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WEN

WEN RV-Ready 4000-Watt Open Frame Inverter Generator (GN400iM)

  • Based on 17 reviews
Condition: New
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Availability: In Stock.
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Arrives Wednesday, Sep 24
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Style: 4000W Open Frame


Features

  • Generates clean power to safely operate sensitive electronics such as phones, tablets, TVs, and computers
  • Parallel-ready panel allows you to connect any 2 WEN inverter generators for increased wattage output
  • 212cc 4-stroke engine produces 4,000 surge watts and 3,500 rated watts
  • Lightweight body weighs 30% less than a standard 4000-watt generator
  • Includes two 120V NEMA 5-20R receptacles, two 5V USB ports, one 120V RV-ready TT-30R receptacle, and a two-year warranty

Description

Remember when you had clean and quiet portable power? The WEN® 4,000-watt inverter generator provides clean energy, free of voltage spikes and drops for safe use with laptops, phones, and other sensitive electronics. Designed to mirror a pure sine wave, this generator limits total harmonic distortion to under 0.3 percent at no load and under 1.2 percent at full load, making it safe to run sensitive electronics. Our ultra-efficient 1.85-gallon tank provides over seven hours of half-load run time. Maximize fuel economy by engaging the eco-mode switch. This allows the generator's engine to automatically adjust its fuel consumption as items are plugged into and unplugged from the panel, preventing the unnecessary usage of gasoline. Need more energy? Easily link up two generators using a WEN® Parallel Connection Kit (sold separately) in order to share wattage amongst multiple units. Low- oil and low-fuel automatic shutdown combine with the built-in overload protection and indicator lights to safeguard both your generator and your electronics from damage. And because it's a WEN® product, your open frame inverter generator comes backed by a two-year warranty, a nationwide network of skilled service technicians, and a friendly customer help line, all to make sure you remember WEN®.

Brand: WEN


Wattage: 4000 watts


Fuel Type: Gasoline


Power Source: Fuel Powered


Recommended Uses For Product: Camping, Residential


Voltage: 120 Volts (AC)


Output Wattage: 4000


Special Feature: Lightweight


Included Components: Two 120V NEMA 5-20R receptacles, two 5V USB ports, one 120V RV-ready TT-30R receptacle, and a two-year warranty See more


Color: Orange


Brand: WEN


Wattage: 4000 watts


Fuel Type: Gasoline


Power Source: Fuel Powered


Recommended Uses For Product: Camping, Residential


Voltage: 120 Volts (AC)


Output Wattage: 4000


Special Feature: Lightweight


Included Components: Two 120V NEMA 5-20R receptacles, two 5V USB ports, one 120V RV-ready TT-30R receptacle, and a two-year warranty


Color: Orange


Product Dimensions: 19.8"L x 13.8"W x 18.9"H


Model Name: WEN RV-Ready 4000-Watt Open Frame Inverter Generator


Engine Type: 4 Stroke


Ignition System Type: recoil start


Tank Volume: 1.9 Imperial Gallons


Runtime: 7 hours


Total Power Outlets: 5


Starting Wattage: 4000 Watts


Running Wattage: 4000 Watts


UPC: 044459140016


Manufacturer: WEN


Item Weight: 73.3 pounds


Item model number: GN400iM


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Sep 24

This item is non-returnable:

Non-returnable. Transportation of this item is subject to hazardous materials regulation

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • 4000-Watt open frame
Style: 4000W Open Frame
Works perfectly! I bought this specifically because it has no CO auto-shut-off. As a retired "old-skool" mechanic I'm fully aware of the dangers of carbon-monoxide. I needed a generator that I could use to power either my 8 gallon air compressor or a 110V well pump out at the old farmstead. Of course it's always best to buy more watts than you ever expect needing. I finally got around to putting it to the test today and it can perform the intended tasks easily even in Eco-mode! It's small enough and light enough that I can even put it in the trunk of my car. If moving it a longer distance I can do so with my pneumatic tired two wheel cart. One thing I'd have preferred is a 12 volt outlet rather than the two USB ports but that's not a big deal. Mostly I like the simplicity of the open frame design. I've worked on a few of the fully encased models and find them frustrating! Like I prefer draining the gas out of the carb rather than closing the shut-off and letting the engine starve until it dies. Trust me, that stuttering and surging is NOT good for either the engine or the generator! With this open frame design it's easily done - no muss, no fuss! I'm so impressed with the general build quality that I'll look at more Wen products in the future! ... show more
Reviewed in the United States on February 3, 2025 by JW Wimpy

  • Does the job.
Style: 4000W Open Frame
As a smaller, less expensive inverter generator, this does the job. One reason I bought it is to be able to charge an ECOFLOW power station during an emergency, These power stations are rather finicky about the quality of the sine wave used to charge them in AC mode and this generator produces a sine wave that is pure enough to charge the power station. Obviously it is also intended for use as an emergency backup to run some home essentials during an outage. One suggestion is that I would have paid a little more money for a battery start option. Or, I'd like to see WEN come up with a conversion kit to battery start. ... show more
Reviewed in the United States on February 8, 2025 by D2reu

  • great quality
Style: 4000W Open Frame
Works great, no assembly, pretty light weight so it's easy to carry. Plenty of power for a back up generator.
Reviewed in the United States on November 28, 2024 by By1149

  • One trips use then stopped starting after 6 month storage
Style: 4000W Open Frame
Cannot fathom why this unit will not start with regularity. Cleaned carb and tuned after only about 15 hours of use and 6 months storage with no fuel in it. Got it started again after rebuilding the carb. Started once then a week lllater when I needed it the unit would not start.
Reviewed in the United States on December 2, 2024 by Martin Savage

  • Good generator
Style: 4000W Open Frame
Purchased in 2021, with oil and spark plug changes..still starts on the first pull..it has been a good generator..
Reviewed in the United States on February 18, 2025 by Karnac

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