5 Best 3500 Watt Inverter Generators

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Discover the best 3500 watt inverter generators so you can power a nice amount without breaking the bank and without headaches.

Best 3500 watt inverter generators top picks

  1. Predator 3500 – Best 3500 watt inverter generator (including for RVs)
  2. WEN 56380i 3800 – Most budget-friendly and best “3500 watt” inverter generator if you don’t mind the 3800 peak watts
  3. GENMAX GM3500iAED – Best 3500 watt dual fuel inverter generator (with remote start) (you will likely prefer a Westinghouse iGen4500DF)
  4. Yamaha EF3000iSEB – Quietest and most reliable 3500 watt inverter generator
  5. Generac 7128 GP3500iO

It is worth briefly noting that 3500 watt inverter generators that are lower on the list can be better for certain needs and preferences.

How we selected our top picks

Our experts spent a lot of time looking at and comparing all the different important factors of the best 3500 watt inverter generators.

Some of the things that were taken into consideration when making our selection include:

  • Run time, power capacity, outlets, portability, noise levels, 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 ModelPower
Capacity
Run
Time
Quiet
Operation
THDReliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
Predator 350087.59Clean
THD
8.5787.5$$Check Price
WEN 56380i989<1.2%9987.5$Check Price
GENMAX GM3500iAED8.56.58<3%6.57.58.58.5$$Check Price
Yamaha EF3000iSEB7.59.59.5Clean
THD
9.57.57.56.5$$$$$Check Price
Generac 7128 GP3500iO87.5?<5%8778$$Check Price
Best 3500 watt inverter generators performance on a score of 10 in important categories*

*Compared to similar generators and sometimes based on customer input

5 Best 3500 watt inverter generators reviewed

People who know what they want and need in their 3500 watt inverter generators could find the list of top picks enough to make a choice.

At the same time, deciding on the best model for your personal situation can also become easier with the more in-depth reviews below.

1. Predator 3500 – Best 3500 watt inverter generator

Our top pick for the best 3500 watt inverter generator is the Predator 3500 but you do want to keep a few things in mind before investing in it.

First of all, this model gets a few bonus points for actually being a 3500 peak watt generator. If you don’t care about this, the next option from WEN tends to be better.

Besides that, the Predator 3500 has short warranties and does not have the best reputation for durability which means you may have to replace it relatively fast.

For purposes like powering an RV, camping, tailgating, using power tools, etc. every once in a while, the Predator 3500 can still be a good choice.

On the flip side, people who want a reliable 3500 watt inverter generator for something like backup power for outages may want to choose a different model.

Pros

  • Predator 3500 offers 3500 starting watts, 3000 running watts, 29.17 amps, and 120 volts
  • Parallel capability
  • Relatively low noise levels of 56 dBA
  • Run time of 11 hours at 25% load
  • Clean THD power
  • Electric start
  • CO sensor
  • Weight of 102 lb (46.3 kg)
  • Relatively positive customer reviews
  • 2 years limited emissions control system and 90 days limited product warranties
  • A lot of customers

Cons

  • Short warranties
  • Generally not the most durable generator
  • Can be a bit challenging to move around

While this reliability reputation does deserve a mention, it is also important to note that the Predator 3500 is still a solid generator at a reasonable price.

The electric start makes it more convenient to get the generator going for older individuals or just people who don’t like the recoil start option.

Additionally, while it is not the quietest option on the list, the 56 dBA noise levels of the Predator 3500 are definitely solid (a conversation is about 60 dB).

In short, for purposes like RVs, camping, and tailgating, where reliability matters just a bit less, the Predator 3500 can be a great 3500 watt inverter generator.

Brand ModelPower
Capacity
Run
Time
Quiet
Operation
THDReliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
Predator 350087.59Clean
THD
8.5787.5$$Check Price
Predator 3500 performance on a score of 10 compared to similar alternatives

2. WEN 56380i 3800 – Budget-friendly and best 3800 watt inverter

As mentioned above, I do give generators that actually have 3500 peak watts bonus points in top picks lists like this one.

However, since you likely mostly care about having a solid generator that can deal with this much power, the WEN 56380i 3800 is often the right choice.

WEN 56380i 3800

This is mainly because the WEN 56380i 3800 has a lower price, a longer residential warranty, and a better reliability reputation than the Predator 3500.

Additionally, you still get quiet operation and a good run time of 8.5 hours at 50%.

Pros

  • WEN 56380i offers 3800 starting watts, 3400 running watts, 30 amps, and 120 volts
  • Parallel capability
  • Relatively low noise levels of 57 dBA
  • Good run time of 8.5 hours at 50% load
  • Less than 1.2% THD
  • Electric start
  • Weight of 99.2 lb (45 kg)
  • Relatively positive customer reviews
  • 2 years limited residential and 90 days limited commercial warranties
  • A lot of customers
  • Budget-friendly

Cons

  • Relatively short commercial warranty
  • Rolling over uneven terrain can be challenging

This run time may just not be enough to run something like an RV air conditioner all night without refueling but it should at least make your trips a lot more comfortable.

One thing you do want to keep in mind is that some customers find it hard to move the WEN 56380i 3800 on uneven terrain due to the small wheels.

This seems to be somewhat common in the best 3500 watt inverter generators but is still relevant for your experience with this model.

So you will likely prefer the WEN 56380i 3800 over the Predator 3500. Especially if you want extra reliability and durability for things like backup power or regular usage.

Brand ModelPower
Capacity
Run
Time
Quiet
Operation
THDReliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
WEN 56380i9891.2%9987.5$Check Price
WEN 56380i 3800 performance on a score of 10 compared to similar alternatives

3. GENMAX GM3500iAED – Best 3500 watt dual fuel inverter generator

The GENMAX GM3500iAED is our top pick for the best 3500 watt dual fuel inverter generator but this is another case where the 3500 peak watts aspect gives bonus points.

It is true that the Westinghouse iGen4500DF tends to be a bit pricier but with the difference in reliability, this is likely worth the investment.

GENMAX GM3500iAED

There are a decent number of cases where customers have issues with their GENMAX GM3500iAED. Especially its electric start.

Even when customers are still within the warranty period, it can be hard to actually get help from GENMAX support.

Pros

  • GENMAX GM3500iAED offers 3500 starting watts, 3200 running watts, 29.17 amps, and 120 volts (gasoline)
  • Dual fuel feature allows you to run on propane too
  • Parallel capability
  • Reasonable noise levels of 62 dBA
  • Less than 3% THD
  • Weight of 56.2 lb (25.5 kg)
  • 1 year limited warranty

Cons

  • Relatively short warranties
  • Run time of 8 hours at 25% load is below average for 3500 watt inverters
  • Decent number of technical issues
  • GENMAX support is not always helpful

It is worth noting that there are still a good amount of customers who are happy with their GENMAX GM3500iAED too.

The dual fuel aspect of this 3500 watt inverter generator with remote start can be helpful for off-grid living and home backup power where getting and storing gasoline is not always convenient.

At least if you don’t mind the suboptimal reliability and run time of the GENMAX GM3500iAED.

So again, unless you really want a more lightweight generator and/or are on a tight budget, something like the Westinghouse iGen4500DF will likely be a better choice.

Brand ModelPower
Capacity
Run
Time
Quiet
Operation
THDReliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
GENMAX GM3500iAED8.56.58<3%6.57.58.58.5$$Check Price
GENMAX GM3500iAED performance on a score of 10 compared to similar alternatives

4. Yamaha EF3000iSEB – Quietest 3500 watt inverter generator

The Yamaha EF3000iSEB is the quietest 3500 watt generator on the list and is impressive in a variety of other areas too.

For example, you will not find many other generators where customer reviews are so positive overall.

This implies that the Yamaha EF3000iSEB is a very solid generator which can be important for example if you want backup power for a freezer full of food.

Additionally, the impressive 18.6 hours on a full tank can be helpful for running things like an RV air conditioner throughout the night.

With the low decibel ratings of 53 to 60 dBA at 25% to 100% load the Yamaha EF3000iSEB is generally the best 3500 watt inverter generator for a purpose like this.

Pros

  • Yamaha EF3000iSEB offers 3500 starting watts, 2800 running watts, 29.17 amps, and 120 volts
  • Quietest 3500 watt inverter generator with 53 to 60 dBA (25% to 100% load)
  • Great run time of 18.6 hours at 25% load
  • Electric start
  • Clean THD power
  • CO sensor
  • Weight of 154.3 lb (70 kg)
  • Very positive customer reviews
  • 3 years limited warranty

Cons

  • Expensive compared to the other 3500 watt inverter generators
  • Bulky weight can be challenging to move around

The main thing you want to keep in mind is that this generator is expensive.

Up to the point where many people will prefer other options on this list of the best 3500 watt inverter generators.

A potential downside that is generally less relevant is the heavier weight of 154.3 pounds. You may need some help to move this generator around.

In short, the Yamaha EF3000iSEB is more of a luxury 3500 watt inverter generator with a matching price tag to show for it.

If you really like the benefits and don’t mind investing more in a solid and quiet generator you could consider this option.

Brand ModelPower
Capacity
Run
Time
Quiet
Operation
THDReliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
Yamaha EF3000iSEB7.59.59.5Clean
THD
9.57.57.56.5$$$$$Check Price
Yamaha EF3000iSEB performance on a score of 10 compared to similar alternatives

5. Generac 7128 GP3500iO

The Generac 7128 GP3500iO is a good 3500 watt inverter generator overall but it is just not impressive enough in a few areas to get a higher spot on the list.

One of the main ones you want to know about is that there are a few exceptional cases where customers have technical issues with their generators.

Generac 7128 GP3500iO

There are still a good amount of people who are very happy with their Generac 7128 GP3500iO but some of the other 3500 watt inverter generators are a bit more reliable.

Pros

  • Generac 7128 GP3500iO offers 3500 starting watts, 3000 running watts, 29.17 amps, and 120 volts
  • Parallel capability
  • Run time of 11 hours at 25% load
  • Less than 5% THD
  • Weight of 74.3 lb (33.7 kg)
  • Relatively positive customer reviews
  • 3 years limited residential and 1 year (or 1000 hours) limited commercial warranties
  • A lot of customers

Cons

  • No decibel rating
  • A few exceptional cases of technical issues

Besides that, it would be nice if Generac measured the number of decibels when operating this generator.

Since the Generac 7128 GP3500iO is open-frame, it is likely on the louder side compared to the other best 3500 watt inverter generators.

So the Generac 7128 GP3500iO is still a solid option but you will likely prefer one of the other generators that is more budget-friendly, more reliable, and/or quieter.

Brand ModelPower
Capacity
Run
Time
Quiet
Operation
THDReliability
Reputation
Fuel
Efficiency
Ease
Of Use
PortabilityPrice
Category
Current
Price
Generac 7128 GP3500iO87.5?<5%8778$$Check Price
Generac 7128 GP3500iO performance on a score of 10 compared to similar alternatives

What is the best 3500 inverter generator?

Our top pick for the best 3500 watt inverter generator is the Predator 3500. Especially for purposes like RV camping, tailgating, and power tools.

That being said, if you don’t mind a generator with a few extra peak watts (which you will likely don’t mind), the WEN 56380i 3800 tends to be the best choice.

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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.