27"W x 23.62"H—
Start Optionsone-button start, remote start, and recoil-start—
Noise Level74 dBA—
Fuel Capacity5.8 gallons—
Propane Rated Watts7,000 rated watts—
Natural Gas Rated Watts6,250W—
Show all 23 specsShow fewer specs
SpecGenmax GM9000iET Tri-Fuel Inverter GeneratorWestinghouse Tri-Fuel Home Backup Generator
Peak watts gasoline—28,000 peak watts
Rated watts gasoline—20,000 running watts
Peak watts propane—25,200 peak watts
Rated watts propane—18,000 running watts
Peak watts natural gas—22,400 peak watts
Rated watts natural gas—16,000 running watts
Run time—up to 13 hours at 25% load
Fuel tank capacity—17.2-gallon
Engine displacement—

What reviewers say

Westinghouse Tri-Fuel Home Backup Generator

  • 4.7 / 52,067 ratings

Owners of this class of Westinghouse tri-fuel generator praise the fuel flexibility and the clean under-5% THD output for home backup. Complaints center on weight, noise and the lower wattage on natural gas.

What people mention
  • Fuel flexibilityPraisedOwners value running on propane or natural gas instead of storing gasoline.
  • WeightCriticisedAt 557 lb it is hard to move without equipment.
  • NoiseCriticised79 dBA is loud and noticeable in a neighborhood.
  • Power qualityPraisedUnder 5% THD is cited as safe for sensitive electronics.

Questions and answers

Which is better for running a house during an outage?
The Westinghouse. At 20,000 running watts it can carry central air, a well pump and major appliances together. The Genmax tops out at 7,800 running watts, enough for essentials like a fridge, lights and a furnace fan.
Which is better for an RV or job site?
The Genmax. It weighs about 138 lb, rolls on wheels and has remote and Bluetooth start. The Westinghouse at 557 lb is not something you load into a truck bed regularly.
Is the Genmax safe for laptops and medical devices?
Yes. Its inverter output is rated at 3% or less total harmonic distortion, which is the range electronics makers want. The Westinghouse is under 5%, acceptable for most appliances but not inverter-grade.
Which lasts longer?
Both carry limited warranties, and long-term life depends on load and maintenance. The Westinghouse's 999cc engine is built for sustained heavy loads, while the Genmax's 349cc engine works harder near its limit.
Is the Westinghouse worth stepping up to?
Only if you need whole-home backup and can install it permanently with a transfer switch. For portable power, the Genmax's lower weight, cleaner power and remote start are the better fit.
Do both run on natural gas?
Yes. The Genmax rates 6,250W on natural gas and 7,000W on propane. The Westinghouse rates 16,000W running on natural gas and 18,000W on propane.

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  • Westinghouse iGen8200TFc Tri-Fuel Inverter vs Westinghouse 28000 Peak Watt Tri-Fuel Home Backup Portable Generator

Buying guides that pick them

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999cc
Weight—557 lb.
Operating volume—79 dBA