Model # 5734

Internet #100662532

Generac 15,000-Watt Gasoline Powered Portable Generator with OHVI Engine


15,000-Watt Gasoline Powered Portable Generator with OHVI Engine

  • Efficient, industrial-grade engine provides extended run times
  • Low oil shutdown safeguards engine from damage
  • Electronic ignition provides easy start up
$2,399.00 /each

Frequently Bought Together

Product Overview

Featuring never-flat wheels, low-tone mufflers and low-oil shutdown, the Generac GP 15,000-Watt Gasoline Powered Portable Generator with OHVI Engine offers quiet, dependable performance when you need energy. An idle control increases fuel efficiency and the included wheel kit and lifting eye allow for effortless transportation. The super-efficient OHVY engine offers extended runtimes for use at jobsites or for backup power sources.

  • 16-gallon fuel tank runs the generator continuously for up to 10 hours at half load; idle control for improved fuel efficiency
  • OHVI engine is designed for extended run times for use at jobsites or for an emergency backup power source
  • Circuit breaker protected outlets for added safety
  • Low-tone mufflers offer whisper-quiet operation
  • Fuel gauge keeps you informed of fuel levels
  • Electronic ignition for easy start up
  • Never-flat wheels and included wheel kit and lifting eye for easier transport
  • 15,000-watt running and 22,500-watt peak power provides reliable power on the go
  • Click on the more info tab to download the specifications pdf to view the wattage requirement guide

Info & Guides

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Warranty / Certifications

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Customer Questions & Answers

what is the NEMA number on the plug?

Asked by: chaser
Generac’s GP15000E portable generator, model number 5734, comes with two 20A, 120V 5-20R Duplex outlets (protected by one 20A 1-Phase circuit breaker; one 20A 120V 5-20R GFCI Duplex outlet (protected by one 20A 1-Phase circuit breaker), one 30A 125/250V L14-30R Twist Lock Outlet (protected by one 30A 1-Phase circuit breaker), one 125/250v 14-50R outlet (protected by one 30A 1-Phase circuit breaker), and two 30A, 120V L5-30R outlets, (both protected by 30A 1-Phase circuit breakers). To inquire about one of the multiple plugs featured on a GP15000 portable generator, or any other product, please contact us directly at 888-GENERAC (436-3722).
Answered by: Generac
Date published: 2015-09-20

which model has the 3 phases for portable generator

Asked by: Anonymous
Not many portables, mainly stationary standby units. Subaru RGV13100T is one exception.
Answered by: PeterH845
Date published: 2015-09-17

Can a cable be made or purchased to convert two L5-30R receptables to an additional L14-30R?

Most transfer switches have at most 10 circuits. I want to install two separate 10-circuit 30A transfer switches each with its own L14-30P power inlet to get a total of 20 circuits. Obviously the G15000e L14-30R receptacle can be connected directly to one of the L14-30P power inlets with a standard cable. I would like to use the G15000e two L5-30R receptacles to connect to the other L14-30P power inlet. This would give me full use of the 60 AMP capability of the generator. Can a cable be made or preferably purchased that would do this? It seems to me that it's a design flaw not to provide two L14-30R receptacles on the G15000e instead of just the one. All the other receptacles are basically useless since anyone purchasing a 15000 watt generator is basically trying to run as much of the house as possible. This means you need lots of circuits. My circuit breaker panel has 40 circuits.The 60A capability of the generator would be most accessible through two L14-30R receptacles.
Asked by: psychoboomer
We would not recommend attempting to modify your portable generator or any of its associated outlets; doing so would be considered a product modification and would thereby void your warranty. If you have any other product-related inquiries, please contact us directly at 888-GENERAC (436-3722).
Answered by: Generac
Date published: 2015-09-20

How loud is this generator?

Asked by: Anonymous
This generator is not loud at all my lawn mower makes more noise.
Answered by: James
Date published: 2016-08-29

how to start this generator

dont have the manual for it some one as misplace it
Asked by: Richie
Yes, a full manual PDF version can be viewed by clicking on the Full Product Manual under the Info & Guides section located just to the right of the Product Overview.
Answered by: CommunityAnswer
Date published: 2016-02-13


Asked by: Anonymous
The portable generators are not evaluated for operational volume.
Answered by: Anonymous
Date published: 2015-09-20

I currently run a smaller generator, 5500, would i be able to run this generator using the same cable or would i need to get a different cable.

Asked by: Cappi
You probably have a 30 amp cord presently and yes, depending how much larger your next generator is, you could need a considerably larger gauge cable. The larger generator will feed electricity through the smaller wire but you won't be able to run a larger selection of higher draw items simultaneously.
Answered by: 24Carat
Date published: 2016-04-01


! need with lenth and height plus weight on this generator
Asked by: Anonymous
The GP15000 has an assembled width of 30.75”, length of 48.50”, and height of 38.50”, and weighs 363 lbs.
Answered by: Generac
Date published: 2015-09-17
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Customer Reviews

15,000-Watt Gasoline Powered Portable Generator with OHVI Engine is rated 4.5 out of 5 by 80.
Rated 5 out of 5 by from Great buy Great buy for the price. After easy assembly, I tied it in to a recently purchased Generac Manual Transfer switch and ran most of my house Electrical requirements - including my downstairs A/C unit. I'm very pleased with this purchase.
Date published: 2016-10-11
Rated 5 out of 5 by from Great machine Had for over seven years never has let me down will run for days without a hiccup at full load
Date published: 2016-10-03
Rated 4 out of 5 by from Seems to be well built. Could use a volt meter. This is a fresh purchase so have not had a chance to operate it as of yet. Looks to be a well built machine and am hoping for a good experience owning it. My main concern is that I can plug it into my double throw auxiliary power and feed power to multiple buildings. The neutral bonding should allow for this. My past gen. Had neutral bonded to fram and would not function this way without throwing the breaker on the gen.
Date published: 2016-12-08
Rated 5 out of 5 by from Excellent Product. Just what we expected. We ordered this after Hurricane Matthew and being without power for 5 days. We went with the larger model based on price and recommendations. We are happy and quite pleased with our purchase. We highly recommend Generac! We are comfortable and assurance knowing we will now be better prepared.
Date published: 2016-12-11
Rated 5 out of 5 by from This product is very easy to assembly and use. This is a excellent product for a portable generator, it is large enough to run my entire house.
Date published: 2016-12-17
Rated 5 out of 5 by from Lot Of Bang For Your Buck! I purchased one of the older versions of the GP15000 and have used it in many different applications. Ranging from running out door sound, stage and lighting for various different music festivals I have help run to running an entire 3 BR 2 Bath house with a 3 ton AC unit. The engine used on these generators are easy to maintain and are extremely durable. With a huge 16 US Gal. fuel tank, I have had my generator run as long as 8 to 10 hours, depending on the load within my household, and last me an entire night running my stage setup I have. Love the fact that there is a lift point on the generator to be able to use lifting equipment like an engine hoist to pickup my generator and place in the back of my van to transport. (Generator weighs in over 350 pounds) I also love the feature of having the large inflatable wheels to move such generator around without having to exhaust a lot of energy. Plenty of standard household 5-20R duplex wall outlets (One of the 5-20R duplex outlet is GFI ) to having the mammoth L-14 50A 120/240V AC outlet for large loads. If you are ever in the market for a high power output generator and need it to be portable, The GP15000 and the GP-17500 is the go to power plant.
Date published: 2016-12-13
Rated 4 out of 5 by from Great I use my 17500 to run a Miller 252 might welder and it does great.
Date published: 2016-10-15
Rated 5 out of 5 by from Outstanding Product The generator arrived in perfect condition. The packaging was outstanding. It took about 20 minutes from the time it was it was uncrated until it was running. It was connected to my 2100 square foot home and it ran the whole house. That included a 5 ton AC, electric clothes dryer, lights, ceiling fans, chest freezer, refrigerator, water well pump and TV's..................the whole house. It never "bogged" down or missed a beat. Noise is moderate....but with doors and windows closed with the TV on I never noticed it. It came with an extra air filter, fuel filter, some Sta-Bil fuel treatment and 2 spark plugs which I thought was a very nice touch. It is heavy but well balanced and easy to move about. Great product for a reasonable price.
Date published: 2013-03-05
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