4 Quietest 4000 Watt Generators (& Bonus Option)

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Discover the quietest 4000 watt generators so you can get a nice amount of power while keeping the noise levels down.

  1. WEN 56400iX – Quietest 4000 watt generator (57 dBA)
  2. Pulsar PGD40iSCO – Budget-friendly quiet 4000 watt generator (59 dB)
  3. A-iPower SUA4300i (63 dBA, 4300 peak watts)
  4. Champion 200954 (64 dBA, 4250 peak watts)
  5. Bonus: Westinghouse iGen4500 (52 dBA, 4500 peak watts)

For this list, I mainly stuck to generators between 4000 and 4400 peak watts as you would expect.

However, I also included a solid quiet bonus generator with 4500 peak watts that is often a great choice.

Quiet 4000 watt generators lower on the list could still be the best for your preferences and needs.

Brand ModelQuiet
Operation
Power
Capacity
Run
Time
THDReliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
WEN 56400iX98.57.5<1.2%7.5988$$Check Price
Pulsar PGD40iSCO8.58.55.5Clean
THD
88.57.59.5$Check Price
A-iPower SUA4300i895.5<3%7789$$Check Price
Champion 200954899.5<3%8.58.57.58$$$Check Price
Westinghouse iGen4500109.58.5<3%9.58.58.58$$$Check Price
Quietest 4000 watt generators performance on a score of 10 in important categories*

*Compared to similar generators and sometimes based on customer input

1. WEN 56400iX

The WEN 56400iX is the quietest 4000 watt generator with noise levels of 57 dBA (typically measured at 25% load and 23 feet away).

WEN 56400iX

In combination with the run time of 8.5 hours at 50% load, you could use the WEN 56400iX for things like running a refrigerator and/or freezer overnight.

Another benefit of the WEN 56400iX is that it has an electric start.

This makes getting the quiet 4000 watt generator going more convenient for elderly individuals or just people who don’t like the standard recoil start.

Pros

  • Quietest 4000 watt generator with noise levels of 57 dBA
  • WEN 56400iX offers 4000 starting watts, 3200 running watts, 30 amps, and 120 volts
  • Parallel capability
  • Nice run time of 8.5 hours at 50% load
  • Good fuel efficiency
  • Less than 1.2% THD
  • Has electric start
  • Has a CO sensor
  • Weight of 99.2 lb (45 kg)
  • 2 years limited residential and 90 days limited commercial warranties

Cons

  • Relatively short commercial warranty
  • Not that many customers yet
  • Moving the generator over uneven terrain can be inconvenient

Something people with food trucks, mobile detailing operations, outdoor DJ sets, or other business purposes do want to keep in mind is the short commercial warranty.

Additionally, the WEN 56400iX does not have that many customers yet.

Customers tend to like WEN generators but there are also a few models that have unexpectedly high rates of technical issues.

With the reasonable price, low noise levels, and nice features, you could still give the WEN 56400iX a chance.

On the other hand, if you don’t mind going down a few watts, the WEN 56380i can be a more proven option.

Brand ModelQuiet
Operation
Power
Capacity
Run
Time
THDReliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
WEN 56400iX98.57.5<1.2%7.5988$$Check Price
WEN 56400iX performance on a score of 10 compared to similar alternatives

2. Pulsar PGD40iSCO

The Pulsar PGD40iSCO is a few decibels louder than the WEN 56400iX at 59 dB but its relatively budget-friendly price and solid features could make this quiet 4000 watt generator the right one for you.

Pulsar PGD40iSCO

Something you do want to know first is that the 4.5-hour run time at 50% load is relatively short.

This is definitely not enough to run something like an RV air conditioning or similar medium devices throughout the night.

Additionally, there are a few cases of suboptimal performance like the Pulsar PGD40iSCO not reaching the listed power although these tend to be exceptions.

Pros

  • Relatively low noise levels of 59 dB
  • Pulsar PGD40iSCO offers 4000 starting watts, 3200 running watts, 30 amps, and 120 volts
  • Parallel capability
  • Clean inverter power is suited for sensitive electronics
  • Has a CO sensor
  • Light weight of 46 lb (20.9 kg)
  • 3 years limited warranty
  • Budget-friendly

Cons

  • Run time of 4.5 hours at 50% load is relatively short
  • A few exceptional cases of technical issues

On the other hand, the light weight of the Pulsar PGD40iSCO positively stands out.

The 46 pounds should be relatively easy to take out of your car, camper, or storage room and get in and out of position.

You may also like the CO sensor which reduces the risk of too much carbon monoxide buildup around the generator.

Besides these things, the Pulsar PGD40iSCO is rather standard which is good for a budget-friendly yet quiet 4000 watt generator like this.

Brand ModelQuiet
Operation
Power
Capacity
Run
Time
THDReliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
Pulsar PGD40iSCO8.58.55.5Clean
THD
88.57.59.5$Check Price
Pulsar PGD40iSCO performance on a score of 10 compared to similar alternatives

3. A-iPower SUA4300i

The A-iPower SUA4300i is a tiny amount louder than the previous option with a rating of 63 dBA.

However, considering a regular conversation is around 60 decibels, it is still fair to say the A-iPower SUA4300i offers a nice amount of power and relatively silent operation.

A-iPower SUA4300i

Something that positively stands out in this option is that there is also the A-iPower SUA4300iD which is basically the dual fuel version.

Being able to run on propane can be helpful for situations like power outages and off-grid living thanks to the better storability of this fuel type.

Pros

  • Relatively low noise levels of 63 dBA
  • A-iPower SUA4300i offers 4300 starting watts, 3450 running watts, 30 amps, and 240 volts
  • Parallel capability
  • Dual fuel version available too
  • Less than 3% THD
  • Has a CO sensor
  • Light weight of 52.9 lb (24 kg)
  • 3 years limited residential and 1 year limited commercial warranties

Cons

  • Run time of 7.5 hours at 50% load is relatively short
  • Not that many customers yet

One downside of these options is that their run time of 7.5 hours at 50% load is relatively short compared to many of the quietest 4000 watt generators.

Additionally, the low number of customer reviews makes it so you are not entirely certain about whether this is one of the A-iPower generators with lacking reliability.

In practice, you will likely prefer the Pulsar PGD40iSCO if you have more than enough with a quiet 4000 watt generator that just runs on gasoline.

On the other hand, you will not find (m)any other dual fuel inverter generators around the power capacity and reasonable price of the A-iPower SUA4300iD.

Brand ModelQuiet
Operation
Power
Capacity
Run
Time
THDReliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
A-iPower SUA4300i895.5<3%7789$$Check Price
A-iPower SUA4300i performance on a score of 10 compared to similar alternatives

4. Champion 200954 4250

As some customers note, the Champion 200954 4250 is not the quietest 4000+ watt generator but 64 dBA is still nice for this power capacity.

Champion 200954

If you find the noise levels acceptable, the long run time of 22 hours at 25% load makes the Champion 200954 great for running an RV AC, refrigerator, or freezer overnight.

You could also go for the Champion 200977 which is basically the dual version instead.

This may be slightly pricier but could be worth the benefits of being able to run on propane.

Pros

  • Reasonable noise levels of 64 dBA
  • Champion 200977 offers 4250 starting watts, 3500 running watts, 30 amps, and 120 volts
  • Parallel capability
  • Dual fuel version available too
  • Long run time of 22 hours at 25% load
  • Less than 3% THD
  • Weight of 79 lb (35.8 kg)
  • Relatively positive customer reviews
  • 3 years limited residential and 270 days limited commercial warranties
  • A lot of customers

Cons

  • No wheels so moving the generator can be challenging
  • A few cases of technical issues
  • Some mentions of suboptimal noise levels

If you do want to go for the gasoline-only Champion 200954, you need to know that there are a few cases where customers have technical issues.

Champion support tends to resolve these issues sooner or later but in case they happen, this would require some extra time and effort.

You also want to know that the Champion 200954 does not come with a wheel kit. This extra investment may be necessary if you don’t see yourself lifting the 79 pounds.

Overall the Champion 200954 does have the occasional technical issue and not the quietest noise levels but it is still a relatively reliable 4000+ watt generator.

In turn, this generator or to a larger extent the dual fuel version could still be the right investment for situations like backup power or off-grid living.

Brand ModelQuiet
Operation
Power
Capacity
Run
Time
THDReliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
Champion 200954899.5<3%8.58.57.58$$$Check Price
Champion 200954 performance on a score of 10 compared to similar alternatives

Bonus: Westinghouse iGen4500

The first thing to note is that the Westinghouse iGen4500 is not an actual 4000 peak watt generator.

However, because the 4500 peak watts are close, the noise levels of 52 dBA are low, and the generator is good, you do want to know that this option exists.

Westinghouse iGen4500

Before going into the benefits, the two main downsides of going for the Westinghouse iGen4500 instead of the quietest 4000 watt generators are the price and weight.

That being said, since the Westinghouse iGen4500 is still relatively good in these areas, its other good points could make it worth the investment.

Pros

  • Westinghouse iGen4500 offers 4500 starting watts, 3700 running watts, 30 amps, and 120 volts
  • Parallel capability
  • Relatively low noise levels of 52 dBA
  • Long run time of 18 hours at 25% load
  • Less than 3% THD
  • A lot of performance tracking metrics
  • Has electric start
  • 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

Cons

  • Some customers find changing the oil challenging
  • Pricier than many quiet 4000 watt generators
  • Moving the generator over uneven terrain can be inconvenient

For example, the long run time of 18 hours at 25% load makes it so you can enjoy the clean THD inverter power of the Westinghouse iGen4500 without too many refueling interruptions.

The electric start and optional remote start also make using this quiet 4500 watt generator relatively convenient.

With these, you don’t even have to leave your RV, camper, or house to start the power source for your AC, TV, refrigerator, or other devices.

Additionally, the overall positivity of the reviews and the small number of mentions of technical issues imply the Westinghouse iGen4500 is a reliable generator.

In short, if you have the budget for it and don’t mind rolling around the few extra pounds, the Westinghouse iGen4500 is likely worth the extra investment.

Brand ModelQuiet
Operation
Power
Capacity
Run
Time
THDReliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
Westinghouse iGen4500109.58.5<3%9.58.58.58$$$Check Price
Westinghouse iGen4500 performance on a score of 10 compared to similar alternatives

What is the noise level of a 4000 watt generator?

4000 watt inverter generators typically have noise levels of around 58 to 64 dBA. Non-inverter 4000 watt generators are often around 68 dBA loud.

What is the quietest 4000 watt generator?

The quietest 4000 peak watt generator is the WEN 56400iX with a noise level rating of 57 dBA (typically measure at 25% load and 23 feet away).

Additionally, if you don’t mind investing a bit more, Westinghouse iGen4500 is a quiet alternative (52 dBA) that offers 4500 peak watts and good reliability.

WEN 56400iX
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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.