Zoom on the Generac GP3500iO
In summary, the Generac GP3500iO is a compact and lightweight portable inverter generator especially useful for:
- RV travellers wishing to enhance their freedom and nomad lifestyle
- People occasionally participating in sporting competitions, open-air performances and outdoor festivals
- Handcrafting enthusiasts who wish to work on-the-go
- Homeowners who want to be able to use the most necessary devices in their household, even during a blackout
- Camping and tailgating hobbyists looking for a portable power source
Power & Run Time
The Generac GP3500iO's design includes a gasoline-fueled 212 cc Generac OHV 4-stroke engine. With a 120V output, it gives a running wattage of 3000W and also a peak wattage of 3500W. Moreover, since it is parallel capable (GP3500iO Parallel Kit not included), its power may be doubled if linked to a second compatible unit.
This inverter generator gets running thanks to a simple traditional pull-start mechanism. It features Generac's PowerDial™, an easy-to-use dial with three operation settings.
With a full tank, the GP3500iO can operate for up to 11 hours (fuel consumption around 0.22 GPH), thanks to its fuel capacity of 2.37 gallons.
As the GP3500iO produces a clean sine wave, with a <3% Total Harmonic Disruption (THD), sensitive electronics may be plugged in the AC outlets safely.
The control panel provides the upcoming 3 AC outlets:
In addition, it provides 2 DC outlets: there's two 5V USB ports with which you may charge electronics, for example mobile phones or tablets, conveniently.
Even if this Generac generator isn't quite RV Ready, it still allows for an easy RV connection via an L5-30P to TT-30R adaptor, thanks to its L5-30R receptacle.
The Generac GP3500iO has the following dimensions: L19.3 x W16.9 x H16.4 in. In combination with its conventional, open frame design, they provide support and allow the generator to be raised above ground level. The device has been designed for tough environments and demanding outdoor use.
The GP3500iO can be taken anywhere with you, thanks to its weight of 74.3 lbs. In addition, it is even easier to grab and move the generator around thanks to its open frame design.
Monitoring of the GP3500iO's status and activity is made possible by a digital data center, which provides information on the lifetime run hours and is one of the features of its control panel.
In addition to this info, the device’s light indicators will display if the generator is ready, the generator is on overload and the oil level is too low.
Security-wise, this product benefits from an automatic low oil shut-off and an overload protection (circuit breaker), which gives you a complete peace of mind when using it.
With the basic documentation and an owner's manual (opens in a new tab), letting you start the generator quickly, the Generac GP3500iO also comes with several accessories, including: oil, tool kit and funnel.
The Generac GP3500iO is CARB-compliant. It can therefore be sold and purchased in all 50 states, including California.
Moreover, it features a spark arrestor, which makes it suitable for use in forested areas.
The Generac GP3500iO versus other generators
The following charts are provided to give you an idea of how some of the key specs of the Generac GP3500iO compare to generators of similar power (between 2500 and 3500 W).
- As for its weight, the Generac GP3500iO weighs only 74.3 pounds, making it one of the lighter generators in the 2500-3500 rated wattage category. Regarding dry weight, one of the champions in the same power range is the Genmax GM3300i, with a dry weight of only 47.4 lbs.
- Regarding its autonomy, the autonomy of the GP3500iO, reaching up to 11 hours at a 25% load, can be considered as low end, compared to other products of a roughly equal output. Concerning the run times, one of the several devices with a comparable output, offering the highest autonomy, is the Champion 200914, which is able to run for up to 22 hours.
- The run time is important, but also hugely depends on the capacity of the fuel tank and doesn't mean much if we don't talk about fuel consumption as well. Compared to its peers, this inverter generator is not exactly fuel efficient, compared to similarly powerful devices, with an estimated fuel consumption of 0.22 GPH at a 25% load. If you wish to further improve in the area of fuel efficiency, the Energizer eZV3500P, which boasts with a gas consumption of only 0.13 GPH, may be the right generator for you.
Here's a list of the most popular specific comparisons:
As you can see from this interactive chart, when compared to other 2500-3500W generators, the Generac GP3500iO is on the average side of the price range.
Therefore, this generator nicely fits in the expected budget for this kind of product.
The bottom line
- In the expected price range
- Several accessories included
- Parallel capable
- Lightweight (74.3 lbs)
- No electric start
- Relatively low run time
- Low fuel efficiency
Features and Specifications
|Parallel capable||Yes, cable not included|
|Engine||212 cc Generac OHV 4-stroke|
|Voltage||AC: 120V 60 Hz, DC: 5V|
|Running watts||3000 W|
|Starting watts||3500 W|
|Running amps||25 amps|
|Peak amps||29.2 amps|
|Run time @50% load||8 h|
|Run time @25% load||11 h|
|Automatic Voltage Regulation||Inverter|
|AC outlets|| |
|DC outlets||2x 5V USB port|
|Data center||Lifetime run hours|
|Indicators||Low oil, overload and output ready|
|Fuel tank||2.37 gal|
|Approx. dimensions (L x W x H)||19.3 x 16.9 x 16.4 in|
|Noise (lower limit)||Unknown|
|Security||Low oil and overload protection|
|Accessories included||Oil, funnel, and tool kit|
|Other model numbers||7128|
Unlike many websites, we did our best to research each of the specs above. That being said, we are not immune to making the occasional mistake or omission. Should you notice any missing or incorrect values, don't hesitate to suggest improvements so we can address the issue.
Generac Power Systems is an American based generator and power equipment manufacturer, founded in 1959. As its name suggests, the main focus of Generac are power generators, and other related electric equipment, such as switches, paralleling systems and small engines. The company has several manufacturing facilities based in the US, thus, their products are made in the USA. However, the company provides no information about the origin of their components.
The Generac GP3500iO is covered under a warranty for up to 3 years. This warranty may be limited and may not cover all parts of the generator.
For more information about the warranty of Generac generators, please consult Generac's warranty policies (opens in a new tab). Alternatively, you can also contact their Customer Support: 1-888-GENERAC (888-436-3722).
Questions & Answers
What can it power?
|Item||Running Watts||Starting Watts|
|At home||AC (10,000 BTU)||1500||2200|
|Refrigerator (energy star)||192||1192|
|Set of 5 LED light bulbs||55||55|
|Total||2397 W||3397 W|
|For camping||RV AC (11,000 BTU)||1010||1600|
|Total||2390 W||2980 W|
|Electric fence (25 miles)||250||250|
|Total||2380 W||3480 W|
What is the noise rating of the GP3500iO?
Due to the lack of standardization in noise emission measurement, Generac does not provide their units' noise levels.
Does it have an eco mode? (Asked March 19th, 2020)
There is an economy switch that can be put to "ON" when running appliances or equipment that are resistive loads (non-motor starting), such as TVs, lights, laptops, etc.
I want a fuel shut off valve where do I find it (Asked September 24, 2020)
The "OFF" position of the PowerDial Switch stops the engine and shuts off fuel flow.
This unit is a inverter generator ,why do you say it isn't for RV . Is it good for Small 24 ft. Travel trailer? 1 small roof air conditioner? And tv outlets few other things ? (Asked March 20, 2021)
We did not say it's not for RV. We said it's not RV-Ready, since it does not have a TT-30R outlet. This does not mean that the unit is not suitable for an RV. You may read our definition of RV-Ready and use our wattage calculator to estimate your appliances power needs.
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