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Generac GP15000E - 15000/22500W Portable Generator

The Generac GP15000E (5734) is a powerful open frame generator with a rated wattage of 15,000 W and a starting wattage of 22,500 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 summary, the Generac GP15000E is a powerful portable generator especially useful for:

  • Professionals who want to be able to deliver results, even during a power failure
  • Homeowners who wish to power almost all appliances in their house under any circumstances

The following sections will present you in detail its power characteristics, the different outlets it offers, its overall portability, the extra features it benefits from, and any relevant emission compliance details.

Power & Run Time

The Generac GP15000E in use

The Generac GP15000E

The Generac GP15000E houses a 992 cc Generac OHVI 4-stroke engine, which provides 120/240V, consumes gasoline and delivers a running wattage of 15,000W along with a peak wattage of 22,500W.

The generator features 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 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

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

This Generac generator isn't quite RV Ready, but it features an L5-30R receptacle, allowing a simple RV connection through 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. This type of design is ideal for tough environments and heavy outdoor use.

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.

The generator comes with an additional safety feature, a lift hook on the top of its frame, which is helpful during its transport, loading and unloading.

Features

Panel of the Generac GP15000E

The GP15000E's control panel

One of the many GP15000E's features is the data center, included in its control panel, which conveniently provides information on the lifetime run hours and thus, helps you monitor its activity and status.

Thanks to a built-in fuel gauge, the generator allows you to quickly, conveniently and easily check the gas level at a glance.

From a security point of view, the generator is equipped with an overload protection (circuit breaker) and an automatic low oil shut-off, giving you a peace of mind during use.

With the basic documentation and an owner's manual (opens in a new tab), letting you start the generator quickly, the Generac GP15000E also comes with several accessories, including: funnel and tool kit.

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 and thus, may be used 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 lightest 14000 to 20000 rated wattage generators.
  • Given that the GP15000E reaches an autonomy of around 10 hours with a full tank and at 50% load, it is placed within the average autonomy range of similarly powerful generators. Concerning the run times, one of the several devices with a comparable output, offering the highest autonomy, is the Westinghouse WGen20000, which is able to run for around 11 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 reaches an estimated fuel consumption of 1.6 GPH (gallon per hour) at a 50% load, making it average, for the previously mentioned wattage range. If you wish to further improve in the area of fuel efficiency, the Generac GP15500EFI, which boasts with a gas consumption of only 1.29 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 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
  • 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
Parallel capableNo
RV readyNo
FuelGasoline
Engine992 cc Generac OHVI 4-stroke
Starting systemElectric
Warranty2 years
Power
VoltageAC: 120/240V 60 Hz, DC: 12V
Running watts15,000 W
Starting watts22,500 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%
ComplianceEPA
SecurityLow oil and overload protection
Spark arrestorYes
NeutralFloating
Accessories includedFunnel, tool kit, battery, and wheel kit
Other model numbers5734
UPC696471057348

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 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 wattage calculator.
ItemRunning WattsStarting Watts
At homeDish washer15003000
Microwave (1000 watts)15001500
Electric fry pan15001500
AC (10,000 BTU)15002200
Sump pump (1/2 hp)10502150
Refrigerator (energy star)1921192
Electric range21002100
Hair dryer18001900
Freezer8101750
Pair of small speakers4545
Total11997 W13497 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.

I read something about it not being good for electonic devices like computer maybe i read something wrong? (Asked February 08, 2022)

The unit is not suitable for powering equipment that contains sensitive electronic components. You may want to consider an inverter generator or a generator with a low THD. You may also want to read more about Total Harmonic Distortion (THD).

The replacement battery for a 15000 E generac generatore has to be 12 volts how many amps (Asked October 30, 2022)

The original battery part number is 0D4575, which is a 35Ah battery.

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