Home > All Products > Generators > Portable Generators > GP Series > GP15000E
main product image


Model #5734

Starting At

$3,249.00 MSRP
Where To Buy

Add to My Products

Generac GP Series 15000E Portable Generator

A portable unit ideal for applications requiring a large amount of power without being permanent. Ideal for job sites and emergency applications.

Generac's OHVI® engine incorporates full pressure lubrication with automotive style spin on oil filter for longer life engine.

Idle control reduces noise and conserves fuel for extended run-times.

Hour meter tracks maintenance intervals.

Low-oil pressure shutdown automatically safeguards engine from damage.

Large-capacity fuel tank with incorporated fuel gauge provides durability and extended run times.

1 1/4" steel tube cradle for added durability and strength.

Integrated lifting eye for easy transport and security on the job site.

Generac <strong>GP Series 15000E</strong> Portable Generator

The Power to Live. Work. Play.

Portable generators are a welcome addition to many activities at home, at work, and away. In an emergency, portable generators can provide critical backup power. They make camping and tailgating more comfortable. And contractors appreciate the flexibility portable power brings to the jobsite.

GP Series Accessories

Maximize your investment and maintain your Generac portable generator with a variety of accessories.

Generac values your feedback!

When writing your review, please consider the following guidelines:

  • Prior to providing a review, refer to a product’s documentation to ensure that unit is being used and maintained properly
  • Alluding to issues incurred in the wake of negligent maintenance or improper use will void review submissions
  • Focus on your experience with the product and its features
  • Provide details about why you liked or disliked a product
  • Reviews submitted for products other than those listed will be rejected immediately
  • Any product reviews referencing independent authorized dealers, service providers, or retailers by name will NOT be posted. (Dealer reviews can be provided here)
  • All submitted reviews are subject to the terms set forth in our Terms of Use

We reserve the right not to post your review if it contains any of the following types of content or violates other guidelines:

  • Obscenities, discriminatory language, or other language not suitable for a public forum
  • Advertisements, “spam” content, or references to other products, offers, or websites
  • Email addresses, URLs, phone numbers, product serial numbers, physical addresses or other forms of contact information
  • Critical or spiteful comments on other reviews posted on the page or their authors

If you wish to share feedback with us about product selection, pricing, ordering, delivery, or other customer service issues, please do not submit this feedback through a product review. Instead, contact us directly.

Enjoy writing your review!

Rated 5 out of 5 by from Best portable generator Have owned this unit for 16 years. Very particular about maintenance, so it has never let me down, always starts first try. Big enough to power entire house, including central a/c. Ran for 55 hours straight in Hurricane Irma 2017. Annually, just before Hurricane season, do oil & filter, spark plugs & air filter. Only store with non-ethanol fuel, and run carburetor dry at shutdown. Lives in garage under a large cover, looks like day I bought it.
Date published: 2021-09-05
Rated 5 out of 5 by from Generac reputation This is my second Generac generator. The first one that I had lasted over 14 years. I sold it because after we sold our house, the new one we purchased was larger, and the 6500 w we used could not power the entire house. So, I sold it for a good price, because it was a Generac, it has a reputation for quality that lasts. This new generator GP15000E has the power to power the entire house! It is heavy, but because it has a solid cage frame on pneumatic wheels, (located in a balanced location) it is fairly easy to move. All the controls are easy to reach and read, and with the electric start, it is effortless! The only drawback is the noise factor, however, almost all gasoline generators are noisy! If this one lasts like the last one, I will have it for a long, long time!
Date published: 2021-04-04
Rated 5 out of 5 by from emergency power Very nice generator, runs well and not as noisy as I thought. I haven't had to use it in an emergency as of yet but I am certain it will perform to my expectations.
Date published: 2021-04-02
Rated 3 out of 5 by from GP15000 Surges I've had this generator a while, it has always surged when a load was applied. I have a factory service manual.Generac would not let me speak to a tech to further diagnose it, they tell me I have to take it to a service shop. I am afraid the shop will throw parts at it until it is fixed, assuming they do not replace everything.
Date published: 2021-03-26
Rated 3 out of 5 by from A workhorse I bought THIS generator because of the past experience with the brand, AND because this unit had a larger engine than most of the similarly sized generators. The typical 15kw genset has an 18 to 22 horsepower engine. This model has a 30hp engine!! That extra horsepower means greater power margin for starting loads like HVAC compressors. I calculated that I needed 10kw, and this units 22kw starting capacity exceeded that substantially... But in my experience I need more than the minimum because if the hvac computer crashes because of voltage drop, then starting will fail. You mush have excess power during the starting of the compressor to keep the computers happy. So I picked carefully, and while this one has much more power than I require, the price point and performance thresholds were met by *only* this generator. So I did my first test running the whole house, and this generator handled the load with few problems, but the power was very noisy, very high harmonic distortion. Some things in the house ran fine, but things powered on transformers did not like the power. The home thermostat was inoperable, the computer in the dishwasher crashed, several of the UPS systems did not like the power and complained, and my smart LED lights were very unhappy. Sensitive loads did not like this generator at all... But once I got the thermostat bypassed, the HVAC compressor seemed to run fairly well, though the compressor was noisier than normal. So to meet my needs I decided to buy the largest inverter generator that I could fine to run the house and electronics, and the Generac GP15000E is dedicated to the HVAC compressor *only*. The HVAC blower and electronics run on the inverter generator where they are fed a true sine wave. I didn't set out to buy this much excess capacity, but I still paid less than I would have if I had bought a similarly sized whole home generator, and I have a reconfigurable power plant now so I can handle any need.
Date published: 2021-03-13
Rated 5 out of 5 by from Old Reliable!!! We have had this unit going on 7 years now. Used it on and off over years. Never missed at beat!!!!. Fired right up after being stored outside in a deck box in zero degrees at our old house one winter. It lives inside the garage now at our current house. It's comforting to know that this unit works as well as it does. Plenty of power that's for sure. As a matter of fact we just got done using it today during a power outage due to a recent ice storm. It's easy to transport as well even being as large as it is. My wife that's 5'5 can move it around with ease. You can't go wrong with it.
Date published: 2021-02-14
Rated 5 out of 5 by from Great improvement over my previous 5000 watt gen. Ran under load for first time today. It ran like a Rolls Royce and I only had part of my system turned on. I am confident it will handle all the load we need it to handle for our 2600 sq. ft. No worries about utility power failure anymore.
Date published: 2020-12-12
Rated 5 out of 5 by from Great stand by generator. I bought this unit as a whole house backup generator. It has not let us down. Last year while camping got a text from the power company saying power was out at the house. We came home and I fired the genny and it ran very well with the central ac and refrigerator and freezer all running at the same time. Power was restored about 5 hours later. If not for the backup we would have lost over a thousand dollars worth of food.
Date published: 2020-04-17
  • y_2021, m_10, d_24, h_19
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.19
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_69
  • loc_, sid_gp15000, prod, sort_[SortEntry(order=FEATURED, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_generac
  • bvseo_sdk, net_sdk,
  • CLOUD, getReviews, 0ms
GP15000E is rated 4.7 out of 5 by 69.
  • y_2021, m_10, d_24, h_19
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.19
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_69
  • loc_, sid_gp15000, prod, sort_[SortEntry(order=FEATURED, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_generac
  • bvseo_sdk, net_sdk,
  • CLOUD, getAggregateRating, 37ms