Generac iQ3500 Generator Review

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Generac iQ3500

Generac iQ3500

Generac iQ3500 generator is a mid-range device that is ideal for those users looking for an all-around unit suitable for both indoor and outdoor purposes.

Generac iQ3500 Review

You can use this generator as an ideal RV power source that allows you to run several appliances at a time. This generator also features many advanced features and specs that make it stand apart from the competition.
So, let’s test this amazing generator out to see if it stands its manufacturer’s claim or is just another white elephant sipping your fuel and providing power for a few hours.



Generac iQ3500 generator features 3500 starting wattage and a running wattage of 3000 watts.

Fuel Type And Capacity:

This iQ3500 generator has a relatively bigger fuel tank with a capacity of 2.6 gallons and is driven by gasoline fuel.


The 3-year residential and 1-year commercial warranty on limited parts by Generac stands as such on this generator.


Generac iQ3500 features a 14.1 hours runtime with a loading capacity of 25% while the 50% capacity will allow you for a runtime of 8.9 hours only with its fuel tank at peak value.

Features Generac iQ3500 Generator:

Generac IQ generator is our first generator to be tested from the IQ series. This is a feature-packed generator that claims unrivaled performance. So let’s test run this generator to brief you about its goodness and weaknesses.

Given below is a detailed account of its features that we have tested one by one. You can either go through the specifications to have a general overview or read our article till the end to have a thorough understanding of the operation of this generator.


This Generac generator features 3500 starting watts and its running watts amount to 300 which is thrice the amount of a GP1200i generator that we tested earlier in our review. You can check this review out at our site. (Generac GP1200I article link).

The advanced power rush and true power technologies are present in this device like all other Generac generators. With 3000 running watts, you can run multiple appliances at a time.

What Can You Power With Generac iQ3500?

This generator is good enough for running your all motor-driven electric appliances in your RV. You can also run heaters, fans, recreational devices, a sound system, multiple chargers, a 15,000 BTU Air Conditioner, and much more.


The Generac iQ3500 has a larger fuel tank and therefore claims an increased runtime. But runtime isn’t only accounted for by the fuel tank capacity as you have to mid the load as well, so, let’s test this iQ3500 to say how long will it keep running on its full fuel tank.

The iQ3500 will give you about 14 hours of runtime at 25% load while the 50% load will shift the runtime to 8.9 hours.

You can further enhance the runtime by lowering the load on your generator outlets and running one appliance at a time. You can also put the unit on ECO mode and enjoy an uninterrupted power supply for a long time.

Fuel Capacity:

This Generac generator is breaking the stereotype of the I-series generator that was to come up with a fuel tank capacity of 1 to 1.06 gallons.

But this advanced and heavy-duty device is featuring a 2.6-gallon fuel tank that is twice the capacity of the GP3500i generator.

Thus you can use this generator for longer hours and don’t have to bother about carrying an additional fuel tank with you.

Related Article:

How to Reset Generac 22kW Generator

Noise Level:

This device has a quitter operation of about 5 dbA less than the GP 3500i which means you can enjoy an even quieter engine operation that will be best for tailgating and even for your neighbors.

The best feature of this generator is undoubtedly its silent motor that is operating at a noise level of around 57 dbA this range is almost negligible and will be unlikely to reach your eras from your patio or lawn to your living room.

Economy Mode:

Generac generators don’t leave you struggling to keep an eye on your load and runtime because they have built-in features to do so for you.

When the load increases the peak value of your Generac iQ3500 generator its circuit breakers will automatically trip to prevent further damage.

Similarly, when low on fuel, you can turn on the ECO mode which will automatically adjust the fuel consumption rate of your engine.

The engine speed will be reduced by decreasing the RMP and in this way, less fuel will be used compared to the standard model of engine operation. This ECO mode will increase the runtime like the power-saving mode of your smartphone.

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  • Silent Motor
  • Advanced Power Rush Technology
  • Long runtime
  • Digital LCD control panel


  • Heavy and not very portable
  • Lack fuel gauge

The Bottom Line Generac iQ3500 Generator Review:

Generac iQ3500 generator is comparable to a 3500i generator but with an economical price tag and increased fuel tank capacity.

So, don’t wait any longer and get set for having your hands on this pretty amazing Generac generator that will offer you a silent motor, and advanced technologies like true power and power rush, you can also use the ECO mode to reduce the fuel consumption and saving some fuel for later use. In a nutshell, this mid-range generator can prove to be your best buddy as an all-rounder that you can use indoors and outdoors, for small power needs as well as for running multiple appliances at a time (within the load-carrying capacity of the Generac iQ3500.

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