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Genmax GM4000ISBEPC 4000 Watt Gasoline Inverter Generator with CO Detect

Genmax GM4000ISBEPC 4000 Watt Gasoline Inverter Generator with CO Detect

Best price now

$745.00at FactoryPureObserved at 11:34 AM

Compared across 2 stores. Prices are checked against each store and labelled with when.

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Our take on the Genmax GM4000ISBEPC 4000 Watt Gasoline Inverter Generator with CO Detect

The Genmax GM4000iSBEPC is a 4,000-watt gasoline inverter generator with electric start, a fully enclosed case for quieter running, and built-in carbon monoxide detection. Its LCD control center shows run hours, output voltage and load level, and the inverter output is clean enough for laptops, TVs and tools. Two units can be linked with a series-parallel box to reach 240V and about 6,000 running watts. At $745 at FactoryPure as of November 5, 2026, it sits at the low end of its recent price range.

Best forHome backup for fridges, lights and electronicsCamping and tailgating where noise mattersRV owners who want clean 120V powerOwners planning a two-unit 240V setup
Pros
  • Electric push-button start with included battery
  • Fully enclosed design keeps noise down
  • CO Detect shuts the unit off when carbon monoxide builds up
  • LCD shows hours, voltage and load at a glance
  • Clean inverter power suits sensitive electronics
  • Parallel-ready for a 240V, 6,000W two-unit setup
Cons
  • 240V output needs a second generator and a special series-parallel box, sold separately
  • Gasoline only; no propane or natural gas option
  • Heavy for one person to lift into a truck bed
  • No remote start or wireless monitoring

Genmax GM4000ISBEPC 4000 Watt Gasoline Inverter Generator with CO Detect prices at every store

  • FactoryPureNew

    In stock

    $745.00Free shippingObserved at 11:34 AM
    Visit store
  • generator-superstore.comNew

    In stock

    $789.00Observed at 11:34 AM
    Visit store

Also available at

  • Shop AppliancesCheck price at Shop Appliances
  • HomeryCheck price at Homery
  • FactoryPureCheck price at FactoryPure

Genmax GM4000ISBEPC 4000 Watt Gasoline Inverter Generator with CO Detect price history

Lowest price we've seen: $745.00 on Nov 5 at FactoryPure. Tracked across 2 stores since Nov 5.

From FactoryPure

  • Gasoline electric start inverter generator with CO Detect
  • Fully enclosed design dramatically reduces noise levels
  • Provides clean, stable power ideal for sensitive electronics, tools, and appliances
  • Parallel Ready: use a special series-parallel box to combine 2 generators into a 240V generator
  • Digital Control Center with LCD display showing hours run, voltage output, and load level
  • Magnetic oil dipstick and low oil shut-off
Guarantee
Comes with a 3 year factory warranty; optional extended warranties available for 2, 3, or 5 total years.
Shipping
FREE shipping on all orders; freight shipments include liftgate at no additional charge; ships in an estimated 1-2 business days.
In the box
Inverter Generator, User's Manual, Warranty

About the Genmax GM4000ISBEPC 4000 Watt Gasoline Inverter Generator with CO Detect

GENMAX GM4000iSBEPC 4000 Watt Gasoline Inverter Generator with CO Detect

• EXTREMELY QUIET: Full enclosed design dramatically reduces noise levels.

• ELECTRIC START: The convenient electric push-button start includes a battery.

• 240V READY: (120v+120v=240v,3000w+3000w=6000w,TWO UNITS SERIES CONNECTIONG : 240v 6000W running watts . ) Use special series-parallel box to combine 2 generators convert into 240V generator.

• DIGITAL CONTROL CENTER: The Digital Control Center features an LCD display showing hours run, voltage output, and load level.

• CLEAN ELECTRICITY: Provides clean, stable power ideal for sensitive electronics, tools and appliances.

Questions and answers

Is $745 a good price for the GM4000iSBEPC?
It is the best new price we track, $745 at FactoryPure as of November 5, 2026, and it sits at the low end of its recent range. Two stores list it new, so compare both before buying.
Can it really run 240V appliances?
Not on its own. You need two GM4000iSBEPC units and the special series-parallel box to get 240V at about 6,000 running watts.
How loud is it?
Genmax rates it as extremely quiet thanks to the fully enclosed case, but no decibel figure is published. Expect normal inverter-generator conversation-level noise at moderate loads.
What comes in the box?
The generator, a user's manual and the warranty. The start battery is included with the electric start; the parallel box is not.
Does it have carbon monoxide protection?
Yes. CO Detect monitors carbon monoxide and shuts the generator down when levels get unsafe, which matters if you run it near a garage or open window.
Can I run it on propane?
No. It is a gasoline-only unit, so you will need to store and rotate fuel.
Where is the Genmax GM4000ISBEPC 4000 Watt Gasoline Inverter Generator with CO Detect cheapest?
At FactoryPure, for $745.00, as of our latest check.
Where can I buy the Genmax GM4000ISBEPC 4000 Watt Gasoline Inverter Generator with CO Detect?
4 stores we checked sell it, including FactoryPure, generator-superstore.com, Shop Appliances, Homery.

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