5 Best 4500 Watt Inverter Generators

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4500 watt inverter generators can power a lot without costing as much as stronger models. Discover the best models on the market.

  1. Best overall and quietest 4500 watt inverter generator: Westinghouse iGen4500
  2. Most reliable 4500 watt inverter generator: Champion 200988 4500
  3. Best dual fuel 4500 watt inverter generator: Westinghouse iGen4500DF
  4. Best cheap 4500 watt inverter generator: WEN 56455i
  5. Longest run time 4500 watt generator: Firman W03661OF

You can choose the 4500 watt inverter generator that aligns best with your personal preferences and needs above.

That means generators lower on the list will sometimes be better for you personally.

Brand ModelPower
Capacity
Run
Time
Quiet
Operation
Reliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
Westinghouse iGen450099108787$$Check Price
Champion 200988 45007789887$$$Check Price
Westinghouse iGen4500DF99108.5787$$$Check Price
WEN 56455i7897.59.587$Check Price
Firman W03661OF8106747.58$$$Check Price
Best 4500 watt inverter generators performance on a score of 10 in important categories*

*Compared to similar generators and sometimes based on customer input

1. Westinghouse iGen4500

The Westinghouse iGen 4500 is the best 4500 watt generator thanks to its great combination of quality features, reasonable price, and positive customers.

Westinghouse iGen4500

A benefit of the Westinghouse iGen 4500 is its low rated noise level of 52 dBA. This type of measurement is not standardized in the generator industry but is still promising.

The Westinghouse iGen 4500 can be used for your RV on relatively busy camping sites thanks to its low noise levels.

Pros

  • Westinghouse iGen4500 offers 4500 starting watts, 3700 running watts, 30 amps, and 120 volts.
  • Quietest 4500 watt generator with rated 52 dBA
  • Long run time of 18 hours at 25% load
  • Less than 3% THD
  • A lot of performance tracking metrics
  • Optional remote start or CO sensor
  • Weight of 104.7 lbs (47.5 kg)
  • Relatively positive customer reviews
  • 3 years limited residential and 1 year limited commercial warranties
  • A lot of customers
  • Budget-friendly

Cons

  • Navigating bumpy terrain can be inconvenient
  • Some customers find changing the oil challenging

Another benefit of the Westinghouse iGen4500 is the number of performance tracking metrics you can find on the display.

This makes it easier to get an idea of when it will be time to refill and how much power you are actually using.

One downside of the Westinghouse iGen4500 is that changing the oil of this 4500 watt inverter generator can be challenging.

That being said, the Westinghouse iGen4500 will likely still be the best option for your situation. Especially at this price point.

Brand ModelPower
Capacity
Run
Time
Quiet
Operation
Reliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
Westinghouse iGen450099108787$$Check Price
Westinghouse iGen4500 performance on a score of 10 compared to similar alternatives

2. Champion 200988 4500

Champion 200988 4500

The Champion 200988 4500 is the most reliable 4500 watt generator due to the extra good positivity of the customer reviews and experiences.

Besides a few exceptional cases of technical difficulties which are somewhat normal, customers tend to be very positive about the Champion 200988 4500.

The Westinghouse iGen4500 does relatively well in this area too and the Champion 200988 4500 is not perfect either, but this option does just a bit better.

Next, with the specifications provided, you can estimate that this generator gets about 5.326 kWh out of a gallon of fuel at 25% load.

In combination with the option to also use propane, the Champion 200988 4500 can be a good choice as home backup power for a few medium appliances in case of a power outage.

Pros

  • Champion 200988 4500 offers 4500 starting watts, 3500 running watts, 30 amps, and 120 volts.
  • Dual fuel (gasoline and propane)
  • Relatively low noise levels with 61 dBA
  • Nice run time of 14 hours at 25% load
  • Nice fuel efficiency
  • Less than 3% THD
  • Weight of 95 lbs (43.1 kg)
  • Very positive customer reviews
  • 3 years limited residential and 270 days limited commercial warranties
  • A lot of customers

Cons

  • Navigating bumpy terrain can be inconvenient
  • A few exceptional cases of technical difficulties

As you can expect from 4500 watt inverter generators, this model from Champion has a low THD (less than 3%) which allows you to power more sensitive devices too.

The rated noise levels of the Champion 200988 4500 are not as good as the top pick at 61 dBA. However, this is similar to a conversation so your experience should still be good.

The Champion 200986 4500 can be a good alternative if you don’t necessarily want the dual fuel option, want to save some money, but still want the more positive reviews and fuel efficiency.

That being said, the dual fuel option does make this 4500 watt generator a bit more reliable thanks to the fuel flexibility.

Brand ModelPower
Capacity
Run
Time
Quiet
Operation
Reliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
Champion 200988 45007789887$$$Check Price
Champion 200988 4500 performance on a score of 10 compared to similar alternatives

3. Westinghouse iGen4500DF

Westinghouse iGen4500DF

The Westinghouse iGen4500DF is the best 4500 watt dual fuel inverter generator since it is basically the dual fuel version of the top pick.

One additional difference is that the Westinghouse iGen4500DF seems to lack a remote start option.

The Westinghouse iGen4500DF is good for you if you want to be able to run your generator on different types of fuel and want to use your generator in low-risk situations.

Some examples of low-risk situations are tailgating, camping, and DIY sessions. In more serious situations you may prefer the tiny extra reliability of the Champion 200988 4500.

Pros

  • Westinghouse iGen4500DF offers 4500 starting watts, 3700 running watts, 30 amps, and 120 volts.
  • Dual fuel (gasoline and propane)
  • Quietest 4500 watt generator with rated 52 dBA
  • Long run time of 18 hours at 25% load
  • Less than 3% THD
  • A lot of performance tracking metrics
  • Optional CO sensor
  • Weight of 104.7 lbs (47.5 kg)
  • Relatively positive customer reviews
  • 3 years limited residential and 1 year limited commercial warranties
  • A lot of customers
  • Budget-friendly

Cons

  • Navigating bumpy terrain can be inconvenient
  • Some customers find changing the oil challenging

Similar to the top pick, it is impressive that this model can handle what a 4500 watt generator can run at 25% load for 18 hours.

Additionally, the relatively in-depth performance tracking metrics can be especially useful for a dual fuel generator like the Westinghouse iGen4500DF.

This is because the capabilities you get when running on propane are typically different from the gasoline “setting”.

In short, the Westinghouse iGen4500DF is a more budget-friendly way to run different fuel types.

Especially for situations like RV camping, tailgating, and potentially even food trucks.

Brand ModelPower
Capacity
Run
Time
Quiet
Operation
Reliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
Westinghouse iGen4500DF99108.5787$$$Check Price
Westinghouse iGen4500DF performance on a score of 10 compared to similar alternatives

4. WEN 56455i

WEN 56455i

The WEN 56455i is the best cheap quality 4500 watt inverter generator at the time of research. Keep in mind that prices can change over time.

The main downside that comes with this budget-friendly price is that the WEN 56455i does not have a lot of customers yet.

This is relevant because some generators look good on paper but do not deliver that well on their promises.

In the case of WEN generators customers tend to be happy with their investments but the number of customers is still worth mentioning.

Pros

  • WEN 56455i offers 4500 starting watts, 3500 running watts, 29 amps, and 120 volts.
  • Relatively low noise levels with 57 dB
  • Nice run time of 8.5 hours at 50% load
  • Good fuel efficiency
  • Less than 1.2% THD
  • Weight of 99.2 lb (45 kg)
  • 2 years limited residential and 90 days limited commercial warranties
  • Budget-friendly

Cons

  • Navigating bumpy terrain can be inconvenient
  • Relatively short commercial warranty
  • Not a lot of customers yet

While the comparison with the numbers for different loads is far from perfect, it is also worth mentioning that the WEN 56455i seems to have good fuel efficiency.

With the running watts and run time you can estimate that this 4500 watt inverter generator can produce about 6.761 kWh out of one gallon of fuel while running at 50% load.

Food truck owners and other people who want to power their businesses do want to keep the short 90 days limited commercial warranty in mind.

That being said, the WEN 56455i is still a promising inverter generator for the money for people who want relatively budget-friendly power and don’t mind the low number of customer reviews.

Brand ModelPower
Capacity
Run
Time
Quiet
Operation
Reliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
WEN 56455i7897.59.587$Check Price
WEN 56455i performance on a score of 10 compared to similar alternatives

5. Firman W03661OF

The Firman W03661OF is a good 4500 watt generator if you want to run your machine for a long time without refueling.

While the other options perform well in this area too, you could prefer the run time of 22 hours at 25% load of this Firman generator for things like events or your food truck.

If these commercial situations apply to you, you do want to keep the relatively short 90 days limited commercial warranty in mind.

Additionally, the Firman W03661OF is relatively loud with its noise level rating of 69 dB. You may need to take precautions regarding this.

Pros

  • Firman W03661OF offers 4500 starting watts, 3500 running watts, 30.4 amps, and 120 volts.
  • Bigger wheels make navigation a bit easier
  • Nice run time of 22 hours at 25% load
  • Low THD of 3% at full load
  • CO sensor
  • Light weight of 106 lb (48.1 kg)
  • 3 years limited residential and 180 days limited commercial warranties

Cons

  • Relatively loud with the rated 69 dB at 25% load
  • Relatively low fuel efficiency
  • Relatively short commercial warranty
  • Not a lot of customers yet

Customers of Firman generators tend to be positive about the brand but you want to keep in mind that this inverter generator does not have a lot of customers yet.

In combination with the somewhat higher price, this makes the Firman W03661OF a bit more of a risky pick compared to the other 4500 watt inverter generators on the list.

So if you really like the run time and easier navigation due to the bigger wheels of the Firman W03661OF, you could consider this option.

At the same time, it should be clear that most people will prefer one of the previous generators.

Brand ModelPower
Capacity
Run
Time
Quiet
Operation
Reliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
Firman W03661OF8106747.58$$$Check Price
Firman W03661OF performance on a score of 10 compared to similar alternatives

What to pay attention to in a 4500 watt generator?

The things to pay attention to in a 4500 watt generator are:

  • Power capacity
  • Outlets
  • Portability
  • Run time
  • Noise levels
  • THD levels
  • Fuel consumption
  • User reviews
  • Anecdotal reviews from experts
  • Price
  • Brand trustability and reputation

To choose a 4500 watt generator you want to think about what you want in these areas and find a machine that aligns the best with your situation.

What is the best 4500 watt generator?

The best 4500 watt generator is the Westinghouse iGen4500 thanks to its solid features, positive customer reviews, and reasonable price.

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Author:

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.