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Generac GP3500iO
Generac GP3500iO
Generac GP3500iO
Generac GP3500iO
Generac GP3500iO
Generac GP3500iO
Generac GP3500iO
Generac GP3500iO
Generac GP3500iO
Generac GP3500iO
Generac GP3500iO
Generac GP3500iO
Generac GP3500iO
Generac GP3500iO
Generac GP3500iO
Generac GP3500iO
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Generac GP3500iO - 3000 Watt Open Frame Inverter Generator (CARB)

Model:

GP3500iO

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Generac GP3500iO - 3000 Watt Open Frame Inverter Generator (CARB)
Generac GP3500iO - 3000 Watt Open Frame Inverter Generator (CARB)
Model: GP3500iO
Product Discontinued
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Features
Specifications
Reviews
How-To Articles
Manuals

Recommended Accessories

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Features

Grade

Recreational

Style

Portable

Run Watts

3,000 Rated Watts

Surge Watts

3,500
Starting Watts

Fuel

Gasoline

Engine

Generac

  • Generac GP3500iO - Portable Open-Frame Inverter Generator
  • Designed for RV Power and power tools around the yard
  • 30A (L5-30) Receptacle
  • Easily connect a 30A RV plug (Not Included) for your power needs
  • PowerRush™ Technology*
  • Provides 50% + motor starting capacity
  • Easily powers most RV AC units up to 13,500 BTU
  • TruePower™ Technology
  • Provides clean power for power tools and electronics
  • PowerDial™ - All Controls, One Dial
  • Streamlines the start-up process; no separate run, fuel or choke
  • Intuitive design, makes it extremely easy to operate this generator
  • 212cc Generac® 4-Stroke OHV Engine w/ Low Oil Shutoff
  • Designed for long life with safeguards in-place for peace of mind
  • 2.37-Gallon Fuel Tank
  • Up to 8 hours of runtime @ 50% load
  • Engine Smart Control
  • Allows for reduced fuel consumption and quieter operation
  • LED Generator Status Lights
  • Indicators for power, low oil and overload occurrences
  • 25% Lighter, Compared To Generac GP3300
  • Makes this generator easy to transport and set-up
  • (1) 1-AMP & (1) 2.1-AMP USB Outlets
  • Makes it easy to charge phones and tablets
  • *NOTE -Increases electrical current upon demand; above rated output
  • 2-Year Limited Residential & 1-Year Limited Commercial Warranty
California residents see
Warning: This product can expose you to chemicals including Carbon monoxide which is known to the State of California to cause Developmental Harm.
For more information go to: www.p65Warnings.ca.gov

Specifications

Plug Types
NEMA 5-20R (Wall-Type)
NEMA L5-30R
USB
USB
GP3500iO
specs product image PID-82204
General Information
Product Category
Generator - Portable
Overview
Product Category
Generator - Portable
Weight
75 Pounds
CARB Compliant
Yes
Certification
CARB
Made in USA
No
Consumer Warranty
2 Years
Commercial Warranty
1 Year
Product Style
Portable Generator
Product Length
19.2 Inches
Product Width
16.9 Inches
Product Height
16.4 Inches
UPC
696471072020
Additional Model Numbers

7128, GP3500iO

Product Specs
Voltage
120 Single-Phase
Frequency
60 Hertz
Alternator
Inverter
Auto Voltage Regulation
Not Necessary
Rated Watts
3000 Watts
Surge Watts
3500 Watts
Fuel Type
Gasoline
Rated Amps
25 Amps
Tank Size
2.37 Gallons
Run Time @ 50% Load
8 Hours
Fuel Tank Material
Metal
Fuel Gauge
Yes
Idle Control
Yes
Hour Meter
No
Voltage Meter
No
Lifting Eye
No
Grade Type
Recreational
Low THD
Yes
Engine
Engine Brand
Generac
Starting System
Recoil Start
CC
212 CC
Low Oil Alert/Shutdown
Yes
Plugs
NEMA 5-20R - Wall-Type
1
NEMA L5-30R
1
USB
2

Reviews

(13)
Generac GP3500iO Reviews & Ratings
Customer Photos and Videos
review image 1
Customer Rating
4.77
(13 Ratings)
5
(10)
4
(3)
3
(0)
2
(0)
1
(0)
Generac 3500 IO
By R.M. 
WHITNEY, Texas
Review Posted 02/26/2022 
I purchased this unit prior to the Texas 2021 freeze....the neighbors plugged in their extension cords to power up their heaters and lights during the blackouts....worked great, happy neighbors....have it attached to my Motorhome this summer to winter...850 hrs later no problems...quite satisfied.
R.M. Recommends This
Was this review helpful?
Manufacturer Response
Thank you for taking time out of your day to provide us with your valuable feedback. If you run into any questions, please give us a call at 888-436-3722!
Generac
Rating Breakdown
Features
5/5
icon-review-marker
Quality
5/5
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Performance
5/5
icon-review-marker
Value
5/5
icon-review-marker
Pros:
Quiet, Reliable, Easy To Use, Exceeded Expectations
Verified Buyer
Verified Buyer
Camping And Ply Use
By Mark H. 
Little River, South Carolina
Purchased 09/01/2021 | 
Review Posted 11/05/2021 
Looked for a quiet one, that wouldn't sound like I was next to my Harley all day. Had it for a while but first long time run. In my camper not bad, not even outside. Runs my power tools and extra to spare for my camper. So far vary happy and a great price. Never mind the FAST delivery. Can't complain.
Mark H. Recommends This
Was this review helpful?
Manufacturer Response
Thank you for taking time out of your day to provide us with your valuable feedback. If you run into any questions, please give us a call at 888-436-3722!
Generac
Rating Breakdown
Features
3/5
icon-review-marker
Quality
4/5
icon-review-marker
Performance
3/5
icon-review-marker
Value
4/5
icon-review-marker
Pros:
Quiet, Reliable, Light Weight, Price
Cons:
None so far
Verified Buyer
Verified Buyer
Generac GP3500iO - Highly Recommend For 30 Amp Trailer
By Diana V. 
Monrovia, California
Purchased 07/11/2021 | 
Review Posted 08/02/2021 
After unpackaging the unit upon arrival this baby fired up, with a little help of fuel and oil, right away! Easy to follow usage instructions. Lightweight, compared to other brands, compact and mounted easily on my basket hitch. Plenty of ways to secure it as well. I was able to use my A/C unit and all the features that come with my Lite Trailer. Would recommend it!
Diana V. Recommends This
Was this review helpful?
Manufacturer Response
Thank you for taking time out of your day to provide us with your valuable feedback. If you run into any questions, please give us a call at 888-436-3722!
Generac
Rating Breakdown
Features
5/5
icon-review-marker
Quality
5/5
icon-review-marker
Performance
5/5
icon-review-marker
Value
5/5
icon-review-marker
Pros:
Quiet, Easy To Use, Light Weight, Exceeded Expectations
Verified Buyer
Verified Buyer
Great Generator
By David S. 
Duanesburg, New York
Purchased 09/17/2019 | 
Review Posted 11/04/2019 
We used this for dry camping at a nascar race, worked perfectly!!!
David S. Recommends This
Was this review helpful?
Manufacturer Response
Thank you for the review, we appreciate your feedback. If you have any questions, please do not hesitate to contact our customer support team at 888-GENERAC (436-3722).
Generac
Rating Breakdown
Features
4/5
icon-review-marker
Quality
5/5
icon-review-marker
Performance
5/5
icon-review-marker
Value
4/5
icon-review-marker
Pros:
Quiet, Easy To Use, Reliable
Verified Buyer
Verified Buyer
Clacking Clack start up!
By David S. 
Centerport, New York
Purchased 08/01/2019 | 
Review Posted 09/13/2019 
review 5 image 1
When it first started (after adding oil) it made a noise like a bucket of bolts for 20 seconds. Oil did not get into the rings and valves yet. Nothing in the startup specs suggested this!!! In a blog it suggested that before starting up you should
Pull the spark plug and put a teaspoon of oil in the hole and pull the starter rope a couple of times then put the
plug back in and start it up. Too late for me! Hope the Engine is going to be alright. Engine has a lot of kick back
and sometimes pulls the starter rope right out of your hand. Other than that it sees to run very good. Switch to full
synthetic 5W30 after 20 hours of run time. Good for long duration run times.
David S. Recommends This
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Expert Response
It's pretty standard on all small engines to pull the starter rope a few times to get the engine parts lubricated when fresh oil is added.
Alberto, the Portable Generator Expert
Alberto C.
Generator Expert
Manufacturer Response
Thank you for the review, we appreciate your feedback. If you have any questions, please do not hesitate to contact our customer support team at 888-GENERAC (436-3722).
Generac
Rating Breakdown
Features
4/5
icon-review-marker
Quality
4/5
icon-review-marker
Performance
4/5
icon-review-marker
Value
4/5
icon-review-marker
Pros:
Quiet, Reliable, Light Weight, Features
Cons:
Bad Instructions
Verified Buyer
Verified Buyer
The Best Portable Quiet Generator
By Gerard G. 
BLYTHEWOOD, South Carolina
Purchased 06/10/2019 | 
Review Posted 07/01/2019 
I have a RV trailer trailer this Generac powers everything all at once. Light, A/C, T.V. and all power. A great purchase for a great price. This site had the best price by far. Love my Generac!!
Gerard G. Recommends This
Was this review helpful?
Manufacturer Response
Thank you for your review, we appreciate your feedback. If you have any questions, please do not hesitate to contact our customer support team at 888-GENERAC (436-3722).
Generac
Rating Breakdown
Features
5/5
icon-review-marker
Quality
5/5
icon-review-marker
Performance
5/5
icon-review-marker
Value
5/5
icon-review-marker
Pros:
Quiet, Price, Exceeded Expectations, Easy To Store
Cons:
A bit heavy for a portable generator
Verified Buyer
Verified Buyer
Full Time RV.....
By Michael L. 
Franklin, North Carolina
Purchased 12/22/2018 | 
Review Posted 01/16/2019 
When it rains in the mountains of Western Carolina we lose power for weeks on end sometimes. Having a Generac generator gives you that piece of mind that I know we will be warm toasty and comfortable for those times, only we do have no power. Where everyone else wishes they had one. Good quality, very reliable and rugged. Started right up quiet just wish it had tires.... buy this product.
Michael L. Recommends This
Was this review helpful?
Manufacturer Response
Thank you for the great review, we appreciate your feedback. If you any questions, please do not hesitate to contact our customer support team at 888-GENERAC (436-3722).
Generac
Rating Breakdown
Features
4/5
icon-review-marker
Quality
5/5
icon-review-marker
Performance
5/5
icon-review-marker
Value
5/5
icon-review-marker
Pros:
Quiet, Easy To Use, Reliable, Price
Cons:
Heavy, No covers to keep moisture out of the outlets
Verified Buyer
Verified Buyer
Generac Inverter Generator
By Jachin F. 
Texas
Purchased 12/05/2018 | 
Review Posted 12/27/2018 
A great small generator. It came a day early. unpacked it, filled with the included oil added gas and it started on the second pull. unit is actually quieter than anticipated. I purchased unit to charge my 4 boat batteries which are connected to a computerized charging system. The pure current of the inverter works great. Can sleep in my truck with the unit running next to boat and can barely hear it. Unit has exceeded my expectations.
Jachin F. Recommends This
Was this review helpful?
Manufacturer Response
Thank you for the great review, we appreciate your feedback. If you any questions, please do not hesitate to contact our customer support team at 888-GENERAC (436-3722).
Generac
Rating Breakdown
Features
4/5
icon-review-marker
Quality
5/5
icon-review-marker
Performance
5/5
icon-review-marker
Value
2/5
icon-review-marker
Pros:
Quiet, Easy To Use, Reliable, Easy To Store
Cons:
Expensive
Verified Buyer
Verified Buyer
Excellent Small Generator
By Daniel C. 
Clayton, North Carolina
Purchased 09/10/2018 | 
Review Posted 10/08/2018 
I ordered this generator just before we got brushed by hurricane Florence and, thankfully, received it the day before the storm hit. We lost power for about 27 hours the following morning. I only had 5 gallons of gas so I used it sparingly to run the refrigerator, a TV and some lights. It ran for a total of 10 hours and used less than two gallons of gas! Also, it is so quiet we had it running on the back deck outside the rear sliding doors and we could still hear the neighbor's noisy generator over ours. It starts right up and is easy to use. A little pricey but not bad for an inverter type generator and worth the extra bucks.
Daniel C. Recommends This
Was this review helpful?
Manufacturer Response
Thank you for the great review, we appreciate your feedback. If you have any questions, feel free to reach out to us at 888-GENERAC (436-3722). We're available 24 hours a day, 7 days a week.
Generac
Rating Breakdown
Features
5/5
icon-review-marker
Quality
5/5
icon-review-marker
Performance
5/5
icon-review-marker
Value
4/5
icon-review-marker
Pros:
Quiet, Light Weight, Easy To Use, Exceeded Expectations
Verified Buyer
Verified Buyer
Have 109 Hours On My Unit With No Problems
By Rick M. 
Noble, Oklahoma
Purchased 07/02/2018 | 
Review Posted 08/13/2018 
Unit fires right up and runs my 13,500 btu a/c on my 30 foot V-Lite.
Rick M. Recommends This
Was this review helpful?
Manufacturer Response
Thank you for the great review, we appreciate your feedback!
Generac
Rating Breakdown
Features
4/5
icon-review-marker
Quality
5/5
icon-review-marker
Performance
4/5
icon-review-marker
Value
5/5
icon-review-marker
Pros:
Features, Easy To Use, Price, Reliable
Cons:
None

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