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Model # 5734
MSRP: $2,872.00
Every Day Price: $2,399.00
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Avg. Product Review Rating: 4.7/5 (based on 7 reviews - read reviews) Write a Review - $10 Store Credit

Generac Portable GP Series GP15000E Electric Start

  • The Generac 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
  • Large-capacity fuel tank with incorporated fuel gauge provides durability and extended run times
  • Low-oil pressure shutdown automatically safeguards engine from damage
  • Hardened 1 1/4" steel tube cradle for added durability and strength
  • Integrated lifting eye for easy transport and security on the job site


Generac Power Systems 5734 Details and Specifications

Generac Portable GP Series GP15000E With Electric Start

Generac GP Series portable generator supplies power that can meet the challenges of everyday needs at home and on construction sites   The 15000E provides up to 15 kilowatts of continuous power and a maximum of 22.5 kilowatts of startup power for electric motors.

Emissions Certification: Not for sale in California, 49 State Only

Not for Sale in Canada

Essential Features

    •  Electric Start provides smooth, trouble-free engine cranking and starting.
    •  6 AC receptacles including GFCI with circuit breakers. DC outlet for battery charging.
    •  16 Gallon Fuel Tank provides up to 10 hours of runtime at 50 percent load.
    •  Pressurized Lubrication system with low-oil shutdown keeps critical parts lubricated.
    •  Idle Control saves fuel and reduces noise. Slower engine speed reduces costs, extends life.
    •  Hour Meter tracks use and provides alerts for timely maintenance.
    •  Lifting Eye Simplifies loading and unloading and provides security at job sites.

Output Control Panel

Receptacles are protected by circuit breakers to protect cords and prevent overloading. The 50-amp, 120/240 volt receptacle is protected by a toggle-type circuit breaker. All other AC receptacles have pushbutton-type breakers. The 12-Volt DC charging outlet is current limited to 10 amperes. 30-Amp and 50-Amp receptacles require the correct generator cables for use (sold separately).

    •  (2) 120V 20-Amp 5-20R Duplex receptacles (one GFCI) provide up to 2400 watts of power each.
    •  (2) 120V 30-Amp L5-30R Twist Lock receptacles provide up 3600 watts of power each.
    •  (1) 125/250V 30-Amp L14-30R Twist Lock  receptacle for up to 7200 watts of power.
    •  (1) 125/250V 50-Amp 14-50R supplies 12,000 watts of power
    •  (1) 12-Volt, 10-Amp outlet allows battery charging using the included clip on battery cord.

This generator has ground bonded to neutral and tied to the generator frame. Additional grounding lugs bonded to the frame allow connection to suitable earth grounds rods.

Generac OHVI Engine

The 992cc OHVI engine was specifically designed for the demands placed on a portable generator engine. The fully pressurized lubrication system is similar to that used in automobiles and includes a spin-on automotive filter and automatic low-pressure shutdown to prevent engine damage. Oil is pumped directly to critical engine parts including bearings and valve lifter rods to ensure full lubrication during and after startup.

Plasma filled moly rings and plateau honed cylinders reduce oil consumption, provide better heat dissipation, and extend engine life.

The fuel system features a fuel-line shut off switch and pull-type choke. A push-button electric starter cranks the engine for smooth starts.

While under load, the engine operates at 3600 RPM. With the idle-control switch is set to on, it slows to 2100 RPM when the load is removed.


The GP15000E is mounted on a 1 1/4-inch tubular steel frame with two wheels and handles for easy maneuvering and placement. The output control panel, mounted under the handlebars, provides easy access to circuit breakers and receptacles. The durable resin fuel tank sits on top of the unit for easy access and fueling. Unit weight is 363 pounds.


Shipped with a 2-year limited consumer warranty or a 1-year limited commercial warranty.

Product Specifications

Model Number 5734
Manufacturer Generac Power Systems
Made In USA Yes
Rated Watts 15kW
Surge Watts 22.5kW
Rated Amps 62.5
Surge Amps 93.8
Voltage 120/240V Single Phase
A/C Ton Rating 2 - 4 Ton
Enclosure None
UL Listed Yes
Starting System Electric
Low Oil Alert Low Oil Pressure Shutdown
Idle Control Yes
Receptacles 12V DC 1 – 10 Amp Battery Charger Input
1 – 20 Amp 5-20R GFCI Duplex
1 – 20 Amp 5-20 Duplex
2 – 30 Amp Amp L5-30 Twistlock
1 – 30 Amp L14-30R Twistlock
1 – 50 Amp 14-50R
Fuel Gauge Yes
Portability Kit Included
Hour Meter Yes
Product Weight 363 lbs.
Shipping Weight 425 lbs.
Dimensions (Inches) 48.5L x 30.75W x 38.5H
Engine Brand Generac OHVI
Engine Size 992 cc
Engine RPM 3600 RPM
Frequency 60 Hz
Auto Voltage Regulation Yes
Fuel Type Gasoline
Fuel Tank Material Resin
Fuel Tank Size 16 Gallons
Run Time (50% Load) 10 Hours
Warranty Information
Consumer Warranty 2 Years Limited
Commercial Warranty 2 Years Limited
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Product Reviews

  1. Nice generator and fast service

    Posted by Alan L on 28th Oct 2014

    The generator was shipped promptly and received as described in the information. Set it up and runs smoothly. This generator is just the thing for temporary power when the power goes out. Cooking, lights, AC, water heater, etc. work fine.

  2. looks awesome and ready to work!

    Posted by Bill V on 7th Jan 2013

    Waited a while but finally got it! looks awesome and huge! can't wait to use it. 2 times the size i had. shipping was good and packaging was good! unpackaged it fueled and oiled it and presto started right up. again can't wait to use it. like a kid in a candy store! thanks!!

  3. Perfect generator

    Posted by Unknown on 26th Nov 2012

    this generator is amazing i used it during power outages and its so quiet and is so helpful

  4. huge generator but quite

    Posted by andrew m on 21st Jul 2012

    purchased generator 7\7\12 received 7\16\12 didnt get a chance to put together till 7\21 just got done putting tires and oil in. manual says oil level is full when oil is to threads on oil fill hole but i put 1qt in and checked still low added more checked still low sow put 2 qts in was still not up to threads but was over full had to drain some out. finally got everything kosher oil and gas in opened fuel shut off valve turned on idle controll pushed start button fired right up, let idle for a few minutes then turned idle controll off waiting to hear this loud engine but supprisingly is very quite. have not got to try it yet have to find electrician to hook up to house, reason for 4 stars is because of the oil ordeal overall great generator will post another rating when get to use.

  5. Power Outages - Not a worry anymore!

    Posted by Unknown on 1st Nov 2011

    Bought this generator after Hurricane Irene. Runs the entire house - well pump, furnace, 2 refrigerators, TV's, Dishwasher, Washer, Dryer, electric stove ... no problems. I am now the envy of my neighbors. I would recommend this to anyone who wants a quick and efficient reliable power source to get through their next power outage.

  6. No more powerfailures!

    Posted by Eric on 31st Oct 2011

    After Hurricane Irene, I was finally able to convince my wife we needed one of these- only issue- electric hot water heater, well pump, electric heat (but a woodstove takes care of that). We needed a generator that had a 50amp outlet. This was the "smaller" one.

    We just had our october snow storm w/ leaves still on the trees. It works! We had the majority of our house powered for almost 48 hrs. I thought it was going to be two more days, but this thing was awesome. Starts right up, even my wife thought it was easy.
    The extra oil filter, oil, air filter are a nice touch. UPS freight was a pleasure to work with and I was able to get the wheels on working by myself (with the help of some wooden blocks). It's big, really big, but it works.

  7. Great Generator!

    Posted by Shawn S on 18th May 2011

    I purchased this after going thru Hurricane Andrew. Never again- will we go without power! I have used this as my backup & have been thru three other hurricanes- this generator came thru with flying colors!
    Without a question- I recommend this generator!

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Shipping Terms

All generators include 24 hour delivery notification and residential delivery. Liftgate service is available on all air-cooled generators and some liquid cooled units – Please call for verification. Free Shipping is curbside service only. Curbside service means the freight company will deliver to your address and lower your generator to the ground. The freight company will not back down driveways, place a generator in a building or where it is being installed. You are responsible for arranging the movement and setting of the generator.

Some restrictions apply to "Free Shipping" you may either view our
Shipping Information page or contact us for details.