Generac GP3500iO Built-In USB Outlets Gas Generator

Last updated: March 20, 2023


We looked at the top Gas Generators and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Gas Generator you should buy.

Product Details

In our analysis of 37 expert reviews, the Generac GP3500iO Built-In USB Outlets Gas Generator placed 12th when we looked at the top 23 products in the category. For the full ranking, see below.

From The Manufacturer

PowerRUSH Technology – Delivers over 50% more starting capacity-allowing you to do more with less. Up to 50% quieter – ideal for noise sensitive environments/ up to 25% lighter – for improved portability. True power technology – clean power for sensitive electronics. RV ready – connect directly to RV to power most RV air conditioners up to 15, 000 BTU. USB outlets and parallel ready – connect 2 units together for double the power. One simple-to-use dial that integrates start/run/stop functions with PowerDial.

Expert Reviews


What reviewers liked

Well-built, durable construction. Economy mode saves power, fuel, and noise. Affordable. 30A outlet is RV-ready.
Made by a top-rated brand, this generator operates much quieter than other units.
User-friendly, informative interface. A low oil warning, an overload warning, and an LED that indicates the load is ready. Additional power can be provided by connecting a second unit. Numerous outlets for a variety of devices. Sensitive devices are protected by True Power technology.

What reviewers didn't like

Bulkier and heavier than many inverters. No 240-volt outlet for home backup.
After a few uses, the unit gets harder to start and intermittently shuts down during operation.
There are no wheels to make portability easier. A decibel measurement is not available.
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