WEN RV-Ready 4000-Watt Open Frame Inverter Generator (GN400i)
WEN RV-Ready 4000-Watt Open Frame Inverter Generator (GN400i)
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WEN RV-Ready 4000-Watt Open Frame Inverter Generator (GN400i)

34 ratings

Key item features

  • Clean Power: Generates clean power, free of voltage spikes and drops, suitable for sensitive electronics like phones, tablets, and computers.
  • Engine Performance: Features a 212cc 4-stroke OHV engine, producing 4000 surge watts and 3500 rated watts.
  • Lightweight Design: Weighs 30% less than a standard 4000-watt generator, enhancing portability.
  • Versatile Outlets: Includes two 120V NEMA 5-20R receptacles, two 5V USB ports, and one 120V RV-ready TT-30R receptacle.
  • Parallel Capability: Parallel-ready panel allows connection of two WEN inverter generators for increased wattage output.
  • Efficient Operation: Eco-mode switch automatically adjusts fuel consumption for maximized fuel economy.
  • Safety Features: Incorporates low-oil and low-fuel automatic shutdown, along with overload protection and indicator lights.
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Specs

Continuous wattage, 3500WFuel type, GasolineRun time, 7 hSurge wattage, 4000WOutlets, 5Brand, WEN

About this item

Product details

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. Our 212cc 4-stroke OHV engine produces up to 4000 surge watts and 3500 rated watts of power. 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 7 hours of half-load run time. The fully-packed panel comes equipped with two three-prong 120V NEMA 5-20R receptacles, two 5V USB ports, and one 120V RV-ready TT-30R receptacle. 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 its 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.
  • Generate clean power to safely operate sensitive electronics such as phones, tablets, televisions and computers
  • Parallel-ready panel allows you to connect any two WEN inverter generators for increased wattage output
  • 212cc 4-stroke OHV engine produces 4000 surge watts and 3500 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
  • Includes two 120V NEMA 5-20R receptacles, two 5V USB ports, one 120V RV-ready TT-30R receptacle, and a two-year warranty.
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Specifications

Continuous wattage

3500W

Fuel type

Gasoline

Run time

7 h

Surge wattage

4000W

Warnings

Customer ratings & reviews

4.3 out of 5 stars
stars
34 ratings23 reviews
Includes global ratings and reviews
How item rating is calculated

Reviews summary

Pros

  • : Offers great value at this cost.
  • : Provides extra power for emergency backup and sensitive electronics.
  • : Directions are easy to follow for start-up and maintenance.
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Showing 1-3 of 23 reviews

Jan 26, 2026
Reviewer name: Stacy
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Awesome generators

Incentivized Review
Helpful?2EB9YHFQUYBK925228040
Sep 21, 2024
Reviewer name: BJ
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Recommend. If

Does very well and a bit more quieter than I anticipated. I ended up getting one for a nieghbor. This works well with UPS devices as expected from an inverter generator. If your at half load or more you will a lot of fuel. At 25 percent I had it last all night. Five stars

Incentivized Review
Helpful?2EB9YHFQUYBK925228040
Oct 11, 2023
Reviewer name: Ohio
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

I have been very happy with this. My first generator. Wanted one around the house for an emergency just in case. Starts easy and works as expected. The build quality is way better than expected. I would like to add that some people think if its an inverter generator, its quiet. This is an open frame inverter generator. Cost much less than an enclosed inverter generator. The trade off is its louder. A generator being in an enclosed frame is what makes it quiet. Not because its an inverter. You buy an inverter generator because you want a generator that protects sensitive electronics. You buy an enclosed frame inverter because you want to protect sensitive electronics AND be quiet. Again this is the louder open frame type.

Helpful?2EB9YHFQUYBK925228040
Current price is $463.41
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