WEN DF402iX - 3500/4000W Dual Fuel Open Frame Inverter Generator

The WEN DF402iX is a compact and lightweight open frame dual fuel inverter generator with a rated wattage of 3,500 W and a starting wattage of 4,000 W. (Read full specs)

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Set an alert for the WEN DF402iX - Current lowest price: $523.32
Price History
Price history for the WEN DF402iX
Latest updates:
  • $523.32 - May 7, 2024
  • $517.44 - April 29, 2024
  • $515.69 - November 19, 2023
  • $518.80 - November 12, 2023
  • $519.84 - November 5, 2023
  • $521.92 - October 29, 2023
  • $524.02 - October 22, 2023
  • $525.07 - October 15, 2023
Data source: homedepot.com
Since: June 25, 2023
  • Highest Price: $552.04 - August 27, 2023
  • Lowest Price: $515.69 - November 19, 2023


Zoom on the WEN DF402iX

In short, the WEN DF402iX is a compact and lightweight portable inverter generator adequately designed for:

  • RV travellers looking for even more independence
  • People occasionally participating in sporting competitions, open-air performances and outdoor festivals
  • DIYers who wish to improve their efficiency with tools
  • Homeowners who want to be sure of their ability to power their fridges, cooking tools, heating and lighting equipment during power failures
  • Camping and tailgating hobbyists looking for a portable power source

The following sections will present you in detail its power characteristics, the different outlets it offers, its overall portability, and the extra features it benefits from.

Power & Run Time

With its dual-fuel technology, the powerful and versatile WEN DF402iX provides an output of 120V. While gasoline-powered, it gives a running wattage of 3,500W along with a peak wattage of 4,000W. While propane-powered, it provides 3,200 rated watts and 3,600 starting watts. Moreover, since it is parallel capable (GNA50i parallel kit (opens in a new tab) not included), its power may be increased if linked to a second compatible unit.

Its starting mechanism relies on a standard recoil pull-rope starting mechanism.

In terms of run time, the DF402iX, boasting a 1.85 gallon fuel tank, can run for around 7 hours at 50% load on a full tank of gasoline (with fuel consumption averaging 0.26 gallons per hour). Additionally, it provides around 9.5 hours (on a 20 lbs tank - propane consumption around 0.49 GPH) of operation with propane.

The <1.2% Total Harmonic Distortion (THD) of the DF402iX ensures a clean sine wave output, providing a secure power source for your sensitive electronics through its AC outlets.


The control panel provides the upcoming 3 AC outlets:

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

Furthermore, it showcases 2 DC outlets: there's two 5V USB ports (USB-A) with which you may charge electronics, for example mobile phones or tablets, conveniently.

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


Measuring L19.8 x W13.8 x H18.9 in, the classic open frame construction of the WEN DF402iX provides stability while enabling convenient maintenance access to components and adequate air cooling. The generator is designed for ideal use outdoors and in rough environments.

The DF402iX can be taken anywhere with you, thanks to its weight of 66.1 lbs. Additionally, the open frame design of the generator ensures easy grabbing and shifting for relocation.


Panel of the WEN DF402iX

The DF402iX's control panel

The light indicators show you if the generator is overloaded, the oil level is too low and the generator is ready.

Thanks to its built-in fuel gauge, the inverter generator allows you to quickly, conveniently, and easily check the gas level at a glance.

From a security standpoint, the product offers an overload protection (circuit breaker), an automatic low oil shut-off and a low fuel automatic shutdown, allowing you to use it with a peace of mind.

The unit also benefits from WEN's CO Watchdog carbon monoxide detection. This system measures the accumulation of poisonous CO gas while the generator is running. If the level of CO gas gets too high, the CO Watchdog system will automatically shut down the generator.

While the standard documentation and an owner's manual (opens in a new tab), helpful for starting the device promptly, come with the WEN DF402iX, the following accessories are also included: funnel, propane hose, 2 altitude kits and tool kit. An official storage cover is also available, as a separate purchase.

The WEN DF402iX versus other generators

The following charts are provided to give you an idea of how some of the key specs of the WEN DF402iX compare to inverter generators of similar power (between 3000 and 4000 W).

  • When it comes to weight, the WEN DF402iX tips the scales at just 66.1 pounds, making it one of the lighter inverter generators in the 3000 to 4000 rated wattage range. if you wish to prioritize weight, the Pulsar PGD40iSCO is one of the top contenders in its power category, weighing only 46 pounds.
  • Regarding its runtime, the DF402iX operates for around 7 hours at a 50% load, positioning it at the lower spectrum among comparable inverters. If runtime is a priority for you, the Westinghouse iGen4500DF stands out as one of the generators with the longest run time in its power range, providing around 15 hours of continuous use.
  • Run time is a key metric, but it's dependent on the generator's fuel tank capacity. Therefore, discussing fuel efficiency is necessary for a complete understanding. This inverter generator, with an estimated fuel consumption of just 0.26 GPH (gallon per hour) at 50% load, is one of the more fuel-efficient generators, for the previously mentioned wattage range. If not satisfied with the afore-mentioned fuel consumption, you may wish to check out the Pulsar PGD40iSCO. With a fuel consumption of as little as 0.22 GPH, it is one of the most efficient generators currently on the market.

Price comparison

As you can see from these interactive charts, when compared to other 3000-4000W dual fuel inverter generators, the WEN DF402iX 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

  • Inexpensive
  • Dual Fuel
  • CO Watchdog
  • Several accessories included
  • RV Ready
  • Parallel capable
  • Inverter
  • Lightweight (66.1 lbs)
  • Fuel efficient
  • No data center
  • No electric start
  • Relatively low run time

Do you own the WEN DF402iX and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

Features and Specifications

Parallel capableYes, cable not included
RV readyYes
FuelDual Fuel (gasoline/propane)
Engine212 cc OHV 4-stroke
Starting systemRecoil
Warranty2 years
VoltageAC: 120V 60 Hz, DC: 5V
Running watts3,500 W3,200 W
Starting watts4,000 W3,600 W
Running amps29.2 amps26.7 amps
Peak amps33.3 amps30 amps
Run time @50% load7 h9.5 h
Run time @25% loadUnknownUnknown
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 (USB-A)
Data centerNo
IndicatorsLow oil, overload and output ready
Fuel tank1.85 gal
Fuel gaugeYes
Weight66.1 lbs
Approx. dimensions (L x W x H)19.8 x 13.8 x 18.9 in
Noise (lower limit)Unknown
THD< 1.2%
SecurityLow oil, overload and low fuel protection, CO monitoring
Spark arrestorYes
Accessories includedFunnel, tool kit, propane hose, and 2 altitude kits

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.

Spec Improvement×

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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 DF402iX 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 wattage calculator.
ItemRunning WattsStarting Watts
At homeMicrowave (1000 watts)15001500
Refrigerator (energy star)1921192
Vacuum cleaner10751175
Cell phone charger2020
Total2787 W3787 W
For campingRV AC (11,000 BTU)10101600
RV refrigerator180600
Microwave (1000 watts)15001500
Total2790 W3380 W
For workGrinder14002500
Demolition hammer12601260
Bug zapper8080
Total2740 W3840 W
What's the next size up? (Asked July 11, 2023)

You may want to have a look at this list of WEN inverter generators. They all provide over 3,500 running watts.

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