Zoom on the Generac GP15500EFI
In summary, the Generac GP15500EFI is a powerful portable generator especially useful for:
- Professionals who want to be able to deliver results, even during a power failure
- Small homeowners in search of a full power backup solution
In the sections ahead, the power characteristics, availability of various outlets, the portability, and any additional features of the device shall be discussed, including its emission compliance information.
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 convenient and easy-to-use 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.
Thanks to a fuel capacity of 14.2 gallons, the GP15500EFI can operate for around 11 hours at 50% load with a full tank (fuel consumption around 1.29 GPH).
The GP15500EFI generates a clean sine wave: providing <5% Total Harmonic Distortion (THD), delicate electronics can be plugged in its AC outlets safely.
The control panel includes the following 7 AC outlets:
Even though this Generac generator isn't quite RV Ready, its L5-30R receptacle allows an easy RV connection via an L5-30P to TT-30R adaptor. Besides, due to the featured twist-lock L14-30R receptacle, the GP15500EFI is transfer switch ready: you may connect it to a breaker box to power your household during a power outage.
With its dimensions of L58.5 x W30.9 x H36.5 in, the conventional, open frame design of the Generac GP15500EFI 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.
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). Nevertheless, it can still be moved quite conveniently with the help of its wheel kit (⌀12") and its folding handle, once it is placed on the ground.
One of the many GP15500EFI'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.
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 automatic low oil shut-off and an overload protection (circuit breaker), allowing you to use it with a peace of mind.
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.
Besides the usual set of documentation and owner's manual (opens in a new tab) to get you promptly started, Generac also included some oil in the GP15500EFI's packaging.
The Generac GP15500EFI 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.
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).
- As for its weight, the Generac GP15500EFI weighs only 420 pounds, making it one of the lighter generators in the 14000-20000 rated wattage category. If you are concerned by weight, one of the champions in the above-mentioned power range is the Generac GP15000E, with a dry weight of just 363 pounds.
- As the GP15500EFI features an autonomy of around 11 hours at 50% load, it has one of the highest run times in comparison to the other generators of its power range.
- 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 can be considered as one of the most fuel efficient, due to its low estimated fuel consumption of only 1.29 GPH (gallon per hour) at 50% load, within the aforementioned wattage range.
As you can see from this interactive chart, 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
- 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
- On the expensive side
- No recoil back-up
- No remote start
- Not CARB-compliant
Features and Specifications
|Engine||816 cc Generac G-Force OHV 4-stroke|
|Voltage||AC: 120/240V 60 Hz|
|Running watts||15,500 W|
|Starting watts||19,300 W|
|Running amps (@120/240V)||129.2/64.6 amps|
|Peak amps (@120/240V)||160.8/80.4 amps|
|Run time @50% load||11 h|
|Run time @25% load||Unknown|
|Automatic Voltage Regulation||Yes|
|AC outlets|| |
|Data center||Lifetime run hours|
|Fuel tank||14.2 gal|
|Approx. dimensions (L x W x H)||58.5 x 30.9 x 36.5 in|
|Noise (lower limit)||Unknown|
|Security||Low oil and overload protection, CO monitoring|
|Neutral||Bonded to frame|
|Accessories included||Oil, battery, and wheel kit|
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.
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.
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?
|Item||Running Watts||Starting Watts|
|At home||Sump pump (1/2 hp)||1050||2150|
|Furnace fan (1/2 hp)||875||2350|
|Refrigerator (energy star)||192||1192|
|Set of 5 LED light bulbs||55||55|
|Cell phone charger||20||20|
|Total||12392 W||13867 W|
|For work||Electric welder||9000||9000|
|Total||12280 W||14980 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.
Couldn't find the right answer for you? Ask your own question.