5 Largest Inverter Generators Available

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Some people link inverter generators to small camping models but the largest options available prove the opposite.

One thing to note about this list is that I do assume you are looking for a somewhat portable consumer inverter generator that is available online.

Industrial-sized and/or offline inverter generators are not included.

  1. AIVOLT 10000 – Largest dual fuel inverter generator (10000 starting watts)
  2. Predator 9500 – 9500/7600 starting/running watts inverter generator
  3. Pulsar PGD95BISCO – Dual fuel 9500 starting watts inverter generator
  4. GENMAX GM9000iE – 9000/7600 starting/running watts inverter generator
  5. DuroMax XP9000iH – Dual fuel 9000 starting watts inverter generator

Keep in mind that smaller inverter generators could be powerful enough for your situation too. These could save you some money.

Brand ModelPower
Capacity
Run
Time
Quiet
Operation
THDReliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
AIVOLT 100001098.5<3%7.58.58.54.5$$$Check Price
Predator 95009.597.5Clean
THD
8.587.55.5$$$Check Price
Pulsar PGD95BISCO988.5Clean
THD
7.5785$$$Check Price
GENMAX GM9000iE988.5<5%75.58.56$$Check Price
DuroMax XP9000iH99.57.5<5%78.586$$$Check Price
Largest inverter generators performance on a score of 10 in important categories*

*Compared to similar generators and sometimes based on customer input

1. AIVOLT 10000

The AIVOLT 10000 is the largest dual fuel inverter generator I could find with an impressive 10000 starting watts and 8000 running watts.

AIVOLT 10000

Thanks to this dual fuel feature you can also convert propane (LPG) into clean, low THD power.

Since propane generally stores longer than gasoline, the AIVOLT 10000 can be useful for purposes like power outage backup or off-grid living where gasoline is not always convenient.

Another detail that positively stands out in the AIVOLT 10000 watt inverter generator is its 50 amp outlet.

Pros

  • AIVOLT 10000 offers 10000 starting watts, 8000 running watts, 50 amps, and 240 volts (gasoline)
  • Parallel capability
  • Dual fuel feature so you can run on propane (LPG) too
  • Relatively low noise levels of 61 dBA
  • Good run time of 19 hours at 25% load
  • Less than 3% THD
  • Has remote and electric start
  • Four GFCI outlets
  • 2 years limited warranty

Cons

  • Not the most proven generator brand
  • You likely need some help moving the weight of 299 lb (135.6 kg)

You would expect this 50 amp outlet to be standard for large inverter generators but there are a decent number of exceptions to this.

This 50 amp outlet can make connecting the generator to things like houses and RVs easier (but still keep safety in mind) and allows you to get more power out of a single outlet.

The main downside of the AIVOLT 10000 and the reason that it is not on the list of the best large inverter generators is that this brand is not that proven yet.

So far their customer reviews look decent/good but you may need more than this before you rely on this inverter generator for important purposes.

In short, the AIVOLT 10000 looks good for now but whether you want to consider it depends on details like your power needs and risk tolerance.

Brand ModelPower
Capacity
Run
Time
Quiet
Operation
THDReliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
AIVOLT 100001098.5<3%7.58.58.54.5$$$Check Price
AIVOLT 10000 performance on a score of 10 compared to similar alternatives

2. Predator 9500

As mentioned above, not all the largest inverter generators have 50 amp outlets and this Predator 9500 is one example.

In turn, you will need to use multiple outlets to make get all the 9500 starting and 7600 running watts out of this generator.

Something else to note is that Predator generators generally do not have the best durability reputation.

There are definitely customers that are able to use their Predator 9500 for many hours but you may be somewhat hesitant to rely on this model for home backup power for essentials.

Pros

  • Predator 9500 offers 9500 starting watts, 7600 running watts, 30 amps, and 240 volts
  • Parallel capability
  • Relatively low noise levels of 67 dBA
  • Nice run time of 18.5 hours at 25% load
  • Clean THD power
  • Electric start
  • Weight of 257 lb (116.6 kg)
  • Four GFCI outlets
  • CO sensor
  • Relatively positive customer reviews
  • 2 years limited emissions control system and 90 days limited product warranties

Cons

  • Short warranties
  • Does not have a 50 amp outlet
  • Durability reputation can be better

Especially with the somewhat disappointing included warranties.

That being said, the Predator 9500 is also doing many things right besides the high amount of clean low THD power as the many happy customers can confirm.

The nice run time of 18.5 at 25% load means you can likely power your AC system overnight or simply enjoy all your watts without too many refueling sessions.

With 67 dBA (typically measured 23 feet away at 25% load), the Predator 9500 is reasonably quiet too although there are better options in this area.

So if you want the full 9500 starting watts, don’t need a 50 amp outlet, and/or trust Harbor Freight enough, the Predator 9500 could be the right large portable inverter for you.

Brand ModelPower
Capacity
Run
Time
Quiet
Operation
THDReliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
Predator 95009.597.5Clean
THD
8.587.55.5$$$Check Price
Predator 9500 performance on a score of 10 compared to similar alternatives

3. Pulsar PGD95BISCO

The Pulsar PGD95BISCO is another big dual fuel inverter generator with 9500 starting watts, 7200 running watts, and a 50 amp outlet.

Similar to the AIVOLT, being able to run on propane with this Pulsar PGD95BISCO can be convenient in a variety of situations.

Do keep in mind that you have fewer watts to rely on when running on propane. In this case, 8550 peak watts and 7200 running watts.

Before considering the Pulsar PGD95BISCO, you do want to know that it does not have that many customers yet.

Pros

  • Pulsar PGD95BISCO offers 9500 starting watts, 7200 running watts, 50 amps, and 240 volts (gasoline)
  • Parallel capability
  • Dual fuel feature so you can run on propane (LPG) too
  • Relatively low noise levels of 62 dBA
  • Nice run time of 9.5 hours at 50% load
  • Clean inverter THD
  • Has remote and electric start
  • Four GFCI outlets
  • 3 years limited warranty

Cons

  • You likely need some help moving the weight of 281 lb (127.5 kg)
  • Not a lot of customers yet

This is relevant because sometimes generators look good on paper but turn out to have a relatively high rate of issues.

Pulsar is a more experienced brand of generators but they have both good and bad models so the PGD95BISCO does involve a certain risk.

That being said, the relatively low noise levels of 62 dBA, nice run time of 9.5 hours at 50% load, electric and remote start, and three years of limited warranty could convince you to try this generator anyway.

One thing is certain, this is one of the largest inverter generators on the market.

Brand ModelPower
Capacity
Run
Time
Quiet
Operation
THDReliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
Pulsar PGD95BISCO988.5Clean
THD
7.5785$$$Check Price
Pulsar PGD95BISCO performance on a score of 10 compared to similar alternatives

4. GENMAX GM9000iE

The GENMAX GM9000iE is definitely one of the largest inverter generators available on the market but whether you actually want to invest in one is a different question.

GENMAX GM9000IE

This is because the overall positivity of the customer reviews is not that great.

There are a good amount of cases where people got a GENMAX GM9000iE that did not work right from the start or relatively early.

These reviews are generally also not the most positive about getting help from support. Even within the short one year warranty.

Pros

  • GENMAX GM9000iE offers 9000 starting watts, 7600 running watts, 50 amps, and 240 volts
  • Parallel capability
  • Relatively low noise levels of 62 dBA
  • 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
  • Also dual fuel version available
  • 1 year limited warranty

Cons

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

At the same time, it is also worth mentioning that there are people who have positive experiences with this generator too.

For example, the remote operation, electric start, and relatively low noise levels of 62 dBA make using this inverter more convenient and pleasant.

The 50 amp outlet and parallel capability can also come in handy if you want to power a lot.

Overall, you likely want to consider better 9000 watt generators or other large inverters but the GENMAX GM9000iE does deserve a spot on this list.

However, you can look at the review of the GENMAX 9000 inverter generator if you really want to give this option a chance anyway.

Brand ModelPower
Capacity
Run
Time
Quiet
Operation
THDReliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
GENMAX GM9000iE988.5<5%75.58.56$$Check Price
GENMAX GM9000iE performance on a score of 10 compared to similar alternatives

5. DuroMax XP9000iH

DuroMax XP9000iH

The DuroMax XP9000iH is another large dual fuel inverter generator with its 9000 starting watts and 7600 running watts.

At the same time, you want to know that this model “only” has a 30 amp which is somewhat surprising at this power level.

This 30 amp outlet also makes it so you may need a few adapters and power cords (and other safety guidelines) to connect the DuroMax XP9000iH to your house.

Additionally, there are customer reviews that mention this large inverter generator stops at watt levels that are lower than described.

Pros

  • DuroMax XP9000iH offers 9000 starting watts, 7600 running watts, 30 amps, and 240 volts (gasoline)
  • Parallel capability
  • 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 9000 watt generators
  • Does not have a 50 amp outlet
  • Some cases of early technical issues
  • A few cases where the generator does not offer the running watts mentioned

Add to these things the reviews of early technical issues and a somewhat lower reliability reputation score for the DuroMax XP9000iH is justified.

That being said, these things are somewhat common in the largest dual fuel inverter generators so you may have to accept this in the package.

The DuroMax XP9000iH also has impressive details like the 20 hours run time at 25% load, electric/remote start, and solid warranties.

So even though it is not perfect, you can still consider the DuroMax XP9000iH if you really want a dual fuel generator around this power level and don’t mind the 30 amp limit.

The more in-depth review of the DuroMax XP9000iH could help you with this decision.

Brand ModelPower
Capacity
Run
Time
Quiet
Operation
THDReliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
DuroMax XP9000iH99.57.5<5%78.586$$$Check Price
DuroMax XP9000iH performance on a score of 10 compared to similar alternatives

What is the biggest inverter generator you can buy?

According to my research, the biggest inverter generator you can buy is the AIVOLT 10000 with 10000 starting watts and 8000 running watts.

This generator brand is not as proven as the more familiar names but if you want a lot of clean low THD power, you now know where to find it.

What is the biggest inverter generator they make?

According to my research, the biggest portable inverter generator they make is the AIVOLT 10000 with 10000 peak watts and 8000 continuous watts.

How big do inverter generators get?

To my knowledge, the biggest inverter generator available on the online market right now has 10000 starting watts and 8000 running watts.

Is there a 50 amp inverter generator?

Yes, there are a few 50 amp inverter generators like for example the AIVOLT 10000, Pulsar PGD95BISCO, and Champion 201067 9000.

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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.