5 Quietest 9000 Watt Generators

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Even if you need a lot of power you likely don’t want to wake the whole neighborhood or camping. Discover the quietest 9000 watt generators.

Quietest 9000 watt generators top picks

While many brands do use the 23 feet at 25% load standard for their rated decibels, it is worth noting they can technically choose what they list for this detail.

That being said, in absence of a warehouse of generators, I do mainly use these decibel ratings and customer mentions for this list of the quietest 9000 watt generators anyway.

  1. GENMAX GM9000iE – Quietest 9000 watt generator (62 dBA)
  2. GENMAX GM9000iEDC – Quietest dual fuel 9000 watt generator (62 dBA)
  3. Champion 201067 9000 – Best not so quiet 9000 watt generator (72 dBA)
  4. DuroMax XP9000iH – Dual fuel (68 dBA)
  5. A-iPower SUA9000E (No Inverter) (76 dBA)

As you can see, I would not always go for the quietest 9000 watt generator unless you really want to avoid all the decibels you can.

There is enough of a quality difference that many people will prefer the Champion 201067 9000 even though the rated sound level of 72 dBA is somewhat higher.

How we selected our top picks

The decibel ratings and related customer reviews play a big role in this list of the quietest 9000 watt generators but other features still matter too.

Some of the things I also took into account when making this list of top picks are:

  • Run time, power capacity, outlets, portability, etc.
  • User reviews
  • Anecdotal reviews from experts
  • Price
  • Brand trustability and reputation
  • The performance categories below

If a pick seems interesting click it to see the online prices.

Brand ModelQuiet
Operation
Power
Capacity
Run
Time
THDReliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
GENMAX GM9000iE8.588<5%758.56.5$$$$Check Price
GENMAX GM9000iEDC8.588<5%758.56.5$$$$Check Price
Champion 201067 90006.586.5<3%96.588$$Check Price
DuroMax XP9000iH7.579<5%7886.5$$$$Check Price
A-iPower SUA9000E67.57.5High777.57$Check Price
Quietest 9000 watt generators performance on a score of 10 in important categories*

*Compared to similar generators and sometimes based on customer input

5 Quietest 9000 watt generators in-depth

There will be some people that can make a decision with just the list of top picks and the performance table above.

At the same time, you will likely find the more in-depth reviews of the quietest 9000 watt generators below helpful when choosing the right model for you.

1. GENMAX GM9000iE – Quietest 9000 watt generator (62 dBA)

The GENMAX GM9000iE is the quietest 9000 watt generator I could find but that does not mean this will be the right choice.

This is mainly because the GENMAX is not the best 9000 watt inverter generator out there.

GENMAX GM9000iE

There are a good number of cases where customers initially got a generator that did not function as desired and cases where this started happening relatively soon.

Additionally, even customers that are still within the one year warranty time frame find it difficult to get a hold of support to get the issue resolved.

Pros

  • Quietest 9000 watt generator with 62 dBA
  • GENMAX GM9000iE offers 9000 starting watts, 7600 running watts, 31.7/50 amps, and 240 volts
  • Nice run time of 10 hours at 50% load
  • Less than 5% THD
  • Weight of 233.7 lb (106 kg)
  • Electric and remote start
  • Four GFCI outlets
  • CO sensor
  • Parallel capability
  • 1 year limited warranty

Cons

  • Relatively short warranty
  • Somewhat pricier
  • Decent number of cases where customers got a model that did not work as desired or early wear and tear

The things above make it so you likely want to choose a different 9000 watt generator.

However, it is also worth mentioning there are still a good amount of people who are happy with the GENMAX GM9000iE, its relatively quiet operation, and its solid features.

Two details that positively stand out are the long run time of 10 hours at 50% load and parallel capability.

These allow you to enjoy serious amounts of low THD power for long amounts of time before having to refuel your generator(s).

Brand ModelQuiet
Operation
Power
Capacity
Run
Time
THDReliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
GENMAX GM9000iE8.588<5%758.56.5$$$$Check Price
GENMAX GM9000iE performance on a score of 10 compared to similar alternatives

2. GENMAX GM9000iEDC – Quietest dual fuel 9000 watt (62 dBA)

Many of the quietest 9000 watt generators (and other portable models) are only able to convert gasoline into electricity.

That being said, there are also generators like the GENMAX GM9000iEDC that have a dual fuel function which means they can also run on propane (LPG).

GENMAX GM9000iEDC

This offers you the benefits of both types of fuel and gives you more flexibility which can be useful for home backup power or situations where gasoline is not always available.

One thing you do want to keep in mind is that the dual fuel version of the 9000 watt GENMAX does cost a decent amount more than the gasoline-only version.

Pros

  • Quietest dual fuel 9000 watt generator with 62 dBA
  • GENMAX GM9000iE offers 9000 starting watts, 7600 running watts, 31.7/50 amps, and 240 volts (gasoline)
  • Dual fuel so can run on propane (LPG) too
  • Nice run time of 10 hours at 50% load
  • Less than 5% THD
  • Weight of 233.7 lb (106 kg)
  • Electric and remote start
  • Four GFCI outlets
  • CO sensor
  • Parallel capability
  • 1 year limited warranty

Cons

  • Relatively short warranty
  • Pricier than many other quiet 9000 watt generators
  • Decent number of cases where customers got a model that did not work as desired or early wear and tear

Additionally, duel fuel generators tend to offer less power when running on propane.

Besides the dual fuel function and higher price, the GENMAX GM9000iEDC is basically the same as the quietest 9000 watt generator above.

That means people who don’t mind a few extra decibels likely want to invest in other generators that are more promising in terms of quality.

This applies to the dual fuel 9000 watt generator category too. Many people will like the DuroMax XP9000iH just a bit more.

Brand ModelQuiet
Operation
Power
Capacity
Run
Time
THDReliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
GENMAX GM9000iEDC8.588<5%758.56.5$$$$Check Price
GENMAX GM9000iEDC performance on a score of 10 compared to similar alternatives

3. Champion 201067 9000 – Best not so quiet 9000 watt (72 dBA)

In some generator categories, the lists of top picks are relatively close.

However, in the case of the best 9000 watt generators, the Champion 201067 9000 is a relatively straightforward choice.

In the list of the quietest 9000 watt generators, it is worth mentioning the GENMAX models first due to their low decibel ratings.

Pros

  • Champion 201067 9000 offers 9000 starting watts, 7250 running watts, 37.5/50 amps, and 240 volts
  • Run time of 10.5 hours at 25% load
  • Less than 3% THD
  • Electric start
  • CO sensor
  • Four GFCI outlets
  • Weight of 152.2 lb (69 kg)
  • Relatively positive customer reviews
  • 3 years limited residential and 270 days limited commercial warranties
  • A lot of customers
  • Budget-friendly for a 9000 watt inverter generator

Cons

  • Fuel efficiency and run time are not the most impressive
  • Noise levels of 72 dBA are reasonable but also not really quiet

At the same time, 72 dBA is still “only” about the volume of a loud washing machine or vacuum cleaner.

In simpler words, the difference in expected quality makes it so many people will prefer the Champion 201067 9000 over more silent models.

Besides the positive customer reviews, this generator has nice warranties, low THD, and a relatively budget-friendly price.

This reliability can be extra valuable for people who are looking for a quiet 9000 watt generator as home backup power.

Brand ModelQuiet
Operation
Power
Capacity
Run
Time
THDReliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
Champion 201067 90006.586.5<3%96.588$$Check Price
Champion 201067 9000 performance on a score of 10 compared to similar alternatives

4. DuroMax XP9000iH (68 dBA)

The DuroMax XP9000iH is a dual fuel 9000 watt generator that is somewhat more reliable but slightly louder than the GENMAX GM9000iEDC.

DuroMax XP9000iH

At the same time, this powerful generator from DuroMax is not perfect either.

There are some cases where customers mention their generator starts functioning suboptimally.

Additionally, the generator is not always able to reach the noted running watts.

Pros

  • DuroMax XP9000iH offers 9000 starting watts, 7600 running watts, 30 amps, and 240 volts (gasoline)
  • Dual fuel so can run on propane (LPG) too
  • Noise levels of 68 dB
  • Nice run time of 20 hours at 25% load
  • Less than 5% THD
  • Electric and remote start
  • Four GFCI outlets
  • CO sensor
  • Weight of 237 lb (107.5 kg)
  • 3 years limited residential and 1 year limited commercial warranties
  • A lot of customers

Cons

  • Pricier than many other quiet 9000 watt generators
  • You may need 30+ amps
  • Some cases of early technical issues
  • A few cases where the generator does not offer the running watts mentioned

That being said, potentially with some outlet adapters, the DuroMax XP9000iH is likely the better quiet dual fuel generator for home backup power.

For other situations like RV camping or food trucks, deciding between the GENMAX and DuroMax becomes a case of comparing sound levels, warranties, price. etc.

One thing that really stands out in the DuroMax XP9000iH is its run time of 20 hours at 25% load on a full tank of gas.

This allows you to enjoy your electricity for longer before having to refuel.

Brand ModelQuiet
Operation
Power
Capacity
Run
Time
THDReliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
DuroMax XP9000iH7.579<5%7886.5$$$$Check Price
DuroMax XP9000iH performance on a score of 10 compared to similar alternatives

5. A-iPower SUA9000E (76 dBA)

The A-iPower SUA9000E is mostly on the list because there are not that many generators with 9000 starting watts.

76 dBA is somewhat standard for generators with this much power but if you are interested in quiet models this will likely be a bit too loud for you.

On top of that, the A-iPower SUA9000E is not an inverter generator which means you will not be able to safely run sensitive electronics on it (unless you have your own inverter).

It is also worth mentioning that this 9000 watt generator does not have a lot of customers yet.

Pros

  • A-iPower SUA9000E offers 9000 starting watts, 7250 running watts, 30 amps, and 240 volts
  • Run time of 8.5 hours at 50% load
  • Weight of 201.7 lb (91.5 kg)
  • Electric start
  • Two GFCI outlets
  • 2 years limited residential and 1 year limited commercial warranties
  • Budget-friendly

Cons

  • Noise levels of 76 dBA are somewhat louder
  • Not a lot of customers yet
  • THD is likely too high for sensitive electronics

This is a downside because there are generators where customer reviews uncover unexpected downsides of the machines.

Besides in price, the A-iPower SUA9000E does not really have any areas where it positively stands out.

The result of all of these details is that you will likely prefer one of the actual quiet and/or quality 9000 watt generators over the A-iPower SUA9000E.

Brand ModelQuiet
Operation
Power
Capacity
Run
Time
THDReliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
A-iPower SUA9000E67.57.5High777.57$Check Price
A-iPower SUA9000E performance on a score of 10 compared to similar alternatives

Related posts:

What is the quietest 9000 watt generator?

The quietest 9000 watt generator I could find is the GENMAX GM9000iE.

That being said, because this generator does have its issues, I would often instead recommend the Champion 201067 9000 even though it comes with more decibels.

GENMAX GM9000iE
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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.