- Wattage (Gas): 4,500 W / 3,500 W
- THD: < 1.2%
- Noise Level: 58 dBA
- Fuel Type: Dual Fuel (gasoline/propane)
- RV Ready: Yes
- Run Time@ 25% load: Unspecified
- Run Time@ 50% load: 8.5 h
- Weight: 100 lbs
Table Of Contents
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The WEN DF451i’s dual-fuel technology lets it put out 120V and gives it a lot of power and flexibility. If it is powered by gasoline, the device has a running power of 3,500W and a starting power of 4,500W. If it runs on propane, it has a rated power of 3150 watts and a starting power of 4500 watts. Also, since it can work in parallel (but doesn’t come with a parallel kit), its power can be increased by connecting it to a second unit that works with it. With WEN’s Auto Fuel Selection technology, the fuel source (LPG or gasoline) is chosen automatically based on availability, with LPG being given priority. So, if the generator is hooked up to a propane tank with enough LPG, the generator will automatically use LPG. If there is no propane tank attached or not enough LPG in the tank, the generator will use gasoline. The noise level of the inverter generator is set at 58 dBA (lower decibel levels than rain). It has both a traditional pull-start mechanism and an electric starter that is convenient and easy to use (battery included). With a fuel capacity of 2.2 gallons, the DF451i can run for about 8.5 hours at 0.5 load on gasoline (around 0.26 GPH), or 9 hours on a 20 lb propane tank (around 0.52 GPH). Since the DF451i makes a clean sine wave with a Total Harmonic Distortion (THD) of less than 1.2%, you can safely plug sensitive electronics into the AC outlets.
On the control panel, there are 3 AC outlets: a duplex 120V 20A (5-20R) outlet and a 120V 30A (TT-30R) outlet.It also has 3 DC outlets: a 12V 8A receptacle (like a cigarette lighter), which makes it easy to charge your batteries, and two 5V USB ports (USB-A), which make it easy to charge things like cell phones and tablets.This WEN generator is RV ready because it has a TT-30R plug.TT stands for “Travel Trailer”.
The DF451i’s control panel has a digital data center that tells you about the power output, fuel level, lifetime run hours, voltage, and frequency.This lets you keep an eye on the machine’s status and activity.In addition to this information, the lights will tell you when the generator is overloaded, when it is ready, and when the oil level is too low.The fuel shutoff feature stops the flow of fuel, which lets the DF451i use up the last of the fuel in the carburetor before shutting down automatically.This helps prevent the buildup and blockages that can happen when fuel sits in the carburetor for too long.This makes the unit last longer and requires less maintenance.As far as safety goes, the device has a circuit breaker for overload protection, an automatic low oil shut-off, and an automatic low fuel shut-off, so you can use it without worrying.The WEN DF451i comes with basic instructions and an owner’s manual that will help you start the generator quickly.It also comes with a tool kit, a funnel, and a propane hose.
The WEN DF451i is an inverter generator, and its closed design (L23.2 x W18 x H20.1 in) makes it look better than traditional devices with open frames.The generator has a modern look and is easy to use when generating power for fun.Even though the generator is technically considered to “be portable,” it will be very hard to move it by hand because it weighs 100 pounds (in the sense that it is movable).But the lack of maneuverability is made up for by its two wheels and folding handle, which make it easy to move once it’s on the ground.
The following charts show how some of the most important features of the WEN-DF451i compare to other generators with the same power output.
**Fuel efficiency is give in relative percentage, 0 being the lowest and 1 being the highest value. Please see below specification table for actual value.
|Yes, cable not included
|Dual Fuel (gasoline/propane)
|212 cc OHV 4-stroke
|AC: 120V 60 Hz, DC: 12V
|Running amps (@120/240V)
|Peak amps (@120/240V)
|Run time @50% load
|Run time @25% load
|Automatic Voltage Regulator
|1x Duplex 120V 20A (5-20R); 1x 120V 30A (TT-30R)
|1x 12V 8A (cigarette lighter style); 2x 5V USB port (USB-A)
|Power output, fuel level, lifetime run hours, voltage and frequency
|Low oil, overload and output ready
|Approx. dimen. (L x W x H)
|23.2 x 18 x 20.1 in
|Noise (lower limit)
|Low oil, overload and low fuel protection
|Funnel, tool kit, propane hose, and battery
- We compared more than 500 portable generators at 50% load. We found that there is “skewed right” distribution for the difference between 50% load and 25% load and the median comes at 1.43. With this number we converter all the 25% load runtime to 50% load. Same with the propane efficiency, where median is 1.38.
- For some generators where propane runtime was not given, we used NIST 1994 GGE (Gasoline Gallon Equivalent) formula: 5.66 lbs. of propane = 1 gal of gasoline. All propane runtime is for 20 lbs. propane tank (4.7 gallons).
- Unlike many other sites, we actually tried to find out information about each of the above requirements. However, we are human and are therefore capable of the odd oversight or mistake. Please let us know if you spot any missing or erroneous values so that we can fix them.
About the Manufacturer
Nick Anton started WEN Products, an American power tool manufacturer and distributor, in 1951.WEN Products says that its research in random orbital technology contributed to the creation of current chainsaws, soldering tools, and wet sharpeners.The Illinois-based corporation increased the range of power tools that were available through its distribution network, including presses, drills, and of course, power generators.WEN is a distributor, and the majority of the products in its inventory are branded imports from Asian manufacturers.
The WEN DF451i has a warranty that lasts up to 3 years.This warranty may not cover all parts of the generator or may only cover certain parts.Check out WEN’s warranty policies to learn more about the warranty on their generators.You can also call their customer service line at 1-847-429-9263.