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Generac GP15000E Spec Review

The Generac GP15000E (5734) is a powerful open frame generator with a rated wattage of 15000 W and a starting wattage of 22500 W.

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Description

A portable unit ideal for applications requiring a large amount of power without being permanent. Ideal for job sites and emergency applications. (source: Generac (opens in a new tab))

Zoom on the Generac GP15000E

In a nutshell, the Generac GP15000E is a powerful portable generator mostly geared towards:

  • Professionals who want to ensure that a power failure will not prevent them from working
  • Small homeowners in search of a full power backup solution

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 GP15000E in use

The Generac GP15000E

The Generac GP15000E's core is the 992 cc Generac OHVI 4-stroke engine, which runs on gasoline. With an output of 120/240V, it provides a running wattage of 15000W and a peak wattage of 22500W.

Its starting mechanism is based on a convenient and easy-to-use electric starter (battery included).

The GP15000E can operate for around 10 hours at 50% load with a full tank (fuel consumption around 1.6 GPH), due to its fuel capacity of 16 gallons.

The GP15000E is unsuitable for the powering of sensitive electronic devices due to its relatively high THD (<20%).

Outlets

The control panel provides the upcoming 8 AC outlets:

Duplex 120V 20A (5-20R) GFCI
Duplex 120V 20A (5-20R)
Two 120V 30A (L5-30R) receptacles
120/240V 30A (L14-30R) receptacle
120/240V 50A (14-50R) receptacle

Furthermore, it has 1 DC outlet: there's a 12V 10A receptacle with which charging your batteries is made easy.

While this Generac generator is not RV Ready, its L5-30R receptacle can be used for a simple RV connection with an L5-30P to TT-30R adaptor. Besides, due to the featured twist-lock L14-30R receptacle, the GP15000E is transfer switch ready: you may connect it to a breaker box to power your household during a power outage.

Portability

With its dimensions of L48.5 x W31 x H39.5 in, the conventional, open frame design of the Generac GP15000E offers stability and allows the generator to be raised above ground level. The featured design is ideal for the outdoors and all tough environments.

Since the generator weighs 363 lbs, it will be incredibly difficult to manually lift it and transport it, even though it is technically considered to 'be portable' (in the sense that it is movable). However, this lack of maneuverability is compensated by its wheel kit (⌀12.3") and its handle, with which you can conveniently shift it, once it's on the ground.

A lift hook located on the top of the frame offers an additional safety feature while facilitating the transport, loading and unloading of the generator.

Features

Panel of the Generac GP15000E

The GP15000E's control panel

To help you monitor the GP15000E's status and activity, its control panel is equipped with a digital data center, giving you information on the lifetime run hours.

The generator allows for a quick, easy and convenient assessment of its gas level, as it is equipped with a built-in fuel gauge.

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

Along the basic documentation and an owner's manual (opens in a new tab), useful for starting the generator right away, the Generac GP15000E's package also includes these accessories: tool kit and funnel.

Emissions

The Generac GP15000E is EPA approved, but NOT CARB-compliant. Thus, it cannot be purchased or sold in California.

However, it features a spark arrestor, so it is adequate for use in forested areas.

Product Video

The Generac GP15000E versus other generators

The following charts are provided to give you an idea of how some of the key specs of the Generac GP15000E compare to generators of similar power (between 14000 and 20000 W).

  • As far as its dry weight is concerned, the Generac GP15000E weighs just 363 pounds and thus, it is one of the lighter 14000 to 20000 rated wattage generators. If you are concerned by weight, one of the champions in the above-mentioned power range is the Lifan LF15000-EPL, with a dry weight of just 358 pounds.
  • As the GP15000E offers around 10 hours run time on a full tank at a 50% load, it falls within the average autonomy range among the generators of a similar power. If autonomy is your priority, one of the devices of a similar power output with the highest run time is the Lifan LF15000-EPL, reaching around 12 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 has an average fuel consumption among comparably powerful devices, as it reaches 1.6 GPH (gallon per hour) at a 50% load. If you wish to further improve in the area of fuel efficiency, the Lifan LF15000-EPL, which boasts with a gas consumption of only 1.17 GPH, may be the right generator for you.

Price comparison

As you can see from this interactive chart, when compared to other 14000-20000W generators, the Generac GP15000E 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
  • Several accessories included
  • GFCI Outlets
  • Electric start
  • Lightweight for its kind (363 lbs)
AVERAGE SPECS:
  • Decent run time
  • Decent fuel efficiency
WEAKNESSES:
  • No recoil back-up
  • No remote start
  • Not CARB-compliant

Do you own the Generac GP15000E 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
Engine992 cc Generac OHVI 4-stroke
Starting systemElectric
Power
VoltageAC: 120/240V 60 Hz, DC: 12V
Running watts15000 W
Starting watts22500 W
Running amps (@120/240V)125/62.5 amps
Peak amps (@120/240V)187.5/93.8 amps
Run time @50% load10 h
Run time @25% loadUnknown
Features
GFCI outletsYes
Covered outletsNo
Automatic Voltage RegulationYes
AC outlets
  • 1x Duplex 120V 20A (5-20R) GFCI
  • 1x Duplex 120V 20A (5-20R)
  • 2x 120V 30A (L5-30R)
  • 1x 120/240V 30A (L14-30R)
  • 1x 120/240V 50A (14-50R)
DC outlets1x 12V 10A receptacle
Data centerLifetime run hours
IndicatorsNo
Fuel tank16 gal
Fuel gaugeYes
Misc
Weight363 lbs
Approx. dimensions (L x W x H)48.5 x 31 x 39.5 in
Noise (lower limit)Unknown
THD< 20%
EmissionsEPA
SecurityLow oil and overload protection
Spark arrestorYes
NeutralFloating
Accessories includedFunnel, tool kit, battery, and wheel kit
Warranty2 years
Other model numbers5734

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

Warranty Information

The Generac GP15000E 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 homeSump pump (1/2 hp)10502150
Furnace fan (1/2 hp)8752350
Refrigerator (energy star)1921192
Clothes dryer54006750
Electric range21002100
Hair dryer18001900
Blender400850
Security system180180
Total11997 W13472 W
For workElectric welder90009000
Table saw18004500
Belt sander11502400
Total11950 W14650 W
What is the noise rating of the GP15000E?

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

Oil capacity? (Asked February 15, 2020)

With filter change, 54.4 fl. oz. Without filter change 44.8 fl. oz.

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