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

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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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 who want to ensure that a power failure will not prevent them from working
  • Prudent homeowners who want a backup power source in case of a power outage

Over the following sections, you'll uncover its power characteristics, the selection of outlets it offers, its overall portability, and the supplementary features it includes.

Power & Run Time

The Generac GP15500EFI is powered by a 816 cc Generac G-Force (opens in a new tab) OHV 4-stroke engine. It delivers 120/240V, runs on gasoline and offers a running wattage of 15,500W as well as a peak wattage of 19,300W.

This generator features a practical and straightforward 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.

The GP15500EFI can operate for around 11 hours at 50% load with a full tank (fuel consumption around 1.29 GPH), due to its fuel capacity of 14.2 gallons.

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 features 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

While not classified as 'RV Ready,' this Generac generator can still provides the advantage of RV connection via its L5-30R receptacle, ensuring power supply to your RV with an L5-30P to TT-30R adaptor. Besides, the GP15500EFI's twist-lock L14-30R receptacle makes it transfer switch ready, enabling hassle-free connection to your breaker box for powering your home during outages.

Portability

At L58.5 x W30.9 x H36.5 in, the Generac GP15500EFI boasts a traditional open frame structure, ensuring stability and allowing for convenient maintenance access to components, promoting air circulation. The design is ideal for rough environments and demanding outdoor use.

Though weighing 420 lbs, the generator remains classified as 'portable,' indicating its capability to be moved, though its weight could pose transport challenges. Nevertheless, thanks to its wheel kit (⌀12") and its folding handle (a decent solution to its lack of maneuverability), the generator can be easily moved, once placed the ground.

Features

Panel of the Generac GP15500EFI

The GP15500EFI's control panel

The control panel of the GP15500EFI includes a digital data center, which assists you in monitoring its status and activity, as it provides information on the lifetime run hours.

The inclusion of a built-in fuel gauge in the generator streamlines gas level checks for quick and convenient assessments.

Security-wise, this product benefits from an automatic low oil shut-off and an overload protection (circuit breaker), which gives you a complete peace of mind when using it.

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.

Beyond the regular documentation and the user manual for quick start, Generac has 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).

  • Weight-wise, the Generac GP15500EFI has only 420 lbs, which renders it one of the lighter generators which produce 14000 to 20000 rated watts. Weight-conscious users may find the Generac GP15000E appealing, as it is one of the top contenders in this power range, weighing just 363 pounds.
  • In terms of run time, the GP15500EFI surpasses similarly powerful devices, boasting one of the highest run times at around 11 hours.
  • While run time is vital, it hinges on the fuel capacity. To grasp the full picture, we must also factor in fuel efficiency. This generator provides one of the best fuel efficiency among its peers of comparable power output, consuming approximately 1.29 GPH (gallon per hour) at 50% load.

Price comparison

As you can see from these interactive charts, when compared to other 14000-20000W generators, the Generac GP15500EFI 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
  • GFCI Outlets
  • 4 different AC outlet types
  • G-Force engine
  • Electric start
  • Clean sine wave
  • Electronic Fuel Injection
  • Lightweight for its kind (420 lbs)
  • High run time
  • Fuel efficient
WEAKNESSES:
  • 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 OHV 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.

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 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 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
Vacuum cleaner10751175
Security system180180
Total12397 W13897 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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