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WEN DF400i - 3200/4000W Dual Fuel Inverter Generator

The WEN DF400i is a quiet and compact dual fuel inverter generator with a rated wattage of 3200 W and a starting wattage of 4000 W.

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Set an alert for the WEN DF400i - Current lowest price: $959.99
Price History
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Price history for the WEN DF400i
Latest updates:
  • $959.99 - July 11, 2022
  • $1,139.89 - July 2, 2022
  • $959.99 - July 1, 2022
  • $719.99 - June 30, 2022
Data source: ebay.com
Since: June 30, 2022
  • Highest Price: $1,139.89 - July 2, 2022
  • Lowest Price: $719.99 - June 30, 2022

Description

Zoom on the WEN DF400i

In a nutshell, the WEN DF400i is a quiet and compact portable inverter generator mostly geared towards:

  • RV travellers wishing to enhance their freedom and nomad lifestyle
  • People occasionally participating in outdoor fairs, festivals or events
  • Amateur DIY lovers
  • 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 dual-fuel technology of the WEN DF400i allows for an output of 120V and provides superb power and versatility. If gasoline-powered, the device provides a running wattage of 3200W and a starting wattage of 4000W. If propane-powered, it gives 2900 rated watts and 3200 starting watts. In addition, the device is parallel capable (parallel kit not included) and thus, can be linked to a similar or compatible unit for added power.

WEN’s Auto Fuel Selection technology automatically selects the fuel source (LPG or gasoline) depending on availability and prioritizes LPG. Thus, if a propane tank with enough LPG is connected, the generator will automatically use LPG. If no propane tank is connected, or if there is not enough LPG remaining in the tank, the generator will use gasoline.

Enjoying a noise rating of 58 dBA (less noisy than rainfall), this inverter generator can be started thanks to a simple traditional pull-start mechanism, but also to a simple and elegant electric starter (battery included).

As for its running time, the DF400i, along with its 2.2 gallons fuel capacity, can run for around 8.5 hours at 50% load with a full tank filled with gasoline (fuel consumption around 0.26 GPH). If propane is used, it can operate for around 9 hours (on a 20 lbs tank - propane consumption around 0.52 GPH).

Delicate electronics can be plugged in an AC outlets safely, as the DF400i generates a clean sine wave, reaching a <1.2% Total Harmonic Disruption (THD).

Outlets

The control panel includes the following 3 AC outlets:

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

In addition, it provides 3 DC outlets: there's two 5V USB ports with which charging of electronics like mobile phones and tablets is made convenient and a 12V 8A (cigarette lighter style) receptacle with which you may charge your batteries with ease.

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

Portability

The WEN DF400i is an inverter generator and has an encased design of the following dimensions: L23.2 x W18 x H20.1 in. Thus, it is more aesthetical than conventional, open frame products. The featured design follows the latest trends and is ideal for easy and recreational use.

Although this generator is technically considered 'portable' (in the sense that it can be moved), its 100 lbs make it incredibly difficult to manually lift and transport. Nevertheless, it can still be moved quite conveniently with the help of its set of 2 wheels and its folding handle, once it is placed on the ground.

Features

Panel of the WEN DF400i

The DF400i's control panel

A digital data center, one of the features of the DF400i's control panel, gives you information on the lifetime run hours, frequency, voltage, fuel level and power output, and thus, is helpful for the monitoring of its activity and status.

In addition to this info, the device’s light indicators will display if the generator is ready, the oil level is too low and the generator is overloaded.

The fuel shutoff feature turns off the flow of fuel, allowing for the DF400i 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 the carburetor, minimizing maintenance while prolonging the unit’s lifespan.

From a security point of view, the generator is equipped with an automatic low oil shut-off and an overload protection (circuit breaker), giving you a peace of mind during use.

With the basic documentation and an owner's manual (opens in a new tab), letting you start the generator quickly, the WEN DF400i also comes with several accessories, including: tool kit, funnel and propane hose. An official storage cover is also available, as a separate purchase.

Emissions

The WEN DF400i is EPA-approved and CARB-compliant. It can therefore be sold and purchased in all 50 states, including California.

Moreover, it features a spark arrestor and thus, may be used in forested areas.

Product Videos

The WEN DF400i versus other generators

The following charts are provided to give you an idea of how some of the key specs of the WEN DF400i compare to inverter generators of similar power (between 2500 and 3500 W).

  • Since the generator weighs in at a dry weight of 100 lbs, the WEN DF400i belongs in the expected weight range for inverters which can produce between 2500 and 3500 rated watts. If weight is your top priority, one of the champions in this power category is the Genmax GM3300i, weighing just 47.4 pounds.
  • With a lowest noise rating of 58 dBA, the inverter generator is one of the more quiet of the generators of similar type and power. If noise emissions are one of your priorities, you may be interested in the Honda EU3000iS, one of the least noisy generators similarly powerful as this one, rated for 50 dBA.
  • The DF400i, falls within the average autonomy range compared to inverter generators of a roughly same power, with a run time of around 8.5 hours at a 50% load and a full tank. If autonomy is your priority, one of the devices of a similar power output with the highest run time is the Ryobi RYi4022X, reaching around 12 hours.
  • The run time is important, but also hugely depends on the capacity of the fuel tank and doesn't mean much if we don't talk about fuel consumption as well. With an estimated gasoline consumption of 0.26 GPH (gallon per hour) at 50% load, this inverter generator is among the more fuel efficient of the products in the above-mentioned wattage range. If not satisfied with the afore-mentioned fuel consumption, you may wish to check out the Genmax GM3300i. With a fuel consumption of as little as 0.22 GPH, it is one of the most efficient generators currently on the market.

Here's a list of the most popular specific comparisons:

Price comparison

As you can see from this interactive chart, when compared to other 2500-3500W dual fuel inverter generators, the WEN DF400i is on the average side of the price range.

Therefore, this generator nicely fits in the expected budget for this kind of product.

The bottom line

STRENGTHS:
  • In the expected price range
  • Several accessories included
  • RV Ready
  • Electric start
  • Parallel capable
  • Dual Fuel
  • Auto Fuel Selection technology
  • Inverter
  • Quiet for its power (58 dBA)
  • Fuel efficient
AVERAGE SPECS:
  • Decent weight (100 lbs)
  • Decent run time
WEAKNESSES:
  • No remote start

Do you own the WEN DF400i 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
FuelDual Fuel (gasoline/propane)
Engine212 cc OHV 4-stroke
Starting systemRecoil, Electric
VoltageAC: 120V 60 Hz, DC: 12V
Power
 GasolinePropane
Running watts3200 W2900 W
Starting watts4000 W3200 W
Running amps26.7 amps24.2 amps
Peak amps33.3 amps26.7 amps
Run time @50% load8.5 h9 h
Run time @25% loadUnknownUnknown
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
1x 12V 8A (cigarette lighter style)
Data centerPower output, fuel level, lifetime run hours, voltage and frequency
IndicatorsLow oil, overload and output ready
Fuel tank2.2 gal
Fuel gaugeDigital
Misc
Weight100 lbs
Approx. dimensions (L x W x H)23.2 x 18 x 20.1 in
Noise (lower limit)58 dBA
THD< 1.2%
ComplianceCARB, EPA
SecurityLow oil and overload protection
Spark arrestorYes
Accessories includedFunnel, tool kit, propane hose, and battery
Warranty2 years
UPC044459004004

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.

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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 DF400i 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 sizing calculator.
ItemRunning WattsStarting Watts
At homeMicrowave (1000 watts)15001500
Refrigerator (energy star)1921192
Freezer8101750
Set of 5 LED light bulbs5555
Total2557 W3557 W
For campingRV AC (11,000 BTU)10101600
RV refrigerator180600
Radiant heater13001300
Set of 5 LED light bulbs5555
Total2545 W3135 W
For workGrinder14002500
Belt sander11502400
Total2550 W3800 W

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