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Generac GP3300i - 2500/3300W Inverter Generator

The Generac GP3300i (7153) is a compact and lightweight inverter generator with a rated wattage of 2,500 W and a starting wattage of 3,300 W. (Read full specs)

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Description

The GP3300i inverter featuring advanced PowerRush™ technology delivers over 50 percent more starting capacity so you can do more with less. (source: Generac (opens in a new tab))

Zoom on the Generac GP3300i

In a few words, the Generac GP3300i is a compact and lightweight portable inverter generator perfectly suited for:

  • Camping and tailgating buffs looking to enhance their experience
  • DIYers who wish to improve their efficiency with tools
  • Homeowners who want to be sure of their ability to power their fridges, cooking tools, heating and lighting equipment during power failures
  • RV travellers looking for even more independence

In the forthcoming sections, you'll delve into its power characteristics, the various outlets it offers, its overall portability, and the additional features it boasts.

Power & Run Time

The Generac GP3300i in use

The Generac GP3300i

The Generac GP3300i's engine, 149 cc Generac OHV 4-stroke, fueled by gasoline, can deliver 120V. It provides a running wattage of 2,500W and reaches a peak wattage of 3,300W. In addition, the device is parallel capable (parallel kit (opens in a new tab) not included) and thus, can be linked to a similar or compatible unit for added power.

This inverter generator utilizes a classic hand-operated recoil starting mechanism for startup. It features Generac's PowerDial™, an easy-to-use dial with three operation settings.

Equipped with a 1.06 gallon fuel tank, the GP3300i ensures continuous operation for up to 7 hours with a full tank (fuel usage approximately 0.15 gallons per hour).

As the GP3300i produces a clean sine wave, with a <3% Total Harmonic Distortion (THD), sensitive electronics may be plugged in the AC outlets safely.

Outlets

The control panel includes the following 3 AC outlets:

Duplex 120V 20A (5-20R)
120V 30A (L5-30R) receptacle

It also sports 2 DC outlets: there's two 5V USB ports (USB-A) perfect for conveniently charging mobile phones, tablets, and other electronic devices.

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.

Portability

Thanks to its closed inverter generator design (L22.2 x W13.3 x H18.4 in), the Generac GP3300i not only offers superior aesthetics but also operates with reduced noise levels compared to a typical, open frame generator. The generator has a contemporary design, convenient for recreationally generating power.

The 59.5 lbs of the GP3300i's dry weight enables you to use it anywhere you will ever need. Additionally, the strategically placed handle (molded in the case) enhances grip, making it significantly easy to move the GP3300i across any distance.

Features

Panel of the Generac GP3300i

The GP3300i's control panel

Light indicators on the device will signal if the generator is ready, the generator is on overload and the oil level is too low.

In terms of security, the generator features an automatic low oil shut-off and an overload protection (circuit breaker), ensuring peace of mind during its use.

The GP3300i also benefits from Generac’s COsense® carbon monoxide monitoring. This technology senses and manages CO output and shuts down the unit when necessary, to protect you from CO poisoning.

Alongside the standard documentation and an owner's manual (opens in a new tab) for quick setup, the Generac GP3300i is bundled with additional accessories: funnel, oil and tool kit.

Product Videos

The Generac GP3300i versus other generators

The following charts are provided to give you an idea of how some of the key specs of the Generac GP3300i compare to inverter generators of similar power (between 2000 and 3000 W).

  • Regarding weight, the Generac GP3300i comes in at only 59.5 pounds, positioning itself as one of the lighter options among inverter generators spanning from 2000 to 3000 in rated wattage. If weight is your top priority, one of the champions in this power category is the WEN 56360i, weighing just 46.3 pounds.
  • Regarding its autonomy, the GP3300i can run for up to 7 hours at a 25% load, aligning it with the lower performers in its type and power range. If runtime is a priority for you, the Honda EU3000iS stands out as one of the generators with the longest run time in its power range, providing up to 20 hours of continuous use.
  • Run time is a key metric, but it's dependent on the generator's fuel capacity. Therefore, discussing fuel efficiency is necessary to get the full picture. At a 25% load, the inverter generator consumes an estimated 0.15 gallons of gasoline per hour, falling within the average consumption range of units with similar output. If you wish to further improve in the area of fuel efficiency, the Westinghouse iGen2800, which boasts with a gas consumption of only 0.08 GPH, may be the right generator for you.

Price comparison

As you can see from these interactive charts, when compared to other 2000-3000W inverter generators, the Generac GP3300i 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

STRENGTHS:
  • In the expected price range
  • COsense® technology
  • Several accessories included
  • Parallel capable
  • Inverter
  • Lightweight (59.5 lbs)
AVERAGE SPECS:
  • Decent fuel efficiency
WEAKNESSES:
  • No data center
  • No electric start
  • Relatively low run time

Do you own the Generac GP3300i and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

Features and Specifications

General
InverterYes
Parallel capableYes, cable not included
RV readyNo
FuelGasoline
Engine149 cc Generac OHV 4-stroke
Starting systemRecoil
Warranty3 years
Power
VoltageAC: 120V 60 Hz, DC: 5V
Running watts2,500 W
Starting watts3,300 W
Running amps20.8 amps
Peak amps27.5 amps
Run time @50% load4.5 h
Run time @25% load7 h
Features
GFCI outletsNo
Covered outletsNo
Automatic Voltage RegulationInverter
AC outlets
  • 1x Duplex 120V 20A (5-20R)
  • 1x 120V 30A (L5-30R)
DC outlets2x 5V USB port (USB-A)
Data centerNo
IndicatorsLow oil, overload and output ready
Fuel tank1.06 gal
Fuel gaugeNo
Misc
Weight59.5 lbs
Approx. dimensions (L x W x H)22.2 x 13.3 x 18.4 in
Noise (lower limit)Unknown
THD< 3%
ComplianceCARB, EPA
SecurityLow oil and overload protection, CO monitoring
Spark arrestorYes
NeutralFloating
Accessories includedOil, funnel, and tool kit
SeriesGP
Other model numbers7153
UPC696471086263

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.

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About Generac

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 engineered and built in the USA. However, their components can be a mix of domestic and foreign parts.

Warranty Information

The Generac GP3300i 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?
Examples of items that can be simultaneously powered.
The examples below are based on a maximum load of 80% and estimated wattages. For a more accurate estimation, use our generator size calculator.
ItemRunning WattsStarting Watts
At homeMicrowave (1000 watts)15001500
Refrigerator (energy star)1921192
Slow cooker270270
Cell phone charger2020
Total1982 W2982 W
For campingRV AC (11,000 BTU)10101600
RV refrigerator180600
Toaster oven800800
Total1990 W2580 W
For workGrinder14002500
Electric fence (25 miles)250250
Drain cleaner250250
Bug zapper8080
Total1980 W3080 W
What is the noise rating of the GP3300i?

Due to the lack of standardization in noise emission measurement, Generac does not provide their units' noise levels.

Can a 3300i be used on a RV that has a surge guard that is hard wired. (Asked June 23, 2021)

The unit has a floating neutral. Your surge guard protection device may detect this as an open ground condition and not allow power to pass through. In that case, you may need to bond the neutral.

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