Find My GeneratorFind my size
Back to catalog

WEN · Inverter generator · Model DF400i

DF400i

DF400i Super Quiet 4000-Watt Dual Fuel RV-Ready Electric Start Portable Inverter Generator with Fuel Shut-Off

3,200W running4,000W startingDual fuel: gasoline + propaneEngine displacement not listed in the catalog description
View model at WEN Last listed $889.99
WEN DF400i Super Quiet 4000-Watt Dual Fuel RV-Ready Electric Start Portable Inverter Generator with Fuel Shut-Off
Official product image · WEN Products

Infographic gallery

Output, fuel flexibility, runtime, and ownership.

01 · Output by fuel

4,000W maximum starting output

Gasoline3,200W / 4,000W
Propane2,900W / 3,200W

Bars compare WEN's published running and starting capacity for each fuel configuration.

02 · Fuel & runtime

Dual fuel: gasoline + propane

Model-specific energy system and manufacturer-published operating information.

Capacity

The lightweight design along with the built-in wheels and folding handle make for easy portability while the ultra-efficient 2.2-gallon tank provides up to 8.5 hours of half-load run time.

Published runtime

Auto Fuel Selection Technology automatically switches from propane to gasoline for longer run times.

03 · Portability & price

113.5 lb (official listing weight)

Official listing weight

WEN price
$889.99
Availability
Currently sold out
Model
DF400i
04 · Controls & protection

Starting

Electric start with recoil backup

Voltage

120V

Fuel shutoff

Published

CO shutdown

Not listed

Official product gallery

Product views and WEN feature graphics.

This gallery uses the current official image set published for model DF400i.

DF400i official WEN product image 1
Published by WEN Products · image 1 of 6
DF400i official WEN product image 2
Published by WEN Products · image 2 of 6
DF400i official WEN product image 3
Published by WEN Products · image 3 of 6
DF400i official WEN product image 4
Published by WEN Products · image 4 of 6
DF400i official WEN product image 5
Published by WEN Products · image 5 of 6
DF400i official WEN product image 6
Published by WEN Products · image 6 of 6

Complete specifications

The fields that matter for comparison.

Output, engine, fuel, runtime, outlet, sound, weight, safety, price, and warranty details come from WEN's current official collection, model description, product imagery, and manual link.

Combustion generators are for outdoor use only. Keep the generator at least 20 feet from occupied buildings with exhaust directed away from doors, windows, and vents.

Product overview

Dual fuel design runs on both gasoline (4000 surge watts, 3200 rated watts) and propane (3200 surge watts, 2900 rated watts).

Electrical output by fuel

Gasoline output
3,200W running / 4,000W starting
Propane output
2,900W running / 3,200W starting
Voltage
120V
Outlet panel
Includes electric start for easy ignitions, onboard wheels and carrying handle, two three-prong 120V receptacles, one RV-ready AC 120V NEMA TT-30R receptacle, one 12V DC receptacle, one 5V USB port, a digital load and fuel display, and a three-year warranty.
Power quality
Produces clean power to prevent damage to sensitive electronics such as smart phones, tablets and laptops.
Parallel capability
Published as parallel capable; compatible kit sold separately

Engine, fuel & runtime

Engine or power system
Engine displacement not listed in the catalog description
Starting system
Electric start with recoil backup
Fuel options
Dual fuel: gasoline + propane
Fuel capacity
The lightweight design along with the built-in wheels and folding handle make for easy portability while the ultra-efficient 2.2-gallon tank provides up to 8.5 hours of half-load run time.
Published runtime
Auto Fuel Selection Technology automatically switches from propane to gasoline for longer run times.
Published sound information
EPA III 212cc engine provides extremely quiet operation (58 dBA at quarter load, 22 feet).
Fuel shutoff
Yes — published by WEN

Portability, protection & ownership

Listing weight
113.5 lb (official listing weight)
Carbon-monoxide shutdown
Not listed for this model
Low-oil shutdown
Yes — published by WEN
Warranty
Includes electric start for easy ignitions, onboard wheels and carrying handle, two three-prong 120V receptacles, one RV-ready AC 120V NEMA TT-30R receptacle, one 12V DC receptacle, one 5V USB port, a digital load and fuel display, and a three-year warranty.
Price and availability
Last listed WEN price: $889.99
Official model
DF400i

Official feature details

Published WEN feature

Dual fuel design runs on both gasoline (4000 surge watts, 3200 rated watts) and propane (3200 surge watts, 2900 rated watts)

Output and operation

Auto Fuel Selection Technology automatically switches from propane to gasoline for longer run times

Controls and convenience

EPA III 212cc engine provides extremely quiet operation (58 dBA at quarter load, 22 feet)

Power-panel capability

Fuel shutoff maximizes the generator’s lifespan by using up the remaining fuel in the carburetor before shutting down

Protection and ownership

Produces clean power to prevent damage to sensitive electronics such as smart phones, tablets and laptops

Portability detail

Includes electric start for easy ignitions, onboard wheels and carrying handle, two three-prong 120V receptacles, one RV-ready AC 120V NEMA TT-30R receptacle, one 12V DC receptacle, one 5V USB port, a digital load and fuel display, and a three-year warranty

Best-fit uses

  • RV and camping
  • Refrigerators and household essentials
  • Jobsite tools
  • Storm preparation

Standout features

  • 4,000W starting / 3,200W running
  • Dual fuel: gasoline + propane
  • Electric start with recoil backup
  • Low-oil automatic shutdown

Match it to the equipment you'll actually run.

Use the independent wattage calculator before buying.

Check my power plan
Sources: WEN DF400iAll WEN generatorsOfficial manualVerified September 15, 2026

Ownership resources

Accessories, manuals, and documents.

Start with the exact WEN DF400i model or item number. Accessory families can look alike while using different connectors, electrical limits, engines, or mounting points.

Compatible accessories

Match by model and connection.

Verify exact fit

Generator power cord or inlet connection

Use a correctly rated cord or professionally selected inlet connection for the intended load.

Match voltage, amperage, blade pattern, and wire rating to TT-30R. Home connections require approved transfer equipment and qualified installation.
View official accessory options
Verify exact fit

Parallel kit

This model’s published information references parallel operation. Use the manufacturer’s matching kit and pairing rules.

Confirm that the kit explicitly names DF400i or its exact generator family before connecting another unit.
View official accessory options
Verify exact fit

Maintenance kit and service parts

Model-matched filters, spark plugs, batteries, oil supplies, and service parts support scheduled maintenance.

Match the complete DF400i model or item number and follow the maintenance table in its manual.
View official accessory options
Verify exact fit

Storage cover or approved running shelter

A fitted storage cover protects a cooled, stored generator. A running shelter must be designed for generator operation.

Never run a fuel-burning generator indoors or inside a storage cover. Follow the manual’s clearance and ventilation requirements.
View official accessory options

Manuals & PDFs

Official product materials.

Owner’s or operator’s manualPDFOperating, safety, maintenance, and troubleshooting instructions for DF400i.Official product pageProduct pageCurrent manufacturer overview, notices, specifications, downloads, and support links.

Compatibility note: Links lead to manufacturer or official retailer resources. Confirm the full model or item number, connector type, voltage, amperage, and published compatibility list before buying. Installation involving a home panel, inlet, transfer switch, or fuel plumbing should be handled as required by local code.