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Generac GP1800 Spec Review

The Generac GP1800 (5981) is a compact open frame portable generator with a rated wattage of 1800 W and a starting wattage of 2050 W.

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Picture 1 of the Generac GP1800
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Description

An affordable solution for recreation applications. Perfect size for tailgating,camping and power tool use. (source: Generac (opens in a new tab))

Zoom on the Generac GP1800

In a nutshell, the Generac GP1800 is a compact portable generator mostly geared towards:

  • Camping and tailgating buffs looking to enhance their experience
  • 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 GP1800 in use

The Generac GP1800

The Generac GP1800 is powered by a 163 cc Generac OHV 4-stroke engine. It delivers 120V, runs on gasoline and offers a running wattage of 1800W as well as a peak wattage of 2050W.

The generator features a simple traditional pull-start mechanism.

The fuel capacity of 3.5 gallons allows the GP1800 to operate for around 10.5 hours at 50% load with a full tank (fuel consumption around 0.33 GPH).

The quite high THD (<25%) of the GP1800 makes it unsuitable for powering sensitive electronic devices.

Outlets

The control panel includes the following 2 AC outlets:

Duplex 120V 20A (5-20R)

Portability

The Generac GP1800 has the following dimensions: L22.8 x W16.8 x H17.3 in. In combination with its conventional, open frame design, they provide support and allow the generator to be raised above ground level. The generator is designed for ideal use outdoors and in rough environments.

The GP1800's dry weight of 84 lbs lets you use its power anywhere needed. Additionally, the generator’s mobility is also improved by its open frame design, as it can be easily grabbed and shifted.

Features

Panel of the Generac GP1800

The GP1800's control panel

The generator includes a built-in fuel gauge, a quick, easy and convenient method of checking the device’s gas level.

As far as security is concerned, the generator can be used with a peace of mind, as it features an automatic low oil shut-off and an overload protection (circuit breaker).

Besides the usual set of documentation and owner's manual (opens in a new tab) to get you promptly started, Generac also included a funnel in the GP1800's packaging.

Emissions

The Generac GP1800 is EPA approved, but NOT CARB-compliant. Thus, it cannot be purchased or sold in California.

However, it features a spark arrestor, which makes it suitable for use in forested areas.

The Generac GP1800 versus other generators

The following charts are provided to give you an idea of how some of the key specs of the Generac GP1800 compare to generators of similar power (between 1500 and 2500 W).

  • As its dry weight is 84 pounds, the Generac GP1800 is one of the heavier of the products which can generate 1500 to 2500 running watts. Regarding dry weight, one of the champions in the same power range is the WEN 56202i, with a dry weight of only 38.6 lbs.
  • Thanks to an impressive running time of around 10.5 hours at 50% load, the GP1800 benefits from a higher run time than many generators of a similar output. If autonomy is your priority, one of the devices of a similar power output with the highest run time is the Westinghouse WGen2000, reaching around 20 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. This generator is somewhat less fuel efficient than devices of comparable output: its estimated fuel consumption reaches 0.33 GPH at a 50% load. If not satisfied with the afore-mentioned fuel consumption, you may wish to check out the Westinghouse iGen2200. With a fuel consumption of as little as 0.12 GPH, it is one of the most efficient generators currently on the market.

Price comparison

As you can see from this interactive chart, when compared to other 1500-2500W generators, the Generac GP1800 is on the cheap side of the price range.

It can therefore be a really good buy if you're looking to acquire a budget generator.

The bottom line

STRENGTHS:
  • Inexpensive
  • High run time
WEAKNESSES:
  • No data center
  • No electric start
  • Not CARB-compliant
  • On the heavy side (84 lbs)
  • Low fuel efficiency

Do you own the Generac GP1800 and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

Features and Specifications

General
InverterNo
PortableYes
Parallel capableNo
RV readyNo
FuelGasoline
Engine163 cc Generac OHV 4-stroke
Starting systemRecoil
Power
VoltageAC: 120V 60 Hz
Running watts1800 W
Starting watts2050 W
Running amps15 amps
Peaks amps17.1 amps
Run time @50% load10.5 h
Run time @25% loadN/A
Features
GFCI outletsNo
Covered outletsNo
Automatic Voltage RegulationYes
AC outlets1x Duplex 120V 20A (5-20R)
DC outletsNo
Data centerNo
IndicatorsNo
Fuel tankSteel, 3.5 gal
Fuel gaugeYes
Misc
Weight84 lbs
Approx. dimensions (L x W x H)22.8 x 16.8 x 17.3 in
Noise (lower limit)N/A
THD< 25%
EmissionsEPA
SecurityLow oil and overload protection
Spark arrestorYes
NeutralBonded to frame
Accessories includedFunnel
Warranty2 years
Other model numbers5981

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.

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 made in the USA. However, the company provides no information about the origin of their components.

Warranty Information

The Generac GP1800 is covered under a warranty for up to 2 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 sizing calculator.
ItemRunning WattsStarting Watts
At homeRefrigerator (energy star)1921192
Freezer8101750
Pair of small speakers4545
Total1047 W2047 W
For campingRV AC (11,000 BTU)10101600
RV refrigerator180600
Mixer200200
Pair of small speakers4545
Total1435 W2025 W
For workDemolition hammer12601260
Bug zapper8080
Total1340 W1340 W

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