WEN DF400iX Super Quiet 4000-Watt Dual Fuel RV-Ready Electric Start Portable Inverter Generator with Fuel Shut-Off and CO Shutdown Sensor - DF400iX
Remember when you had clean and quiet portable power? The WEN 4000-Watt Dual Fuel Inverter Generator produces clean energy free of voltage spikes and drops without all of the noise of a regular generator. Generate up to 4000 surge watts and 3200 rated watts of power on gasoline, or connect a propane tank for up to 3200 surge watts and 2900 running watts of power on LPG. The WEN Watchdog CO Shutdown Sensor helps protect both you and your family by automatically turning off the generator if dangerous levels of carbon monoxide are detected. Our 212cc 4-stroke air-cooled OHV engine operates at an extremely quiet 58 decibels at quarter load, about as quiet as a window air conditioner or the average conversation. This limits its invasiveness while hunting, camping, tailgating and restoring back-up power. Our unique Auto Fuel Selection Technology automatically switches between propane and gasoline for longer run times with limited hassle. The keyless electric start lets you turn on your generator at the press of a button, and includes a recoil pull starter as backup. The WEN 4000W Inverter Generator is also equipped with fuel shutoff.
- Dual fuel design runs on both gasoline (4000 surge watts, 3200 rated watts) and propane (3200 surge watts, 2900 rated watts)
- Auto Fuel Selection Technology automatically switches from propane to gasoline for longer run times
- EPA III compliant 212cc engine provides extremely quiet operation (58 dBA at quarter load, 22 feet)
- The WEN Watchdog CO Shutdown Sensor helps protect both you and your family by automatically turning off the generator if dangerous levels of carbon monoxide are detected
- Fuel shutoff maximizes the generator’s lifespan by using up the remaining fuel in the carburetor before shutting down
What Our Experts Think
-
Dual-fuel flexibility: Switch between gasoline and propane for dependable power in any situation.
-
Clean, stable inverter output: Protects sensitive electronics with low-distortion power free from spikes and drops.
-
Ultra-quiet operation: Runs at just 58 dB at quarter load—ideal for campsites, RV parks, and residential use.
-
RV-ready convenience: Features 30A RV ports and electric start for fast, effortless setup.
-
Built-in safety: CO Shutdown Sensor automatically powers off the generator if unsafe carbon monoxide levels are detected.
Q&A
-
Q: What are the power ratings on gasoline and propane?
A: Gasoline: 4000 surge / 3200 running watts. Propane: 3200 surge / 2900 running watts.
-
Q: Is it safe for sensitive electronics?
A: Yes—the inverter produces clean, stable power with minimal harmonic distortion.
-
Q: How loud is the DF400iX?
A: Only 58 dB at quarter load, comparable to a window AC unit.
-
Q: Does it offer electric start?
A: Yes—electric start is included for quick, reliable ignition.
-
Q: Is it RV-ready?
A: Yes—equipped with RV-compatible outlets and dual-fuel capabilities.
-
Q: Does it have CO safety protection?
A: Yes—the WEN Watchdog CO Shutdown Sensor automatically shuts the unit down when CO levels are unsafe.
Maintenance Tips
-
Change the engine oil at recommended intervals to ensure consistent performance.
-
Clean or replace the air filter regularly to maintain airflow and engine health.
-
Inspect spark plug and fuel lines periodically for signs of wear.
-
Run the generator monthly to keep internal parts lubricated.
-
Use fresh, stabilized fuel during storage to help prevent carburetor buildup.
