WEN 4500 Inverter Generator Review (56455i)

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Figure out whether the WEN 4500 inverter generator is suited for your personal situation and what alternatives there are.

WEN 4500 generator review in short

The WEN 4500 generator is a promising 4500 watt inverter at a budget-friendly price.

Two potential downsides are the small number of customer reviews and the short commercial warranty.

If you don’t mind these, the WEN 4500 generator can be a great choice.

It is worth noting that people who have specific preferences like really quiet operation may prefer certain other good 4500 watt generators.


  • Good fuel efficiency
  • Long run time
  • Relatively quiet operation
  • Budget-friendly 4500 watt inverter generator


  • Not enough customers to prove quality at scale
  • Short commercial warranty

Some of the best uses for the WEN 4500 generator include:

  • RV or regular camping
  • Tailgating
  • Small businesses like food trucks
  • Running small to medium power tools

WEN 4500 generator performance in important categories

On top of the mini review, pros, cons, and uses of the WEN 4500 inverter generator aka the 56455i, it can be helpful to see how this model performs in different categories.

Performance CategoryWEN 4500
Generator Score*
Performance CategoryWEN 4500
Generator Score*
Power Capacity7Fuel Efficiency9.5
Run Time9Ease Of Use8
Quiet Operation9Portability7
THD<1.2%Price Category$
Reliability Reputation7.5Overall Expert Rating9
Current PriceCheck Price
WEN 4500 generator performance on a score of 10 compared to other generators*

Individual reviews compare the specific model to portable generators in general and sometimes scores are based on customer input

WEN 4500 generator key features

All of the details of the WEN 4500 generator can be a lot to take in.

Luckily, you can also get a relatively good idea of whether this generator is right for you by looking at a few key features.

FeatureWEN 4500
Generator Detail
Fuel TypeGasoline
Starting Watts4500 Starting Watts
Running Watts3500 Running Watts
Run Time @25% Load8.5 Hours
Noise Levels57 dB
Outlets(1) 120V 30A TT30R RV Outlet,
(1) Duplex Of 120V 20A 5-20R Outlets,
(2) USB Ports, (1) 12 VDC Outlet
THDLess Than 1.2%
Warranty*2 Years Limited Residential
And 90 Days Limited Commercial
Price Category**$
Check Current Price
WEN 4500 generator key features

*Warranties can vary from seller to seller

**Price category at the time of writing

What can the WEN 4500 generator run?

Even with the number of watts, amps, and volts, it is not always straightforward to know the actual device combinations the WEN 4500 generator can run.

Some of the bigger machines this generator can run individually include a window air conditioner (15,000 BTU), a table saw, or a 1 HP air compressor.

You can also divide the 4500 starting watts and 3500 running watts over multiple devices.

An example of a combination the WEN 4500 generator should be able to run is a refrigerator, coffee maker, flat screen TV, and dishwasher.

Even better than these examples is looking up the power needs of the devices you want to run and figuring out whether these fit in the power capacity of a 4500 watt generator.

WEN 4500 generator customer reviews insights

Similar to other products, generators are not always good as their features suggest.

To make sure the WEN 4500 inverter generator is high-quality, you also want to take a look at the reviews of the customers before you.

While these are positive for now, the WEN 56455i unfortunately does not have that many customer reviews at the time of writing.

One thing that is worth mentioning is that customers tend to be relatively positive about other generators from the WEN brand.

This does not tell you how long the WEN 4500 will last but does give some peace of mind.

WEN 4500 generator alternatives

The WEN 4500 generator can be a good choice but you may also want to know about other inverters that have more customers and/or stand out in other areas.

If you want a high-quality 4500 watt inverter with more customer reviews, a quieter rating, and still a reasonable price, the Westinghouse iGen4500 could be the right choice for you.

You can also consider the Champion 200988 4500 DF which is pricier and slightly louder but also dual fuel and better in terms of reliability reputation.

Is the WEN 4500 generator worth it?

If you don’t mind the small number of customer reviews and the short commercial warranty, the WEN 4500 inverter generator can definitely be worth the investment.

This is one of your best bets if you want to run small to medium electronics at a relatively budget-friendly price.

While these things still apply, it is worth mentioning that there are also alternatives to the WEN 4500 generator that are better in terms of the amount of reviews, noise levels, and/or reliability.

Other WEN 4500 generator specifications

Before investing in the WEN 4500 generator or one of its alternatives you may also want to see the specifications I did not mention in the review yet.

You can also check out the WEN 4500 generator manual for even more detailed information.

SpecificationWEN 4500
Generator Detail
Voltage120 Volts
Fuel Tank Capacity2.2 Gallons
Fuel Efficiency
(kWh Per Gallon)
Outlet CoversNo
Oil Type10W-30 For 0°F to 40°F
30W For 40+°F
Or Synthetic 5W-30
Engine Displacement212cc
Recoil Pull StartYes
Electric StartYes
Low Oil ShutdownYes
Fully Enclosed DesignYes
AC Frequency60 Hz
Remote StartNo
Digital Smart LCD
Hour MeterYes
Fuel GaugeYes
Wattage MeterSimplified Version
Run Time RemainingNot Mentioned
Engine Type4 Stroke
Generator Operation
Parallel ReadyYes
Country Of OriginVietnam
Dimensions23.2″ L x 18″ W x 20.1″ H
Weight99.2 lbs (45 kg)
Check Current Price
Other WEN 4500 generator specifications

WEN 4500 generator FAQ

How long will a WEN 4500 generator run?

A WEN 4500 generator will run for about 8.5 hours at 50% load on a full fuel tank.

How much oil does a WEN 4500 generator take?

The WEN 4500 generator has an oil capacity of 18.6 fluid ounces which is about 0.55 liters.

How loud is the WEN 4500 generator?

The WEN 4500 generator is about 57 decibels loud.

Ratings like this are typically measured at 25% load and 23 feet (7 meters) away.

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Mats is the founder and head editor of Generator Decision. With a combination of critical thinking, tireless research, and a healthy interest in electronics he helps people find the right generators and how to use these. At this point in the journey, Mats has done research on hundreds of portable generators.