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Generac GP2500i - 2200/2500W Inverter Generator

The Generac GP2500i (8251) is a compact and lightweight inverter generator with a rated wattage of 2,200 W and a starting wattage of 2,500 W.

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Description

An affordable solution for recreational applications, the GP2500i is the perfect size for tailgating,camping and power on the go. (source: Generac (opens in a new tab))

Zoom on the Generac GP2500i

In summary, the Generac GP2500i is a compact and lightweight portable inverter generator especially useful for:

  • Camping and tailgating hobbyists looking for a portable power source
  • Amateur DIY lovers

In the following paragraphs, we shall explore the power characteristics, available outlets, portability, and any additional features of the device, along with its emission compliance information.

Power & Run Time

The Generac GP2500i in use

The Generac GP2500i

The Generac GP2500i's design includes a gasoline-fueled 98 cc OHV 4-stroke engine. With a 120V output, it gives a running wattage of 2,200W and also a peak wattage of 2,500W. In addition, as it is parallel capable (7118 parallel kit (opens in a new tab) not included), this power can be doubled when linked to another similar or compatible unit.

This inverter generator gets running thanks to a simple traditional pull-start mechanism.

Thanks to a fuel capacity of 1 gallon, the GP2500i can operate for up to 8 hours with a full tank (fuel consumption around 0.13 GPH).

The GP2500i generates a clean sine wave: providing <3% Total Harmonic Distortion (THD), delicate electronics can be plugged in its AC outlets safely.

Outlets

The control panel features the upcoming 2 AC outlets:

Duplex 120V 20A (5-20R)

Additionally, it features 3 DC outlets: there's two 5V USB ports (1 x USB-A) allowing you to conveniently charge electronics such as mobile phones and tablets and a 12V 8A receptacle with which charging your batteries is made easy.

Portability

As the Generac GP2500i is an inverter generator, its encased design (L19.7 x W11.4 x H17.9 in) offers more aesthetics than a conventional, open frame product. This type of design is the most modern and convenient way to recreationally generate power.

With a weight of only 48 lbs, the GP2500i may be viewed as a lightweight and portable generator. The product’s power can be enjoyed on-the-go, as it can be moved by a single person without trouble. In addition, a handle (molded in the case) lets you carry it easily and further increases its convenience.

Features

Panel of the Generac GP2500i

The GP2500i's control panel

Several light indicators serve to show you when the generator is ready, its oil levels are insufficient and the generator is overloaded.

From a security standpoint, the product offers an automatic low oil shut-off and an overload protection (circuit breaker), allowing you to use it with a peace of mind.

The GP2500i 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.

Along the basic documentation and an owner's manual (opens in a new tab), useful for starting the generator right away, the Generac GP2500i's package also includes these accessories: oil, tool kit, battery charging cables and funnel.

Emissions

The Generac GP2500i is EPA-approved and CARB-compliant. Therefore, its sale and purchase are permitted in all of the 50 states, including California.

Moreover, it features a spark arrestor and therefore, can be used in forested areas.

Product Video

The Generac GP2500i versus other generators

The following charts are provided to give you an idea of how some of the key specs of the Generac GP2500i compare to inverter generators of similar power (between 1500 and 2500 W).

  • Since the generator weighs in at a dry weight of 48 lbs, the Generac GP2500i belongs in the expected weight range for inverters which can produce between 1500 and 2500 rated watts. Regarding dry weight, one of the champions in the same power range is the Genmax GM2000i, with a dry weight of only 34.2 lbs.
  • The GP2500i's autonomy is somewhat low end compared to devices of its type and power range, as it reaches only up to 8 hours at 25% load on a full tank. Concerning the run times, one of the several devices with a comparable output, offering the highest autonomy, is the DuroMax XP2300iH, which is able to run for up to 13 hours.
  • Run times are important, yet thanks to their dependence on the fuel capacity, they should be judged along with the fuel consumption of the device. This inverter generator is rather wasteful, compared to other devices within the aforementioned output range, when it comes to gasoline consumption, as it reaches roughly 0.13 GPH at a 25% load. If you wish to further improve in the area of fuel efficiency, the DuroMax XP2300iH, which boasts with a gas consumption of only 0.08 GPH, may be the right generator for you.

Here's a list of the most popular specific comparisons:

Price comparison

As you can see from these interactive charts, when compared to other 1500-2500W inverter generators, the Generac GP2500i 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
AVERAGE SPECS:
  • Decent weight (48 lbs)
WEAKNESSES:
  • No data center
  • Relatively low run time
  • Low fuel efficiency

Do you own the Generac GP2500i 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
Engine98 cc OHV 4-stroke
Starting systemRecoil
Warranty3 years
Power
VoltageAC: 120V 60 Hz, DC: 12V
Running watts2,200 W
Starting watts2,500 W
Running amps18.3 amps
Peak amps20.8 amps
Run time @50% load4.5 h
Run time @25% load8 h
Features
GFCI outletsNo
Covered outletsYes
Automatic Voltage RegulationInverter
AC outlets1x Duplex 120V 20A (5-20R)
DC outlets2x 5V USB port (USB-A)
1x 12V 8A receptacle
Data centerNo
IndicatorsLow oil, overload and output ready
Fuel tank1 gal
Fuel gaugeNo
Misc
Weight48 lbs
Approx. dimensions (L x W x H)19.7 x 11.4 x 17.9 in
Noise (lower limit)Unknown
THD< 3%
ComplianceCARB, EPA
SecurityLow oil and overload protection, CO monitoring
Spark arrestorYes
NeutralFloating
Accessories includedOil, funnel, tool kit, and battery charging cables
Other model numbers8251
UPC696471099942

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.

Spec Improvement×

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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 GP2500i 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 homeRefrigerator (energy star)1921192
Clothes iron12701270
Cell phone charger2020
Total1482 W2482 W
For campingRadiant heater13001300
RV refrigerator180600
Slow cooker270270
Total1750 W2170 W
For workDemolition hammer12601260
Electric fence (25 miles)250250
Bug zapper8080
Total1590 W1590 W
What is the noise rating of the GP2500i?

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

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Generac GP2500i
7.8 Total Score
3 reviews
Add your review
Price
8.3
Value
8.7
Quality
6
Performance
8.3

User Reviews

Most Recent Most Helpful Highest Rating Lowest Rating Add your review
  1. 3.4
    Price
    70
    Value
    70
    Quality
    60
    Performance
    70

    It works well but support from Generac for the small portables is pathetic. I won’t buy another one.

    + PROS:
    • Lightweight
    - CONS:
    • Difficult to service and find replacement parts at reasonable cost.
    Helpful(0) Unhelpful(0)You have already voted this
  2. 4.75
    Price
    100
    Value
    100
    Quality
    80
    Performance
    100

    I lost power due to a storm bought this 2500 to get me through great little generator. I ran my refrigerator my furnace, my fish tank and a couple of lights ran 4 1/2 hours until the power came back on and only used a half a tank of gas. For the money great product.

    + PROS:
    • Light weight portable not to heavy
    - CONS:
    • I didn’t have any
    Helpful(0) Unhelpful(0)You have already voted this
  3. 3.65
    Price
    80
    Value
    90
    Quality
    40
    Performance
    80

    Drinks gas at anything past idle which is any load over 5 amps
    EXTREMELY NOISY!! Even with light load. I placed it 30 ft from my camper with the exhaust pointed away and it kept me up all night. If I could get all my money back on this, I would do it and buy a better one that wasn’t so noisy. Had one years ago that was so quiet I couldn’t hear it at all from 30 ft

    + PROS:
    • 20 amp outlet
    • Lightweight
    - CONS:
    • Drinks gas at anything past idle which is any load over 5 amps
    • EXTREMELY NOISY!! Even with light load. I placed it 30 ft from my camper with the exhaust pointed away and it kept me up all night. If I could get all my money back on this, I would do it and buy a better one that wasn't so noisy. Had one years ago that was so quiet I couldn't hear it at all from 30 ft
    Helpful(1) Unhelpful(0)You have already voted this

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