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
- Small homeowners in search of a full power backup solution
Power & Run Time
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 15,000W and a peak wattage of 22,500W.
This generator gets running thanks to a simple and elegant electric starter (battery included).
With a full tank, the GP15000E can operate for around 10 hours at 50% load (fuel consumption around 1.6 GPH), thanks to its fuel capacity of 16 gallons.
The quite high THD (<20%) of the GP15000E makes it unsuitable for powering sensitive electronic devices.
The control panel features the upcoming 8 AC outlets:
It also sports 1 DC outlet: there's a 12V 10A receptacle with which charging your batteries is made easy.
Even if this Generac generator isn't quite RV Ready, it still allows for an easy RV connection via an L5-30P to TT-30R adaptor, thanks to its L5-30R receptacle. Besides, since the GP15000E bears a twist-lock L14-30R receptacle, it is transfer switch ready: it is easily connectible to a breaker box and can power your home in case of a power outage.
The Generac GP15000E has a conventional, open frame design, of the following dimensions: L48.5 x W31 x H39.5 in, which offers support and allows it to be raised above ground level. The design is ideal for rough environments and demanding outdoor use.
As the generator's weight is 363 pounds, manually moving it or transporting it may be challenging, despite the fact that it is technically considered 'portable' (movable). Still, once it is on the ground, its wheel kit (⌀12.3") and its handle can easily solve the issue of low mobility and allow for easy relocation of the device.
Further safety during transport, loading and unloading of the device is provided by a lift hook, which is placed on the top of the generator's frame.
The control panel of the GP15000E includes a digital data center, which assists you in monitoring its status and activity, as it provides information on the lifetime run hours.
A built-in fuel gauge allows for a quick, easy and convenient check of the fuel level of the generator.
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.
Apart from the typical documentation and an owner's manual (opens in a new tab), which lets you start it right away, the Generac GP15000E also is packed along with the following accessories: tool kit and funnel.
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.
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).
- Regarding its weight, the Generac GP15000E only weighs in at 363 pounds, which means it's one of the lightest generators in the 14000-20000 rated wattage range.
- 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. 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.
- While the run time is an important parameter, it is dependent on the fuel tank’s capacity and thus, doesn’t say much on its own unless we consider fuel consumption as well. With an estimated gasoline consumption of 1.6 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 fuel consumption is your top priority, we suggest to check out the Westinghouse WGen20000, which has a fuel consumption of only 1.56 GPH and thus, is one of the most efficient devices in our database.
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
- Several accessories included
- GFCI Outlets
- Electric start
- Lightweight for its kind (363 lbs)
- Fuel efficient
- Decent run time
- No recoil back-up
- No remote start
- Not CARB-compliant
Features and Specifications
|Engine||992 cc Generac OHVI 4-stroke|
|Voltage||AC: 120/240V 60 Hz, DC: 12V|
|Running watts||15,000 W|
|Starting watts||22,500 W|
|Running amps (@120/240V)||125/62.5 amps|
|Peak amps (@120/240V)||187.5/93.8 amps|
|Run time @50% load||10 h|
|Run time @25% load||Unknown|
|Automatic Voltage Regulation||Yes|
|DC outlets||1x 12V 10A receptacle|
|Data center||Lifetime run hours|
|Fuel tank||16 gal|
|Approx. dimensions (L x W x H)||48.5 x 31 x 39.5 in|
|Noise (lower limit)||Unknown|
|Security||Low oil and overload protection|
|Accessories included||Funnel, tool kit, battery, and wheel kit|
|Other model numbers||5734|
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 made in the USA. However, the company provides no information about the origin of their components.
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?
|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|
|Total||11997 W||13472 W|
|For work||Electric welder||9000||9000|
|Total||11950 W||14650 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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