Sponsored

Add to your order

  • Coverage for accidental damage including drops, spills, and broken parts, as well as breakdowns (plans vary)
  • 24/7 support when you need it
  • Quick, easy, and frustration-free claims
Cover this product:
4-Year Protection Plan $63.99
Cover all of your eligible devices:
Complete Protect: One plan covers all eligible past and future purchases (Best Value) $16.99/month

Add to your order

  • Coverage for accidental damage including drops, spills, and broken parts, as well as breakdowns (plans vary)
  • 24/7 support when you need it
  • Quick, easy, and frustration-free claims
Cover this product:

Product Protection by Asurion, LLC

  • No Additional Cost: You pay nothing for repairs – parts, labor, and shipping included.
  • Coverage: Plan starts on the date of purchase. Drops, spills and cracked screens due to normal use covered for portable products and power surges covered from day one. Malfunctions covered after the manufacturer's warranty.
  • Easy Claims Process: File a claim anytime online or by phone. Most claims approved within minutes. If we can’t repair it, we’ll send you an Amazon e-gift card for the purchase price of your covered product or replace it.
  • Product Eligibility: Plan must be purchased with a product or within 30 days of the product purchase. Pre-existing conditions are not covered.
  • Terms & Details: More information about this protection plan is available within the “Product guides and documents” section. Simply click “User Guide” for more info. Terms & Conditions will be available in Your Orders on Amazon. Asurion will also email your plan confirmation with Terms & Conditions to the address associated with your Amazon account within 24 hours of purchase.

Product Protection by Asurion, LLC

  • BEST VALUE: Protect all your eligible Amazon purchases including: tech, tools, appliances, furniture and more. All for one low monthly price.
  • PAST AND FUTURE PROTECTION: Covers malfunctions and failures, plus drops or spills for eligible portable items. Protection begins immediately for eligible purchases from the past 90 days, plus all eligible future purchases (products used commercially are excluded).
  • TRUSTED CYBERSECURITY: Digital security with scam detection for emails and texts.
  • EASY CLAIMS: File in minutes at www.asurion.com/amazon for fast repair or reimbursement - up to the purchase price.
  • NO HIDDEN FEES. CANCEL ANYTIME: Up to $5,000 in total claims per 12-month period. Your plan renews monthly until canceled (coupons applied at checkout don’t renew monthly).

Product Protection by Asurion, LLC

Please ensure you are not covered by existing insurance
  • No Additional Cost: You pay nothing for repairs – parts, labor, and shipping included.
  • Coverage: Plan starts on the date of purchase. Drops, spills and cracked screens due to normal use covered for portable products and power surges covered from day one. Malfunctions covered after the manufacturer's warranty.
  • Easy Claims Process: File a claim anytime online or by phone. Most claims approved within minutes. If we can’t repair it, we’ll send you an Amazon e-gift card for the purchase price of your covered product or replace it.
  • Product Eligibility: Plan must be purchased with a product or within 30 days of the product purchase. Pre-existing conditions are not covered.
  • Terms & Details: More information about this protection plan is available within the “Product guides and documents” section. Simply click “User Guide” for more info. Terms & Conditions will be available in Your Orders on Amazon. Asurion will also email your plan confirmation with Terms & Conditions to the address associated with your Amazon account within 24 hours of purchase.
Cover this product:
4-Year Protection Plan
$63.99
Complete Protect: One plan covers all eligible past and future purchases (Best Value)
$16.99/month
$374.99
Shipper / Seller
Amazon.com
Amazon.com
Shipper / Seller
Amazon.com
Returns
Non-returnable. Transportation of this item is subject to hazardous materials regulation
Non-returnable. Transportation of this item is subject to hazardous materials regulation
This item is non-returnable because of transportation regulation, but if the item arrives damaged or defective, you may request a refund or replacement through Your Orders by providing an image of the item and its defects.
See return policy
Payment
Secure transaction
Your transaction is secure
We work hard to protect your security and privacy. Our payment security system encrypts your information during transmission. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others. Learn more
Support
Product support included
What's Product Support?
In the event your product doesn't work as expected or you need help using it, Amazon offers free product support options such as live phone/chat with an Amazon associate, manufacturer contact information, step-by-step troubleshooting guides, and help videos. By solving product issues, we help the planet by extending the life of products. Availability of support options differ by product and country. Learn more
Gift options
Available at checkout
Available at checkout This item is a gift. Change
At checkout, you can add a custom message, a gift receipt for easy returns and have the item gift-wrapped
Include
Add a protection plan:
Sorry, your monthly warranty plan was removed because these plans are currently only available for single-item orders.
Add to your order

4-Year Home Improvement Protection Plan

from Asurion, LLC
$63.99
  • No Additional Cost: You pay nothing for repairs – parts, labor, and shipping included.
  • Coverage: Plan starts on the date of purchase. Drops, spills and cracked screens due to normal use covered for portable products and power surges covered from day one. Malfunctions covered after the manufacturer's warranty.
  • Easy Claims Process: File a claim anytime online or by phone. Most claims approved within minutes. If we can’t repair it, we’ll send you an Amazon e-gift card for the purchase price of your covered product or replace it.
  • Product Eligibility: Plan must be purchased with a product or within 30 days of the product purchase. Pre-existing conditions are not covered.
  • Terms & Details: More information about this protection plan is available within the “Product guides and documents” section. Simply click “User Guide” for more info. Terms & Conditions will be available in Your Orders on Amazon. Asurion will also email your plan confirmation with Terms & Conditions to the address associated with your Amazon account within 24 hours of purchase.

Complete Protect: One simple plan covers all eligible past & future Amazon Purchases

from Asurion, LLC
$16.99/month
  • BEST VALUE: Protect all your eligible Amazon purchases including: tech, tools, appliances, furniture and more. All for one low monthly price.
  • PAST AND FUTURE PROTECTION: Covers malfunctions and failures, plus drops or spills for eligible portable items. Protection begins immediately for eligible purchases from the past 90 days, plus all eligible future purchases (products used commercially are excluded).
  • TRUSTED CYBERSECURITY: Digital security with scam detection for emails and texts.
  • EASY CLAIMS: File in minutes at www.asurion.com/amazon for fast repair or reimbursement - up to the purchase price.
  • NO HIDDEN FEES. CANCEL ANYTIME: Up to $5,000 in total claims per 12-month period. Your plan renews monthly until canceled (coupons applied at checkout don’t renew monthly).
Added to

Sorry, there was a problem.

There was an error retrieving your Wish Lists. Please try again.

Sorry, there was a problem.

List unavailable.
Sponsored
  • WEN RV-Ready 4000-Watt Open Frame Inverter Generator (GN400iM)

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

4.4 out of 5 stars (3,420)
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice

$374.99
Get $10 off instantly: Pay $364.99 $374.99 upon approval for the Amazon Store Card. No annual fee.
Ships from
Amazon.com
  • You will be able to track your Amazon order from point of shipping to your doorstep in your orders. If you need more help with tracking your package, please visit Track Your Package.
  • Learn more
Non-returnable. Transportation of this item is subject to hazardous materials regulation
  • This item is non-returnable because of transportation regulation, but if the item arrives damaged or defective, you may request a refund or replacement through Your Orders by providing an image of the item and its defects.
Read full return policy
Customer Support
Fixing things is quick & easy.

Our specialist Customer Support for large items dispatched from Amazon is on hand to help with your order. Contact us via phone or chat 7 days a week.

Purchase options and add-ons

About this item

  • 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
Sponsored

Frequently bought together

This item: WEN RV-Ready 4000-Watt Open Frame Inverter Generator (GN400iM)
$374.99
Ships from and sold by Amazon.com.
Total price: $00
To see our price, add these items to your cart.
Details
Added to Cart
Choose items to buy together.

Product information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

Feedback

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


Found a lower price? Let us know. Although we can't match every price reported, we'll use your feedback to ensure that our prices remain competitive.

Where did you see a lower price?

Price Availability
/
/
/
/
Please sign in to provide feedback.

From the manufacturer

WEN CELEBRATING 75 YEARS

Remember WEN?

We've been designing and distributing high-quality and affordable power tools for decades. Founded by Nick Anton back in 1951, WEN originally made its mark by helping bring tools and electricity together (putting the power into power tools). Our research and development team played a vital role in helping to develop a variety of common everyday tools such as the chainsaw, the electric soldering gun, the electric jigsaw, the electric engraver, and the knife and wet wheel sharpeners. WEN even pioneered random orbital technology – the technology seen in most polishers, waxers, and buffers today that gives cars everywhere the streak-free shine they deserve.

Helping you get the job done since 1951.
WEN

Since then, our expertise has expanded to encompass a wide variety of products, including drill presses, lathes, bench grinders, nailers, miter saws, hand tools, generators, and cordless power tools, to name a few. By 2001, only 50 years after our humble beginnings, we had already sold over 50 million consumer units. By 2021, we had sold nearly 80 million. Today, WEN's headquarters can be found in West Dundee, Illinois. Our goal is to help woodworkers, DIYers, and artisans across the world execute their wildest imaginations.

WEN Woodworking

Woodworking

Since 1951, WEN has been helping woodworkers complete projects of all shapes and sizes with our extensive line of benchtop, handheld, and floorstanding woodworking tools.

WEN Generators

Generators

Whether you're on the job, at home, or out camping, let power be one less thing you have to worry about. Our vast line of inverter, dual fuel, and traditional gas-powered generators means we have the exact wattage and feature combination for any application.

WEN 20V Battery System

20V Battery System

Power your life with the WEN 20V Max Battery System. Any of our 20V batteries are cross-compatible with all of the products in our always-expanding line of WEN 20V handheld tools.

WEN Lawn & Garden

Lawn and Garden

We don't just stop at helping you in the shop. Let WEN take the work out of yard work. From pressure washers, to maintenance equipment, to log splitters, WEN has you covered for every season of the year.

Always expanding. Always innovating.

Product 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®.

Top Brand: WEN

Highly Rated
100K+ customers rate items from this brand highly
Trending
100K+ orders for this brand in past 3 months
Low Returns
Customers usually keep items from this brand
Sponsored

Customer reviews

4.4 out of 5 stars
3,420 global ratings
Sponsored

Customers say

Customers find the generator reliable, with the electric start working flawlessly and startinging right up within 2 seconds. They appreciate its top-tier craftsmanship and consider it a good investment for the price. The generator is easy to use with a push-button start, and customers find it fairly easy to assemble, with one noting it comes with all required tools. While some customers find it surprisingly quiet compared to other generators, others consider it a bit loud. Customers report durability issues, with multiple units arriving damaged with broken carburetor pieces.
AI Generated from the text of customer reviews

Select to learn more

398 customers mention reliability, 303 positive, 95 negative
Customers find the generator reliable, with the electric start working flawlessly and running like a champ. One customer mentions it performed well during power outages.
Great price and works great. Got this for hurricane Matthew and it power my whole house. It came with oil and tools to put on the wheels and handles.Read more
...It started right up, runs great, and will go forever on a tank of gas. It runs several things in the house during power outages.Read more
...Overall, this generator is reliable, efficient, and has given me peace of mind knowing that I have a backup power source whenever I need it.Read more
Electric start doesn't work after manufacturer recommendation of letting it operate for several hours to charge the battery....Read more
250 customers mention quality, 237 positive, 13 negative
Customers praise the generator's quality, describing it as a top-tier piece of machinery.
Great generator. Well built. I am really impressed coming off buying a name brand that wouldn’t work to this I was skeptic but this has been solid....Read more
Great product absolutely nothing compares to it. Started up on the first touch of the electric start. Awesome, awesome and fantastic....Read more
...Funnel and oil included. Very thoughtful of wen its a good generator and the price is great.. My only complaint is the noise it gives me such bad...Read more
Good Product. Took quite awhile to put it together. Would not start to begin with but finally found the ground wire disconnected from the battery....Read more
190 customers mention value for money, 176 positive, 14 negative
Customers find the generator offers good value for money, describing it as one of the best investments of the year and a less expensive inverter option.
Great price and works great. Got this for hurricane Matthew and it power my whole house. It came with oil and tools to put on the wheels and handles.Read more
So far so good. Good 1st impression. Great value. All the bells and whistles I was looking for at a good price....Read more
Great product and a good price. The assembly was straightforward with clear instructions, and took only 15 minutes. Very economical to operate....Read more
...However, I believe as a home backup it is well worth the money.Read more
176 customers mention starting time, 165 positive, 11 negative
Customers appreciate how quickly the generator starts, noting it fires up within 2 seconds and is easy to operate with its electric start feature.
...was easy to assemble, (legs, wheels and handles are included) it started right up, ran all day on one tank of gas and provided plenty of power for...Read more
...-Watt Dual Fuel Portable Generator is truly impressive with its electric start and CO Watchdog features, offering reliable power for various needs....Read more
...Added oil, gas, bumped the starter for literally one second-fired right up, running smooth! Plugged in multiple appliances--no sag at all....Read more
...generator goes down and I have been favorably impressed it starts right up and while not as quiet or as fuel efficient as my inverter generator it...Read more
160 customers mention ease of assembly, 150 positive, 10 negative
Customers find the generator easy to assemble, with clear instructions and fast setup, and one customer notes that all necessary tools are included.
...This generator was easy to assemble, (legs, wheels and handles are included) it started right up, ran all day on one tank of gas and provided plenty...Read more
...Easy pull start Wheel and handle Kit Easy assembly Easy dipstick and drain access 3yr warranty Cons:...Read more
Easy to put together. After following setup instructions, it fired right up. Looks good and runs good.Read more
...provided all the tools to attached the feet and handles, and the assembly was easy. The instructions said that the battery needed to be attached....Read more
132 customers mention ease of use, 118 positive, 14 negative
Customers find the generator easy to use, particularly appreciating its electric start feature and push-button operation.
Works great. Looks great. Easy to use. Mine came with the vibration absorber mount cracked. I notice that when unpacking during my trip....Read more
...Amazon replaced it...the replacement is perfect...easy to assemble...easy start...low noise compared to the one I had from 2011....Read more
Have used during 4 power outages. Easy to start and has saved me it's cost already just because I haven't lost freezers and refrigerators full of...Read more
...Putting it together is simple and easy. I have yet to use it but I really like the look and how easily it started right up. A good purchase!Read more
169 customers mention noise level, 101 positive, 68 negative
Customers have mixed opinions about the generator's noise level, with some finding it surprisingly quiet compared to others, while others describe it as a bit loud.
...adapter to connect it to my house but the unit works so well and is quiet compared to the previous one we had.Read more
...My only complaint is the noise. You probably don't won't to work within 30 feet of it for very long. I'd rate it a 5 if it was a bit quieter....Read more
...The noise level (one of my major concerns) is far lower than I thought, and starting the generator is very easy due to the electric start....Read more
...Biggest complaint is that it is loud. And really annoying that it doesn’t run smoothly. Make sure to turn the fuel line off when storing it....Read more
102 customers mention durability, 21 positive, 81 negative
Customers report durability issues with the generator, including damaged units and broken carburetor pieces.
I have received a damaged generator, dented and brokenRead more
...Better unbox that thing and get it running. Broken motor mount. DARN IT. Guess I will have to do without football....Read more
I purchased and returned this product twice due broken motor mounts out the box. On both occasions the box looked abused on delivery....Read more
Very well made and sturdy. Not disappointed at all with this purchase....Read more
So far *chef"s kiss*
5 out of 5 stars
So far *chef"s kiss*
Arrived over a day early (thank you so much) and my 23 yo daughter and myself (51 yo woman) just turned one of the window ac units to fan FROM ac. Got chilly...only about 4 hours after delivery, set up and a run to buy gas and go to Home Depot where all of the multi outlet cords were gone :/ In Houston without power since Monday. MONDAY. I should've bought one sooner but was intimidated. Shouldn't have been. Seems very loud but it's my first one. May check out adding a propane one in case gas is hard to come by again...like earlier this week. Will come back if I have to whine or ask any questions okay? Previous commenters helped me go with this one. After a very hot 5.5 days, this costing around $400 feels like a steal. Currently running 2 window ac units and a power strip with 2 monitors, a gaming pc, and we're charging our devices off of it. Plan on adding a dorm size fridge when a capable cord comes in. Fingers crossed. We'll be ready with confident generator usage this hurricane season. AS LONG AS I CAN GET GAS! Picture is something the manual didn't mention in the starting instructions. A neighbor I asked to crank it up told me. This lever needs to be in this position to start. GOT IT? Good, very good. Edit: one tank lasted 14 hours running both window units and the power strip (plus internet). Checked the oil, all good. It was an easy gas refill, the auto start didn't work but pulled the handle once and it fired right up (like when the neighbor did it). So pleased, life isn't miserable now!
Thank you for your feedback
Sorry, there was an error
Sorry we couldn't load the review

Top reviews from the United States

  • 5 out of 5 stars
    Affordable and Reliable Power!!!
    Reviewed in the United States on July 21, 2025
    Brief content visible, double tap to read full content.
    Full content visible, double tap to read brief content.

    I purchased this generator specifically for emergency situations and it's exceeded my expectations. My goal was to find something affordable yet powerful enough to run two electric heaters in the winter or a portable A/C unit in the summer—and still have juice left for essentials like a lamp, phone chargers, and our modem/router. This unit handles all of that with ease.

    It may not have the extra bells and whistles found in higher-end inverter models, but I didn’t need those. What I wanted was reliability and simplicity, and this generator delivers. It starts with one pull and hums along at a reasonable volume (around 50 decibels from 25 feet away), which is perfectly in line with similar units.

    One standout feature is the eco mode, which adjusts the engine speed based on the power demand—saving fuel and reducing noise when the load is light. I also really appreciate the open-frame design—it makes it super easy to drain the carburetor after use, a huge convenience.

    Unlike some models, this generator doesn't have a carbon monoxide shutdown sensor. Personally, I prefer it that way. I’m very aware of the safety rules when operating a generator and never run it indoors or in confined spaces. Without the auto-shutdown, I don’t have to worry about wind triggering unnecessary shut-offs.

    It is a bit heavier than I anticipated, so I picked up a folding hand truck and now it's fully mobile—problem solved. It comes with a standard two-year manufacturer warranty, and I opted for the extended protection plan, giving me four years of peace of mind.

    Overall, I’m extremely satisfied with this purchase. It gives me confidence that we'll have power in any situation.

    48 people found this helpful
    Sending feedback...
    Thank you for your feedback.
    Sending feedback...
    Thanks, we'll investigate in the next few days.
  • 5 out of 5 stars
    One of the best values for a generator out there
    Reviewed in the United States on June 17, 2025
    Brief content visible, double tap to read full content.
    Full content visible, double tap to read brief content.

    This has to be the best value for a workhorse generator! And I mean workhorse! It spent all last summer being my power source, like it ran 24/7 for over 8 months straight, only getting breaks to change the oil, add oil, refill with gas, and clean the air filter. There are several models of this generator, some of them include the CO sensor, some are dual fuel capable, some have electric start and some are pull start only. This one is electric start with the CO sensor and only runs on gasoline. When I got it I was surprised to learn just how small this generator is compared to others with the same rough output. Set up was super easy and required only a few tools (which they included) to set it up, it comes with EXACTLY how much oil you need to break it in, the electric start works flawlessly, but for the first run I wanted to know how easy this would pull start and it started on the first pull! Just follow the instruction manual to a tee for maintenance and you will get a heck of a value for one killer generator!

    When the expected happened and I killed the motor burning it up in the Arizona heat at around the 6000 running hours mark, I called wen customer service to ask to purchase another motor since everything else about the generator worked just fine, and they did the unexpected! They pressured me into them sending me a whole new unit free of charge! They said it should last at least through the warranty period, and since it didn't they were sending me a new unit! AMAZING CUSTOMER SERVICE FROM WEN!!! Night and day customer service from Generac to WEN! This instills utter confidence in my purchase of a generator or really anything from this company.

    Also worthy of note, when changing the oil it requires EXACTLY 16.9 FL OZ of oil in the crankcase, so I was able to re-use some of my empty disposable drinking water bottles (after letting them dry of course) to measure out exactly how much oil it needed every oil change. Also the owners manual says to change the oil every 50 hours of runtime, but WEN customer service said to change it every 24 running hours, so I have been following those recommendations with the replacement unit and it seems to be lasting a lot longer than the first one, I'm also not using it as much anymore since I got my solar system active (3-4 hours 5ish days a week to top up the solar system batteries before I go to bed.)

    104 people found this helpful
    Sending feedback...
    Thank you for your feedback.
    Sending feedback...
    Thanks, we'll investigate in the next few days.
  • 5 out of 5 stars
    Good investment!
    Reviewed in the United States on November 19, 2025
    Brief content visible, double tap to read full content.
    Full content visible, double tap to read brief content.

    A little workhorse. Have had it about week and it has performed great. Able to run a demolition hammer and a shop vac at the same time. After watching the delivery person not be so careful with which end is up decided to remove the shipping plate and let set overnight. Simple direction. Added premium gas and it started right up. Blue smoke for a bit as it first ran but that went away. Runs at about 82db. Electric start is a major benefit!! Only issue was the drain screw on the fuel cup needed to be tightened. So far a great unit at a great price!

    Good investment!
    5 out of 5 stars
    Good investment!
    Reviewed in the United States on November 19, 2025

    A little workhorse. Have had it about week and it has performed great. Able to run a demolition hammer and a shop vac at the same time. After watching the delivery person not be so careful with which end is up decided to remove the shipping plate and let set overnight. Simple direction. Added premium gas and it started right up. Blue smoke for a bit as it first ran but that went away. Runs at about 82db. Electric start is a major benefit!! Only issue was the drain screw on the fuel cup needed to be tightened. So far a great unit at a great price!

    19 people found this helpful
    Sending feedback...
    Thank you for your feedback.
    Sending feedback...
    Thanks, we'll investigate in the next few days.
  • 4 out of 5 stars
    Overall well built but has a few drawbacks to me
    Reviewed in the United States on May 18, 2025
    Brief content visible, double tap to read full content.
    Full content visible, double tap to read brief content.

    Overall it's a good generator. There's a few nueance things that are a little frustrating with it but not deal breaking or things you can't work around.

    It was easy to assemble and the instructions are generally easy to understand if your mechanically inclined. It's easy to put the handles on the wrong sides or forget to put the loops on for the pins. But again easy to fix that with the handles being 1 bolt and a pin.

    I have the electric ignition one (it was somehow listed at the same price as the pull start only) and it has the pull start as a backup. I haven't used the pull start so I can't say how well that works as of yet. The ignition works like a dream. The only downside to me, and again this is strictly personal preference, is it's a rocker switch. I would personally like a push button. But it starts almost immediately as soon as you rock the switch down.

    There were 2 things that kept me from making this a 5 star review of the generator. The 1st being the fine threads on the oil dipstick no matter what, wants to try and cross thread or go in offset. And if it does DO NOT, and I can't stress this enough, keep trying to tighten it. It's a plastic dipstick, it will cross thread easily. Instead keep struggling to find it's perfect spot and it will line up. There's no way to see if there is any lines to line up unless your laying on the ground or floor of your shop. The only other option is to have someone else help you lift it onto a table.

    The 2nd thing is that holding the rocker switch to off on the panel will not shut it off. Instead you have to grab the rpm handles below that and pull it all the way to the left or reach around and turn the gas off. I'm assuming the off on the rocker panel is for the power out of the outlets. Which should have a switch obviously. But it should have an off switch to turn the motor itself off outside of using the shutoff or rpm control.

    The fail safes do appear to work. Running it full blast with just a battery charger will make it shut off with a fault, as it should since it's sending a ton of power into 1 outlet.

    The noise level isn't terrible, I've heard way louder generators in my time. If I had to compare it to anything it's around the same level as a push gas lawn mower. Maybe a few db lower than a mower. So if your just starting it up and leaving it run while your not near it then you'll be fine. If your on a job site working near it most of the time I would suggest ear protection just because of the prolonged sound.

    67 people found this helpful
    Sending feedback...
    Thank you for your feedback.
    Sending feedback...
    Thanks, we'll investigate in the next few days.
  • 5 out of 5 stars
    Good price for what you get.
    Reviewed in the United States on February 10, 2026
    Brief content visible, double tap to read full content.
    Full content visible, double tap to read brief content.

    So far so good. Just got it. It took about 1/2 hour from receiving the box to running on propane. Assembly was easy with included tools, added my own oil, the funnel is included. Started right up. breaking in now with about 10000 watt load. For a consumer grade generator it is well made. Keep in mind this is not an inverter so it is heavy and about as loud as a lawnmower. will be useing for power tools and a 160 amp smaw welder on friends property.

    Will come back and edit if any issues.

    5 people found this helpful
    Sending feedback...
    Thank you for your feedback.
    Sending feedback...
    Thanks, we'll investigate in the next few days.
  • 5 out of 5 stars
    2 years is still running strong
    Reviewed in the United States on May 22, 2026
    Brief content visible, double tap to read full content.
    Full content visible, double tap to read brief content.

    Been using this generator now for 2 years I live in the mountains of Tennessee so our power goes out quite regularly and I use this as a backup power for my refrigerators and freezers.

    This is a really nice portable little generator it's easy to move around. It will run about 8 hours on 4 gallons of gas it's quieter than my home light 5000 w generator. I ran it for 3 weeks straight during hurricane Helene, I have about 2,400 hours on this generator and it's still going strong.I would definitely recommend this little wen portable generator.

    2 people found this helpful
    Sending feedback...
    Thank you for your feedback.
    Sending feedback...
    Thanks, we'll investigate in the next few days.
  • 1 out of 5 stars
    WORST PURCHASE EVER DO NOT BUY THIS
    Reviewed in the United States on August 6, 2025
    Brief content visible, double tap to read full content.
    Full content visible, double tap to read brief content.

    man such an all around disappoint. first off just like dozens other reviews mentioned mine also arrived with some pretty bad damage literally requiring me to spend roughly the first 3-5 hours of owning it taking it partially apart and literally welding parts of the frame.Then when putting the handle/wheels on i noticed i was missing both a nut and even worse one of the pins for the wheel, which ended up costing me half my day and probably at least 40-50$ total just in fuel then buying the parts. now these are the minor issues if you can believe it! their just is simply no way possible this thing is putting out anywhere near the advertised wattage conidering the only real thing ive even used it on so far was simply on my tiny little 110v welder which mind you i literally use with my 2400w all electric power station without a single issue but yet this unit which is supposed to be nearly 3x that amount of power simply seemed to struggle as when i just simply would just welding a little it would sound like it was it about to explode which genuinely makes no sense. I mean, I should say it does power the welder but my Lord, you can basically hear it start to kick in and out the idle like it’s struggling very much and then on top of that I had to use half a day and nearly a half a roll of welding wire and luckily, I had enough scrap metal laying around to essentially finagle the whole thing together and sturdy and then once I finally got it stable oil in it and I was running it to power a small little travel trailer, which I’ve powered with a 3500 W generator before so this thing should add no problem and that’s when I discovered if you got a model with the CO sensor shut off well just know that that thing is so sensitive that basically if you drive by the generator while it’s running, the air will blow and instantly shut it off which obviously I’m glad I was testing it out during the day because I sure would’ve hate to have woken up in the middle of the night with no power but basically between 4 PM and about 8 PM the generator had shut itself off seven times and mind you I just bought multiple acres of land in the middle of the desert where I have the generator sitting nearly 30 feet away from the travel trailer not a single other thing around it My only assumption is whenever there’s a gust of wind. It must blow the CO just enough into the sensor to shut it down which in my mind this is way too sensitive at this point I was already exhausted as I spent the entire day working on it so I initially I had some plywood laying around, so I tried basically setting that kind of around it to block the wind went inside 20 minutes later it just dies. And well, that’s when I started looking online if I could find any diagrams or how to bypass it because let’s all be honest here. I don’t think very many people are that clueless. They’re just gonna fire this thing up inside their living room or something and personally, even if I was mounting it like in a cubby in my motorhome or something I would much rather prefer to use external CO sensors, like on my previous rig, I had to set up where I had a small generator that I could slide out kind of like a drawer, and I simply mounted a aftermarket CO sensor inside the cubby that wirelessly transmitted info/data to a small screen inside where I could essentially keep an eye on it, and I even as a secondary precaution, use a second sensor inside the motorhome plugged into an outlet closest to where the generator was at underneath where this one would simply flash and beep essentially just like a fire detector. Needless to say I’m no doctor, but I can guarantee you I would not have gotten any type of poisoning with this generator 30 feet away for my trailer outside while I’m inside and at this point I was about to just take it to the dump until I googled how to bypass it and there’s lots of videos about this for other brands but I literally just found it one video of a guy bypassing his on a Wen generator as well, but not even near the same model and so 11 o’clock at night in pitch black I unscrewed the whole front plate. Praying the colors of the wires were the same as the video I saw and sure enough they were and so there’s a black and a white wire that you need to essentially cut and wire together, and this will bypass the co shutdown. I mean, I’m all for safety, but I see no reason for it to be so sensitive. It shuts the whole generator down in the middle of the desert with nothing around, so bottom line is I essentially spent basically two full days having to go buy stuff and work on this generator just to make it function and then I found out after using it for about two weeks that I made a major mistake and this is the biggest reason I recommend everybody avoid this at all costs, unless maybe you’re buying it to use once or twice a year for emergencies because I’ve had dozens of generators in the past and of course prefer the new inverter style one, but I have a decent size battery bank and solar set up and I figured no reason to buy an expensive generator and noise isn’t really an issue for me but the one thing I didn’t take into consideration, even though buying this versus like the inverter model of it saves you about $250-$300. If you use this generator fairly often, you are going to easily spend that much more just in fuel in three months or less I promise you and that simply because like most people you’re not always using the generator to the max, but it essentially runs the max so basically if I’m just using it to power a lightbulb or an entire house, it runs exactly the same and this thing is a propane and gas hog. It literally costs a fortune to run. I mean there’s been times where I simply needed to run it to hook up my battery charger to charge up my battery bank because there wasn’t enough solar that day, and it uses as much fuel as if it was plugged into my trailer with every single thing on when inverter style ones essentially idle down and up for when less or more power is needed, which this I suppose might’ve been a mistake on my part but regardless in my opinion, I’ve had other generators in the past that also weren’t inverter style and were way more efficient so just be prepared to have a lot of propane or gas even with a huge almost 7 gallon gas tank. You’re lucky to get 12 to 16 hours out of it and honestly initially, I wasn’t even going to use gas at all as I prefer just using propane but once I got it all good and used it for the first time I hooked up 230 pound propane tanks with a splitter and was blown away that both tanks were empty around dinner time when I started it probably at 10 in the morning so unless you need a generator where you’re gonna be using the full power output every single time I cannot stress enough please do not buy this thing not to mention the hundred of other reasons if it was returnable, I would’ve returned it instantly and honestly probably went with a different brand but even if you want to stick with this brand, you can get there 6800 lot inverter model for about $300 more which trust me you’ll save that much in 2 to 4 months easily depending on your usage, not to mention much quieter and efficient output so now I’m so upset because I’m probably just gonna have to sell this locally where I’ll be probably be lucky to get $300-$350 and then purchase a different one so all in all I spent nearly 3 days of my time and probably roughly $50 in miscellaneous materials, just even getting this thing usable and a few weeks I did use it probably spent over $100 between propane and gas so in the end, I went with a different inverter brand style one which was 829 but in all reality practically cost me well over $1300 due to all the money I put in to getting this thing working and usable all the fuel I wasted, and then of course, resale value is never as high as new price. And with my new one with those same two propane tanks, it literally easily runs a full 24 hours which again I guess this is partially my own fault, but I still think this thing is very inefficient fuel wise, but regardless of that, as I already mentioned bothers a dozen other reasons not to get it in my opinion, I guess it would be probably a good generator for somebody looking just to have an emergency backup for their house. They might use 2 to 3 times a year but personally, even then you’re already spending over $500. What’s the difference spending 800 for such a better generator and it just really bugs me that these aren’t returnable on Amazon when they say it’s a safety hazard, but that’s very strange considering multiple other websites that sell generators have no problem doing returns. To save yourself the trouble and headache I went through and by yourself virtually any other generator besides this thing not to mention customer service with zero help I mean, I would’ve honestly been more than happy to even give it a three or four star review if they would’ve responded and maybe worked with me Whether they allowed me to return it since it arrived damaged or at the very least offered like a partial refund or something specially considering I’m guessing the majority of people aren’t handy like I am and have the correct tools to weld rewire and do things meaning I bet 80% of the people ordering these if they would’ve gotten the same one I did would’ve had a paperweight with no help personally I wouldn’t even buy this thing for $200 considering just the cost of using it is sky high. I could honestly go on and on about the negatives of this thing and truly I can’t even think of any positives at all I truly could handle anywhere near the advertised 6800 W I could maybe understand it would be a decent generator for 500 bucks to some people but in my opinion, it can truly only handle maybe 4 to 5000 W at least safely and without damaging the generator, I mean a generator this size shouldn’t even hesitate when plugging in say nothing more than a 30 amp battery charger and a small 5000 BTU window air conditioner, but doing that literally made the generator sound like it was a max RPM even surge on occasion and I truly believe that just even using it with these two items which are maybe even on the high side, pulling 2500 W it would probably blow up after 12 hours of use or best case scenario it certainly is going to have a short life because bottom line it’s still just a gasoline engine and no engine is meant to basically red line 24 seven it would basically be like driving your car at 60 miles an hour and first gear everywhere you go and honestly, this is such a disappointment because I’ve owned a couple other generators from this company a few years back and not only were the generators. Much better built Customer service was exceptional and how do you even got extra accessories like the oil included and other things and now seems like the quality is tanked you barely get anything and customer service is pretty much nonexistent seems like unfortunately once they got bigger and more popular they realize they could keep selling generators solely on their name instead of the quality of their product and service. I mean literally I exchanged a few emails with them and just gave up because I was honestly either talking to AI or someone who had no clue about anything like for example I would email and ask about the CO monitor and would literally get a reply basically saying things like oh do you have enough oil in it is the gas turned on I mean, never got any direct answers to my direct questions which is also why I ended up going with a different brand because I was highly considering buying the 6800 W inverter model they sell for about $800 but in my opinion, customer service is 50% of any product you bun. hould have known for the price and also listened to other reviews, which is the biggest indicator this thing is garbage because no matter what you’re buying it’s always gonna have some bad reviews but the way I go by his if you see multiple bad reviews mentioning the same things that typically means it’s spot on and I’m guessing probably 70% of the five star reviews or people who bought it, threw some oil and gas in it ran it for a minute and then stored it in the corner of their garage and also of course must’ve gotten lucky with a decent delivery which clearly if they were a decent company, I mean there’s dozens and dozens of reviews just on this particular model where the generator arrived broken in so many different ways where any decent company would immediately either contact whoever they use the ship and have a big meeting about it or something to get it straightened out or simply use a different shipper because the damage rate is just way too high. I fully understand it does happen no matter what you buy on things, but I order so much stuff that’s more fragile and even bigger than this and almost never have a problem. I would’ve honestly gladly even paid an extra $25 or something if it guaranteed it arrived undamaged that way they could take that $25 and maybe package it better or use a company that might cost a little bit more but I guess since they know there’s virtually nothing we can do since it’s unreturnable and they don’t even respond they don’t even care. id highly recommend looking elsewhere for literally any other generator and I rarely leave reviews like this but seems like you have about 25 to 35% chance of maybe receiving a intact and good running generator which means there’s a 70% chance you’re gonna receive a damaged one, not to mention the million other issues and at least to me I’m not gonna gamble $500 with such low odds of receiving a functioning unit not damaged. Just trust me when I say even if you can’t possibly maybe afford to spend a few hundred dollars on a different model right now you are so much better off just saving your money and until you can because there’s a high probability you’ll end up like me spending nearly $1400 on a generator that only cost 800 and between repairing the initial one and then having to sell it buy a new one wait for it. It was well over a month ordeal. And this is the main reason I decided to leave this long review because I much rather would’ve spent an extra $300 off the bat had a great running generator right away and the $500 I lost dealing with this piece of junk, I could’ve used to make my battery bank bigger or get more solar panels, etc. etc. I mean I would’ve even been thrilled if they would’ve simply offered me a $60 partial refund to discover all the wasted money in materials I had to buy the get this thing running at the very least. Because it bare minimum, nobody should ever order anything online that’s brand new and have to spend money fixing it to get it to work. I mean, I’ve literally purchased $200 items in the past where something very small was either missing or broke let’s say and immediately the company let me know and offered you know like a $50 partial refund for something like a $15 power cord or something I had to get separately Without hesitation so the fact this company can’t even do something similar on a much more expensive and bigger issue situation really shows you their true colors again not to mention the fact that I’m assuming a vast majority people don’t just have welders laying around and many years experience doing this type of work. And them even offering like a $60 partial refund isn’t even necessarily about the money. It’s just more of the point this is something I would expect buying some Chinese brand on AliExpress not a fairly well-known name brand on Amazon that’s for sure. Just please listen and read this review when I say this thing is not worth it. I genuinely mean it and like I said, I almost never leave reviews.

    56 people found this helpful
    Sending feedback...
    Thank you for your feedback.
    Sending feedback...
    Thanks, we'll investigate in the next few days.
  • 5 out of 5 stars
    Solid piece of equipment and well designed
    Reviewed in the United States on July 31, 2025
    Brief content visible, double tap to read full content.
    Full content visible, double tap to read brief content.

    This is the first generator that I have owned. I have not had a need to use it during a power outage yet, but I am very impressed with the design and operation so far. I am an engineer by degree (not electrical) but the design of this machine is impressive. The assembly was very straightforward. Actual small wrenches, not pressed pieces of metal, were provided in sufficient quantity to fully complete the assembly. The oil fill has a sufficient diameter inlet to visually confirm that the proper amount of oil has been added, and a funnel is also provided with the machine. You will need to purchase your own oil in a type to match the temperatures where you live. The fuel fill is a large diameter to help reduce spillage when filling the tank. It comes with a large microfilter to collect any debris, and the cap is connected by a chain to prevent you from dropping it and getting dirt and debris on the gasket which can harm the engine. The fuel fill is also recessed with a spillway so that if any fuel is spilled it is diverted away from areas where damage could be incurred. The battery has a quick connect so that you can easily prevent the battery from draining when not in use. The push button start works like a champ. Just open the fuel valve and slide the choke to run once the engine starts. I read one review that their generator didn’t stop when the run switch was turned off. I can only assume that they did not read the instructions and failed to close the fuel valve prior to switching the generator off. American made is always a huge plus. Overall, it is a very smartly designed machine. The manual recommends running the unit for 20 minutes per month. I intend to do just that and expect many years of operation out of this well-made machine. A solid 5-star piece of equipment.

    9 people found this helpful
    Sending feedback...
    Thank you for your feedback.
    Sending feedback...
    Thanks, we'll investigate in the next few days.
Sponsored

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

From WEN

4.4 out of 5 stars, 3,420 ratings

Customer reviews

100+ viewed in past month

About this Item

  • 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

Product 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®.

Feedback

Did you find this product summary feature useful?

Thank you for your feedback
Thank you for your feedback. You selected "Yes, it is useful"
Thank you for your feedback. You selected "No, it is not useful"
Product summary presents key information. Close to see all product details.