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Generac GP15500EFI - 15500/19300W Portable Generator With Electric Start And EFI Engine

The Generac GP15500EFI (7705) is a powerful open frame generator with a rated wattage of 15,500 W and a starting wattage of 19,300 W. (Read full specs)

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Generac GP15500EFIGenerac GP15500EFI
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Price history for the Generac GP15500EFI
Highest Price
$4,614.99
Lowest Price
$3,999.00
Current Price
$3,999.00

Description

From emergency home backup to DIY projects to the jobsite, the Generac GP15500EFI portable generator provides high wattage, dependable portable power. (source: Generac (opens in a new tab))

Zoom on the Generac GP15500EFI

In short, the Generac GP15500EFI is a powerful portable generator adequately designed for:

  • Professionals in need of safely powering high-intensity work or lighting equipment
  • Prudent homeowners who want a backup power source in case of a power outage

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

Generac GP15500EFI is equipped with a 816 cc Generac G-Force OVHI 4-stroke engine, running on gasoline and providing 120/240V, boasting a running wattage of 15,500W alongside a starting wattage of 19,300W.

This generator is started via an intuitive and practical electric starter (battery included).

The Electronic Fuel Injection (EFI) system enhances the engine's reliability, lowers fuel consumption, improves startup, reduces servicing, boosts stale fuel resistance, and offers better altitude adaptability.

Featuring a 14.2 gallons fuel tank, the GP15500EFI can provide power for around 11 hours at 50% load on a full tank (with fuel consumption averaging 1.29 gallons per hour).

The <5% Total Harmonic Distortion (THD) of the GP15500EFI ensures a clean sine wave output, providing a secure power source for your sensitive electronics through its AC outlets.

Outlets

The control panel is equipped with the following 7 AC outlets:

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

This Generac generator features an L5-30R receptacle, enabling an easy RV connection via an L5-30P to TT-30R adaptor. However, it is still not quite RV ready. Besides, since it boasts a twist-lock L14-30R receptacle, the GP15500EFI is engineered to be transfer switch ready, ensuring easy integration with your breaker box to provide backup power to your home during outages.

Portability

At L58.5 x W30.9 x H36.5 in, the standard open frame design of the Generac GP15500EFI delivers stability alongside easy maintenance access to components and good air cooling. The featured design is ideal for the outdoors and all tough environments.

As the generator's weight is 420 pounds, manually moving it or transporting it may be challenging, despite the fact that it is technically considered 'portable' (movable). However, the constrained maneuverability is addressed with the assistance of its wheel kit (⌀12") and its folding handle, allowing for easy shifting once the generator is placed on the ground.

Features

Panel of the Generac GP15500EFI

The GP15500EFI's control panel

Embedded in the control panel of the GP15500EFI, a digital data center serves as a vital feature, offering comprehensive information on the lifetime run hours to aid in monitoring activity and status.

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

Regarding security, the generator comes with an overload protection (circuit breaker) and an automatic low oil shut-off, providing peace of mind during operation.

The GP15500EFI 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.

In addition to the standard documentation and the user manual for prompt setup, Generac has also included accessory] in the packaging of the GP15500EFI.

The Generac GP15500EFI versus other generators

The following charts are provided to give you an idea of how some of the key specs of the Generac GP15500EFI compare to generators of similar power (between 14000 and 20000 W).

  • With a dry weight of 420 pounds, the Generac GP15500EFI finds itself in the expected weight range for generators able to produce between 14000 and 20000 rated watts. If weight is your top priority, one of the champions in this power category is the Genmax GM17000iE, weighing just 308.6 pounds.
  • The GP15500EFI provides one of the highest run time among similarly powerful devices, reaching around 11 hours at 50% load.
  • Run time is crucial, but it heavily relies on the fuel tank's capacity. Thus, considering fuel efficiency alongside is essential. With an estimated gasoline consumption of 1.29 GPH (gallon per hour) at 50% load, this generator is among the more fuel-efficient of the products in the above-mentioned wattage range. If minimizing fuel usage is one of your key priorities, the Westinghouse WGen14500DFc is one of the most efficient devices with similar power output, with a gasoline consumption of only 0.95 gallons per hour.

Price comparison

As you can see from these interactive charts, when compared to other 14000-20000W generators, the Generac GP15500EFI is on the expensive side of the price range.

While certainly not the cheapest of its kind, purchasing it would most likely also mean enjoying the reliability of a high-end product.

The bottom line

STRENGTHS:
  • COsense® technology
  • GFCI Outlets
  • 4 different AC outlet types
  • G-Force engine made in USA
  • Electric start
  • Clean sine wave
  • Electronic Fuel Injection
  • High run time
  • Fuel efficient
AVERAGE SPECS:
  • Decent weight (420 lbs)
WEAKNESSES:
  • On the expensive side
  • No recoil back-up
  • No remote start

Do you own the Generac GP15500EFI 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
Engine816 cc Generac G-Force OVHI 4-stroke
Starting systemElectric
Warranty3 years
Power
VoltageAC: 120/240V 60 Hz
Running watts15,500 W
Starting watts19,300 W
Running amps (@120/240V)129.2/64.6 amps
Peak amps (@120/240V)160.8/80.4 amps
Run time @50% load11 h
Run time @25% loadUnknown
Features
GFCI outletsYes
Covered outletsYes
Automatic Voltage RegulationYes
AC outlets
  • 2x Duplex 120V 20A (5-20R) GFCI
  • 1x 120V 30A (L5-30R)
  • 1x 120/240V 30A (L14-30R)
  • 1x 120/240V 50A (14-50R)
DC outletsNo
Data centerLifetime run hours
IndicatorsNo
Fuel tank14.2 gal
Fuel gaugeYes
Misc
Weight420 lbs
Approx. dimensions (L x W x H)58.5 x 30.9 x 36.5 in
Noise (lower limit)Unknown
THD< 5%
ComplianceEPA
SecurityLow oil and overload protection, CO monitoring
Spark arrestorYes
NeutralBonded to frame
Accessories includedOil, battery, and wheel kit
UPC696471083705

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 GP15500EFI 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 sizer.
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
Washing machine9001650
Set of 5 LED light bulbs5555
Cell phone charger2020
Total12392 W13867 W
For workElectric welder90009000
Table saw18004500
Grinder14002500
Bug zapper8080
Total12280 W14980 W
What is the noise rating of the GP15500EFI?

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

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