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Generac 5734 GP15000E Generator Review

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The affordable 15000 Watt Electric Start Powered Portable Generator

With the Generac Electric Starter, you can start your generator right away. It powers everything from lighting, to heat pumps, to refrigerators, to computers, to microwaves.

In the event of a power outage or when you're disconnected from the grid, this is also a appropriate solution for security systems, electric stoves and computers.

The generator has a hardened steel cradle tube. This ensures long-term durability and robustness. You also get a built-in lifting eye to make transferring the device a little easier. This governor reduces stalling and makes sure the ride is smooth.

I am a big fan of the Generac 5734, a gas-powered portable generator with 15,000 watts. A wide variety of applications can benefit from its versatility.

Anywhere from the construction site to the house, this one is always on hand to power up the gadgets you need it to. We like the fact that it's so compact. Lifting handles and all-terrain pneumatic tyres make transportation a breeze.

15000-Watt Generators: what to consider


Portable generators generally run on gasoline or propane. However, if you live in an area susceptible to natural calamities, gas may be in short supply. Gas, on the other hand, is very easy to store. A solar-powered generator is perfect for little tasks.

Hybrid generators, which can run on both gas and propane, are an option if you frequently need to convert between the two fuels. When choosing a generator, make sure it can run on either gas or propane.

Efficacy of Fuel Use

The fuel tank should be checked before starting the generator to see how long it can last. The vast majority of gas generators are rated for 25 or 50 percent load.

A gas generator, for example, can run for around 10 hours at full load if it can run for 20 hours at half load. Keep this in mind when making your decision on a generator.

Generac 5734 GP15000E 15000 Running Watts/22500 Starting Watts Electric Start Gas Powered Portable Generator

Excellence in the design of products

In order for a generator to be long-lasting and reliable, it must be of high quality. Additionally, the design must be excellent, especially if it is going to be used in a tough area. Then this is especially true. Make sure it has wheels and outlet covers if you're going to utilize it in the workplace.

The bells and whistles are usually unnecessary if you only require backup power for your home because you'll only be using it for powering the home.


The sound of a gas generator can be deafening. Living in the middle of nowhere may not be an issue, but if you're closer to town, noise may be an issue. As a result when buying a 15,000-watt generators make sure the noise levels are acceptable to you.

Generator covers and exhausts can be used to reduce noise, but you should think about where you live and how you plan to use the generator if you do so. Generators of this size can be loud.


You should always look for a generator with a robust warranty when making a purchase. You'll also want to receive good customer assistance if you need to troubleshoot your generator.

If something goes wrong with a generator, it's a good idea to have a warranty in place to cover you.

Most generator warranties last between one and three years, and the length of the warranty will vary based on whether you're using the generator at home or at work.

Only after considering all of the above, should you start looking for a generator, and look for trusted reviews. Do not be tricked by marketing campaigns and promotions.

Why I like Generac Generators

They are powerful

An OHVI engine, used to power the generators, is designed to last for an extended period of time. For the most part, its commercial generating units are powered by this very engine. This generator's engine can run for three to four times as long as the competition's.

There is a wide range of products

In addition, Generac generators offer the widest range of backup options for residential properties. There should be a generator available that matches your needs.

The power outputs of Generac backup home generators range from 6 KW to 50 KW.

There are also renting options for Generac generators, if you don't have the money to buy a standby generator for your home permanently. There are several uses for Generac portable generators beyond emergencies, including tailgating, campfires and RVing. You can utilize them to provide additional electricity for power tools and other equipment if you're working on your house.

Portable generators from Generac are affordably priced in my opinion and offer excellent value for money.  

Impressive dealer network

Not only does Generac offer a wide range of generators, but the company also has a widespread dealer network across the country. There are around 5,000 retail locations across the US.

This means that no matter where you live in the United States, getting a Generac generator delivered to your door should be an easy process. 

Taking care of a Generac generator is a piece of cake

When it comes to maintaining Generac generators, it's fairly straightforward. Generac backup power units run self-diagnostics on a weekly basis. The Quiet Test feature is exclusive to this manufacturer's backup generators. They can utilize this to do a self-test without causing any disruption to their surroundings.

Market leading technology

Generac's G-Flex technology is yet another crucial feature of backup generators manufactured by the company. For instance, this function permits the engine to operate only as swiftly as it is required.

Generac generator engines are distinct from their competitors because their engines run at a constant speed regardless of the amount of energy needed.

With the G-Flex technology, Generac generators consume less fuel and operate more quietly. Generac generators are pretty much entirely risk-free devices.

Galvanneal steel with RhinoCoat preserves and extends the life of the generator in most of these generators.

Low fuel shut-off prevents these generators from being damaged by running out of fuel. In the event of an overload, the circuit breakers on these generators protect your appliances.

They are environmentally friendly (relatively)

Generators made by Generac are kind to the environment. Fuel consumption and emissions are reduced with these generators. They are also less intrusive than those of other companies.

Generac backup generators can be up to 19 decibels quieter than the competition when operating.

Generac generators are the only brand to receive the Good Housekeeping Seal of Approval because of their excellent features.

Generac offers a wide variety of generators to choose from and a wide network of dealers, therefore most homeowners buy a Generac generator whenever a storm or blizzard threatens their area.

Generac 5734 GP15000E Generator Review

Generac 5734 GP15000E 15000 Running Watts/22500 Starting Watts Electric Start Gas Powered Portable Generator

Let's have a deeper look into this awesome generator:

Who is the Generac 5734 designed for?

For the most part, the Generac 5734 GP15000E is a high-quality, lightweight, and versatile standby power source. Ideal for:

  • Construction workers, working in remote places and the Work From Home crowd. 
  • Standby unit for the whole house in case of emergency. 

Notable features

There is a digital data center on the control panel of the GP15000E that displays information about the GP15000E's current state and activities, along with its battery life expectancy.

Using the generator's built-in fuel gauge, you can quickly, easily, and conveniently check the generator's gas level.

Additional safety features include overload protection and an automated low oil shut-off.

The control panel provides the following 8 auxiliary power sockets:

  • Dual 20A 120V outlets (5-20R) GFCI.
  • The 120V 20A Duplex is available (5-20R).
  • Plugs that can be used to power two 120 volt, 30 amp devices
  • To-and-from (L14-30R) At 120/240 volts and 30 amps,
  • 120/240V and 50A receptacle (14-50R).
  • There is also a single 12V 10A DC plug, which makes charging your batteries easier.

A simple RV connection may be made with an L5-30P to TT-30R converter, even though this Generac generator does not come RV ready it is pretty close. 

During a power outage, you can use the supplied twist-lock L14-30R receptacle to connect your home to a breaker box using the GP15000E's built-in transfer switch.

The Generac GP15000E comes with everything you need to get the generator up and running straight away, including a tool kit and funnel.

The EPA has cleared the Generac GP15000E, but CARB has not. It is therefore illegal to buy or sell it in the state of California.

However, because of the spark arrestor, it can still be used in densely forested areas.

How powerful is the Generac 5734 GP15000E?

This generator's heart is the Generac OHVI 4-stroke gasoline engine, which displaces 992 cubic centimeters. Power consumption is 15000W on a 120/240V output, and the peak wattage is 22500W.

It uses a simple and straightforward electric starter to get it up and running.

The GP15000E has a fuel capacity of 16 gallons, which allows it to run for about 10 hours at 50% load with a full tank (fuel consumption around 1.6 GPH).

The GP15000E's THD of 20% makes it unsuitable for powering delicate electrical devices.

How portable is it?

Since it measures L48.5 x W31 x H39.5 inches, this Generac GP15000E generator has a traditional open frame design that makes it stable and easy to lift out of the ground. All weather situations, including the outdoors, are suitable for usage with the effective design.

The generator weighs 363 pounds, so even though it is technically 'portable,' moving it will be tough by yourself. In spite of this, it has a 12.3-inch wheel kit and a handle that allows you to relatively easily move it once it's on the ground.

Additional safety is provided by a raised hook on the top of the frame, which makes it easier to transport, load, and remove a generator.

Summary of the Generac 5734 GP15000E Generator

For long-term dependability, this whole-house generator has an hourly tempo and a low-oil-level stoppage design.

The idle control built into the 15000 generators reduces overall noise and fuel consumption for a more convenient workout. Ten hours of running is possible with a 16-gallon tank of gasoline. 

Generac 5734 GP15000E 15000 Running Watts/22500 Starting Watts Electric Start Gas Powered Portable Generator

The 15kw portable generator has a high-performance engine and a high-profile mechanism. An important factor in the product's popularity is its long shelf life. It is easier to use and more convenient to store the Generac 15kw portable generator than other common models. It's simple to service and requires minimal upkeep.

Your life will be free of worry thanks to the Generac 15kw generator's safe and thorough running. In addition to having outlets and features that are secure, this 15kw generator also offers some distinctive characteristics. Powerful full compression lubrication is included in the generator's design.

What other options do you have?

The Generac GP15000E weighs around 363 lbs when completely dry, making it among the more lightweight models in the 14000-20000 watt power range. In terms of weight, the Lifan LF15000-EPL is one of this power range's champions.

The GP15000E can run for about 10 hours on a full tank and 50% load, which is within the normal range for similar-powered generators. One of the longest-running devices with a similar power output is again the Lifan LF15000-EPL, with a runtime of approximately 12 hours.

The run time is important, but it is only meaningful if we also take into account the amount of fuel in the tank, thus it doesn't tell us anything on its own. Generators of this type typically consume 1.6 GPH (gallon per hour) or less while running at 50% capacity.

The Lifan LF15000-EPL, with a gas consumption of only 1.17 GPH, could be the generator for you if you want to increase your fuel efficiency even further.

Why you should choose the Generac 5734 GP15000E

  • Its small size and pneumatic wheels make it fairly simple to transport.
  • An electric start eliminates the tangle of cords.
  • You can run a sump pump with it to keep the basement dry.
  • Power equipment, music, and outside illumination is easily handled.

Final thoughts

To sum up, the 15kw portable generator has all of the necessary specifications and incorporates a number of useful features. The 15kw generator is built to last thanks to its good design and quality materials. Owning this generator will give you peace of mind in many circumstances.

If you want a quiet and functional machine, you should get this product. This generator has enough wattage to power all of your home's electrical appliances. As a result, it's a great investment.

About Tom Bell

Hey, I’m Tom, the owner of Generator Reviews! I built this website to help you get the very most out of your generator and select the correct one for your personal circumstances. This site contains reviews of virtually every generator, detailed buying guides, as well as maintenance advice to help you keep yours in tip-top shape!


Generator.Reviews is an independent review business. I am not affiliated with any manufacturers and do not accept paid reviews. When you buy through my links, I may earn a commission which helps me to maintain this website and keep the reviews coming your way!

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