Wen GN400i Review - Open Frame Dual Fuel Inverter Generator

In today’s fast-paced world, a reliable and versatile power source is essential for various activities, ranging from camping trips and outdoor events to backup power during emergencies. The Wen GN400i Dual Fuel Inverter Generator has emerged as a notable contender, offering a powerful and flexible solution to meet diverse energy needs.

With its 4000-watt power output, dual fuel capability, and user-friendly features, the GN400i aims to redefine portable power. In this comprehensive review, we will delve into the features, performance, pros, and cons of the Wen GN400i, while also comparing it with other prominent models such as the Wen DF400i, Westinghouse iGen4200, Wen DF402iX, and Wen 56380i. Let’s explore the world of portable power!


Brand WEN
Wattage 4000 watts
Fuel Type Gasoline
Power Source Gas Powered
Item Weight 66.1 Pounds
Voltage 120 Volts
Output Wattage 4000 Watts
Special Feature Portable

Design and Build Quality

The Wen GN400i boasts a robust design and a compact form factor. Enclosed within a sturdy steel frame, this generator is built to withstand the rigors of outdoor use. It’s portable dimensions and integrated handle make transportation hassle-free, while the rubber feet ensure stability and minimize vibrations during operation. The control panel is thoughtfully laid out, featuring clearly labeled buttons and indicators for ease of use.

Performance and Power Output

Equipped with a powerful 212cc 4-stroke engine, the Wen GN400i is a 4000-watt inverter generator that delivers impressive performance. What sets it apart is its dual fuel capability, allowing it to run on both gasoline and propane. With a starting wattage of 4000W and a running wattage of 3500W, the GN400i provides ample power to run essential appliances, electronics, and even high-demand devices.

When compared to the Wen DF400i, its sibling model, the GN400i offers similar power output capabilities. However, the GN400i’s dual fuel functionality gives it an edge, providing users with the flexibility to choose between gasoline and propane as fuel sources. This versatility allows users to adapt to different fuel availability and preferences.

Performance and Power Output

In a comparison with the Westinghouse iGen4200, while both generators have similar power outputs, the GN400i surpasses the iGen4200 with its dual fuel capability. This feature allows users to adapt to different fuel availability and preferences, making the GN400i a more versatile choice.

Another model in the Wen lineup, the Wen DF402iX, is also a dual-fuel generator. However, the GN400i outperforms it in terms of power output, making it suitable for a wider range of applications.

Let’s also consider the Wen 56380i, a generator known for its portability. While the 56380i is lightweight and highly portable, it sacrifices some power output compared to the GN400i. However, the GN400i’s dual-fuel capability adds an extra layer of versatility, making it a compelling option for users who prioritize power and fuel flexibility.

Ease of Use and Safety Features

The Wen GN400i places emphasis on user-friendly design and safety features. It offers both electric start and recoil start options, providing convenience and flexibility. The control panel features a digital display that provides real-time information on voltage, frequency, and runtime, enabling users to monitor the generator’s performance easily.

Safety is a top priority, and the GN400i incorporates several protective features. The low-oil shutdown feature automatically shuts off the generator when the oil level is critically low, protecting the engine from potential damage. Additionally, overload protection safeguards against excessive power draw and potential circuit damage.

Comparatively, the Wen DF400i shares many user-friendly and safety features with the GN400i, making it a viable alternative within the Wen product line. However, the GN400i’s dual-fuel capability gives it an advantage in terms of fuel versatility.


In conclusion, the Wen GN400i Dual Fuel Inverter Generator is a reliable and versatile power solution that brings together robust performance, fuel flexibility, and user-friendly design. With its 4000-watt power output and dual fuel capability, it offers the power needed to run a wide range of appliances and devices. While compared to models like the Wen DF400i, Westinghouse iGen4200, Wen DF402iX, and Wen 56380i, the GN400i excels in power output and fuel flexibility, making it an attractive choice for users seeking a dependable portable power source.



Wen GN400i Review – FAQs

Which gas is best for the Wen gn400i generator?
The best gas for the Wen GN400i generator is unleaded gasoline, with an octane rating of 87 or higher. It is recommended to use fresh gasoline to ensure optimal performance and longevity of the generator.
Where are Wen generators made by?
Wen generators are manufactured by the company Wen Products Inc., which is based in Elgin, Illinois, United States. Wen has been producing a wide range of power tools and equipment, including generators, for over 60 years.
What is the weight of the Wen gn400i generator?
The weight of the Wen GN400i generator is approximately 99 pounds (45 kilograms). Its compact and portable design, coupled with the integrated handle, makes it relatively easy to transport and move around.
Can we run Wen gn400i generator on gas?
Yes, the Wen GN400i generator can be run on gas. It is a dual-fuel generator that offers the flexibility to run on both gasoline and propane. This allows users to choose their preferred fuel source based on availability and personal preferences.
How loud is the Wen gn400i?
The noise level of the Wen GN400i generator is around 61 decibels (dB) at a distance of 23 feet (7 meters). This makes it relatively quiet compared to many other generators in its class. The low noise level ensures a more comfortable and less disruptive experience, whether you’re using the generator for camping, outdoor events, or during power outages.



In summary, the Wen GN400i Dual Fuel Inverter Generator stands out as a powerful and versatile generator that caters to a variety of energy needs. With its outstanding performance, fuel options, and user-friendly features, the GN400i proves to be a reliable companion in both outdoor adventures and emergency situations.

Its robust design, impressive power output, and dual fuel capability make it a top contender in the portable generator market. Whether you’re camping in the wilderness or dealing with a sudden power outage, the Wen GN400i is ready to provide the energy you need to keep going.

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