






⚡ Power up your freedom, quietly and effortlessly.
The Generac GP3500iO is a gas-powered inverter generator delivering 3500 starting watts with advanced PowerRush technology for 50% more starting capacity. It’s up to 50% quieter and 25% lighter than comparable models, making it ideal for RVs, camping, and noise-sensitive environments. Features include USB and parallel outlets, caravan compatibility for air conditioners up to 15,000 BTUs, and a durable open frame design for optimal cooling and portability.





| ASIN | B079KRLHBT |
| ASIN | B079KRLHBT |
| Batteries Included? | No |
| Batteries Required? | No |
| Color | Orange-Coloured |
| Customer Reviews | 4.5 4.5 out of 5 stars (344) |
| Customer reviews | 4.5 4.5 out of 5 stars (344) |
| Date First Available | 1 April 2018 |
| Date First Available | 1 April 2018 |
| Included components | Generac 7128 GP3500iO Portable Open frame Inverter Generator |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 33.7 Kilograms |
| Item model number | 7128 |
| Item model number | 7128 |
| Manufacturer | Generac |
| Manufacturer | Generac |
| Material | Steel and plastic |
| Part number | 7128 |
| Power source type | gas-powered |
| Product Dimensions | 49.02 x 42.93 x 41.66 cm; 33.7 kg |
| Product Dimensions | 49.02 x 42.93 x 41.66 cm; 33.7 kg |
| Size | 19.3 x 16.9 x 16.4 inches |
| Special Features | Portable |
| Voltage | 120 Volts |
| Wattage | 3500 watts |
J**M
I own a Honda EU2000 which cost $1200 and love it but I wanted a 3500 and didnt want to spend $2000+. So I bought a Generac 3500iO last year, used it on my farm that does not have electric and it worked great. Strong generator. I put it in storage for a year in 2021, then came back to my farm in 2022. Filled it with fuel, and it started easily on the 2nd pull. I put about 10 hours on it this year and still works perfect and starts very easy. Love it just as much as my Honda so far. And its very quiet, super pleased with this product. Its easy to carry with the medal frame. Love it. I like the open frame so that the engine gets plenty of air and runs cool. Perfect balance and design and function. So I just ordered a 2nd so I can run parallel for more power when needed. Highly Recommended. 2 generators for twice the power and half the price. This is the only brand I could take a chance on other then Honda. Generac did a great job with this model.
J**N
It is small enough to fit in my truck bed with the tonneau cover on and light weight enough (74 lbs) to manage. It provides as many watts (3,500) as much heavier generators, is relatively quiet, and it started with the first pull of the cord. It has a 30 amp input, which is perfect to use it to power my travel trailer, but it does require an adaptor to connect them.
M**E
These are great little generators. I work with a non-profit that does disaster response and the other small generators that we have used for years are no longer being manufactured. When we started looking for replacements, I wanted something with a good brand name behind it, small and compact, powerful, and easy to transport and maintain. These are usually used when there are disasters and people need them to provide temporary power for their homes. I ordered one of these to test it and then ordered nine more once I determined this was what we wanted. These are compact and have the frame all the way around them for ease in carrying and for protection. They are super easy to start and run smoothly and efficiently. One great thing about these is that they come with everything you need to get started (sans gas) in that there is a funnel and a bottle of oil that contains the exact amount you need. I wish there was somewhere to store the funnel and tools that come with it, but I'll likely tie a mesh or other bag to them. I'm very pleased so far and will use these for our next disaster. One tiny little thing that could improve these is if they would include holes for your hands in the box so they would be easier to grasp and move. That's a very small thing but when you are moving lots of these just a little handhold on each side would be so helpful.
T**D
Only have a couple hours on it. Not very noisy and is stingy on the gas. I have an old Onan that has less capacity that drinks twice the gas.
R**.
This is a great generator, use this with my rv. Will run everything in my rv when boondocking. It does weigh a little more then a smaller gen but I like that I can run everything in my rv. At night before I go to bed I fill the gas tank up and when I run the ac it will not run out of gas.
Trustpilot
3 weeks ago
3 weeks ago