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WEN GN400i Spec Review

The WEN GN400i is a compact and lightweight open frame portable inverter generator with a rated wattage of 3500 W and a starting wattage of 4000 W.

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Picture 1 of the WEN GN400i
Picture 2 of the WEN GN400i
Picture 3 of the WEN GN400i
Picture 4 of the WEN GN400i
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Set an alert for the WEN GN400i - Current lowest price: 421.30
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Price History
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Price history for the WEN GN400i
Latest updates:
  • $421.30 - June 26, 2020
  • $433.07 - June 23, 2020
  • $420.46 - June 7, 2020
  • $460.37 - May 19, 2020
  • $446.96 - May 11, 2020
  • $433.94 - May 3, 2020
  • $421.30 - April 18, 2020
  • $422.14 - April 16, 2020
Data source: homedepot.com
Since: April 16, 2020
  • Highest Price: $460.37 - May 19, 2020
  • Lowest Price: $420.46 - June 7, 2020

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, at approximately half the noise level of a standard generator. 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 laptops, cellphones, monitors, tablets and other sensitive electronics. (source: WEN (opens in a new tab))

Zoom on the WEN GN400i

In summary, the WEN GN400i is a compact and lightweight portable inverter generator especially useful for:

  • RV travellers looking for even more independence
  • People occasionally participating in outdoor fairs, festivals or events
  • Handcrafting enthusiasts who wish to work on-the-go
  • Homeowners in need of an emergency backup power for their essentials
  • Camping and tailgating buffs looking to enhance their experience

In the sections ahead, the power characteristics, availability of various outlets, the portability, and any additional features of the device shall be discussed, including its emission compliance information.

Power & Run Time

The WEN GN400i in use

The WEN GN400i

The WEN GN400i's design includes a gasoline-fueled 212 cc OHV 4-stroke engine. With a 120V output, it gives a running wattage of 3500W and also a peak wattage of 4000W. Moreover, since it is parallel capable (WEN Parallel Connection Kit (opens in a new tab) not included), its power may be doubled if linked to a second compatible unit.

The inverter generator features a simple traditional pull-start mechanism. It is rated for a noise of 67 dBA (less noisy than an office).

With a full tank, the GN400i can operate for around 7 hours at 50% load (fuel consumption around 0.26 GPH), thanks to its fuel capacity of 1.85 gallon.

As the GN400i produces a clean sine wave, with a <1.2% Total Harmonic Disruption (THD), sensitive electronics may be plugged in the AC outlets safely.

Outlets

The control panel features the upcoming 3 AC outlets:

Duplex 120V 20A (5-20R)
120V 30A (TT-30R) receptacle

Furthermore, it has 2 DC outlets: there's two 5V USB ports with which charging of electronics like mobile phones and tablets is made convenient.

With its TT-30R receptacle (TT as in 'Travel Trailer'), this WEN generator is RV Ready.

Portability

The dimensions of the WEN GN400i, which are L19.8 x W13.8 x H18.9 in, and its typical, open frame design provides stability and enables the generator to be raised above ground level. This type of design is ideal for tough environments and heavy outdoor use.

As the GN400i's weight is only 66.1 lbs, it can follow you and your power needs anywhere. Furthermore, the open frame of the generator further helps when holding and moving it to a different place.

Features

Panel of the WEN GN400i

The GN400i's control panel

Some light indicators allow you to instantly see if the generator is overloaded, the generator is ready and the oil level is too low.

The inverter generator allows for a quick, easy and convenient assessment of its gas level, as it is equipped with a built-in fuel gauge.

The fuel shutoff feature turns off the flow of fuel, allowing for the GN400i to use up the remaining fuel from the carburetor before automatically shutting down. This helps fight the build-up and blockages caused by stagnant fuel inside of the carburetor, minimizing maintenance while prolonging the unit’s lifespan.

As far as security is concerned, the generator can be used with a peace of mind, as it features an overload protection (circuit breaker) and an automatic low oil shut-off.

Besides the classic documentation and an owner's manual (opens in a new tab) to get you promptly started, the WEN GN400i also comes with some accessories: oil, tool kit and funnel are included.

Emissions

The WEN GN400i is EPA-approved and CARB-compliant. Therefore, its sale and purchase are permitted in all of the 50 states, including California.

Moreover, it features a spark arrestor, so it is adequate for use in forested areas.

Product Video

The WEN GN400i versus other generators

The following charts are provided to give you an idea of how some of the key specs of the WEN GN400i compare to generators of similar power (between 3000 and 4000 W).

  • Weight-wise, the WEN GN400i has only 66.1 lbs, which renders it one of the lightest generators which produce 3000 to 4000 rated watts.
  • Since the inverter generator's noise is rated at 67 dBA, it has the roughly average expected noise for a device of similar power. If you’d prefer a less noisy device, one of the most quiet devices, which share the same power range with this one, is the Cat INV4000E, whose lowest noise levels reach just 51 dBA.
  • As far as autonomy is concerned, providing around 7 hours of runtime with a full tank at a 50% load, the GN400i falls into the low end in comparison with other devices of a comparable power output. Furthermore, considering the run times, one of the generators which have a roughly same power output, with the highest autonomy, is the Honda EB4000, as it provides around 16 hours.
  • Autonomy holds its importance, however, it is largely dependent on the generator’s fuel capacity and so, it is nonsensible to discuss it without mentioning fuel efficiency as well. This inverter generator can be considered as fuel efficient, due to its low estimated fuel consumption of only 0.26 GPH (gallon per hour) at 50% load, within the aforementioned wattage range. If fuel consumption is your top priority, we suggest to check out the Westinghouse iGen4200, which has a fuel consumption of only 0.17 GPH and thus, is one of the most efficient devices in our database.
According to our stats, the following comparison is pretty popular: WEN GN400i vs WEN 56380i.

Price comparison

As you can see from this interactive chart, when compared to other 3000-4000W generators, the WEN GN400i is on the cheap side of the price range.

It can therefore be a really good buy if you're looking to acquire a budget generator.

The bottom line

STRENGTHS:
  • Inexpensive
  • Several accessories included
  • RV Ready
  • Parallel capable
  • Inverter
  • Lightweight (66.1 lbs)
  • Fuel efficient
AVERAGE SPECS:
  • Acceptable noise (67 dBA)
WEAKNESSES:
  • No data center
  • No electric start
  • Relatively low run time

Do you own the WEN GN400i and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

Features and Specifications

General
InverterYes
PortableYes
Parallel capableYes, cable not included
RV readyYes
FuelGasoline
Engine212 cc OHV 4-stroke
Starting systemRecoil
Power
VoltageAC: 120V 60 Hz, DC: 5V
Running watts3500 W
Starting watts4000 W
Running amps29.2 amps
Peaks amps33.3 amps
Run time @50% load7 h
Run time @25% loadN/A
Features
GFCI outletsNo
Covered outletsNo
Automatic Voltage RegulationInverter
AC outlets
  • 1x Duplex 120V 20A (5-20R)
  • 1x 120V 30A (TT-30R)
DC outlets2x 5V USB port
Data centerNo
IndicatorsLow oil, overload and output ready
Fuel tankSteel, 1.85 gal
Fuel gaugeYes
Misc
Weight66.1 lbs
Approx. dimensions (L x W x H)19.8 x 13.8 x 18.9 in
Noise (lower limit)67 dBA
THD< 1.2%
EmissionsCARB, EPA
SecurityLow oil and overload protection
Spark arrestorYes
NeutralFloating
Accessories includedOil, funnel and tool kit
Warranty2 years

Unlike many websites, we did our best to research each of the specs above. That being said, we are not immune to making the occasional mistake or omission. Should you notice any missing or incorrect values, don't hesitate to suggest improvements so we can address the issue.

About WEN

WEN Products, founded by Nick Anton in 1951, is an American power tool manufacturer and distributor, which claims to have a part in the development of modern chainsaw, soldering devices and wet sharpeners, through its research in random orbital technology. The Illinois based company expanded its distribution network to include various power tools, such as presses, drills and of course, power generators. As a distributor, WEN’s portfolio largely consists of branded products of different manufacturers, imported from Asia.

Warranty Information

The WEN GN400i is covered under a warranty for up to 2 years. This warranty may be limited and may not cover all parts of the generator.
For more information about the warranty of WEN generators, please consult WEN's warranty policies (opens in a new tab). Alternatively, you can also contact their Customer Support: 1-847-429-9263.

Questions & Answers

What can it power?
Examples of items that can be simultaneously powered.
The examples below are based on a maximum load of 80% and estimated wattages. For a more accurate estimation, use our generator size calculator.
ItemRunning WattsStarting Watts
At homeAC (10,000 BTU)15002200
Refrigerator (energy star)1921192
Vacuum cleaner10751175
Cell phone charger2020
Total2787 W3787 W
For campingRV AC (11,000 BTU)10101600
RV refrigerator180600
Electric fry pan15001500
Radio100100
Total2790 W3380 W
For workGrinder14002500
Demolition hammer12601260
Bug zapper8080
Total2740 W3840 W
Does this model have a fuel shutoff? (Asked February 26, 2020)

This model has a manual fuel shutoff. There's a valve that you can turn to the OFF position in order to let the generator run until the fuel is used up.

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