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Generac 5734 (15000 Running Watts) Review

Are you in need of an ultra-powerful generator that can handle home needs during power outages, along with demanding job site duties? That’s a tricky combination to find, but the Generac 5734, 15000 Running Watts, attempts to offer the best of both worlds.

To give you an idea of the kind of muscle you get with this Generac generator, it claims to provide enough power to operate a 5-ton air conditioner. With such incredible strength, it can also handle multiple home appliances, all kinds of outdoor and landscaping equipment, and camping devices.

About Generac

Robert Kern founded Generac in 1959 in Wales, Wisconsin. Although the company started with only five employees, it now encompasses a range of other well-known power engine companies worldwide, including Motortech, Selmec, DR Power Equipment, Powermate, and Pramac.

In 1989, Generac became the first company to offer affordable home standby generators. Along with this milestone, they also released the first engine designed for generator use. Today, they own the broadest array of power products of all manufacturers. Their range includes portable, residential, commercial, and industrial generators.

Generac sets itself apart from other companies through its commitment to sustainability. They focus on developing manufacturing procedures that reduce environmental impact. They aim to minimize the number of materials used and emissions produced.

In 2019, Generac celebrated 60 years of success and now looks forward to serving its customers with all of their future power needs. Today, they are the #1 manufacturer of home backup generators.

What We Like Best

  • A 1-¼ inch steel tube cradle provides a sturdy frame for durability
  • Contains defenses to protect and lengthen the lifespan of the engine
  • A convenient electric start function with battery included
  • Easily track fuel consumption with an hour meter that also monitors maintenance needs
  • A large fuel tank that holds up to 16-gallons of gas, giving this generator a runtime of 10 hours at 50% load
  • All outlets have surge protection

One of the most impressive features of the Generac 5734 is the state-of-the-art engine that guarantees a longer engine life than other generators. It has a full-pressure lubrication system with a spin-on oil filter that removes dirt and debris from the engine to keep it running smoothly over time. This system also directs oil to places where it’s most needed.

Mobility is difficult due to the size of this machine, but several features make transportation a little easier. Durable tires work well on all types of terrain if you need to move it around your house or to a job site. Plus, a built-in lifting eye helps if you are using this generator on-the-job for more industrial purposes.

A surprising result of our research was how quiet this generator is for its size. Of course, it’s going to be louder than a smaller machine. But, for a generator as powerful as this one, the low tone muffler resulted in a low noise level that ended up being a bonus benefit in this machine’s favor.

Customers will also appreciate this generator’s automatic idle control that minimizes noise and fuel usage, making it a more efficient machine. We also love that this generator has a seven surge-protected outlets that provide plenty of opportunities to hook up multiple appliances, devices, and tools.

The Generac 5734 generator was named one of our picks for the Best Portable Generators

What We Don't Like

  • Weighs 373 lbs., making it a very heavy option and challenging to transport

In part because of the power this generator provides, it is extremely heavy and awkward to transport. Because of its heft, it is also hard to assemble it. You have to attach the wheels yourself by lifting the machine. You will probably need some help from a family member or friend to set everything up.

Some customers have also had complaints about Generac’s customer service. They report that it is not always prompt and that there can be delays with returns and granting warranties.



From our research into this machine, we found that the Generac 5734 15000 Running Watts is a premium portable generator with ample power to serve several purposes. For home use, it can power up your air conditioner, lighting, refrigerator, entertainment system, and other devices during lengthy power outages.

If you are looking for extra power at a job site, this generator is more than capable of giving you the strength to complete almost any task. The wheels and lifting eye ease some of the transportation challenges you encounter with this generator because of its considerable weight.

A few of this generator’s most useful features are the innovative engine lubrication system and strong steel frame that promise durability and efficiency for years to come. Customers will also love the electric start capability that makes turning this generator on a breeze. For such a large and powerful machine, the noise level is surprisingly and pleasantly quiet.

If you choose to purchase the Generac 5734 15000 Running Watts generator, you can trust that you are getting a multipurpose machine with substantial power. It works wonderfully for domestic or industrial purposes, power outages, or additional muscle on-the-job. A long engine life, plenty of surge-protected outlets, and decent runtime make it a reliable buy.

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