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Generac Generator Reviews: How To Find The Best Generac Generator For Your Needs


Purchasing a generator should not be done out of impulse even if you can easily afford it. Generators serve a very important role in providing power to your home and it is essential that you understand everything there is to know about it prior to purchasing one.

To make sure that you are getting the right generator for your needs, you need to find reliable reviews that would tell you if the generator is a good buy or not. In this article, we’ll be discussing one of the most popular brand of generators today – the Generac generator.

Generac has become widely known in the field of generators because they provide reliable as well as durable lines of generators. They offer a number of models with different capacities for any kind of power generation needs.

To help you find the ideal Generac generator that suits your needs, we’ll share with you the top 5 Generac generator reviews and will give you the considerations to make when it comes to purchasing one.


Product Name




Generac 6439 Generator

97 /


Generac 5802

92 /


Generac 6001

90 /


Generac 6237

85 /


Generac 6438

80 /

**Below, you'll find our more detailed reviews, but you can also click the links above to see current prices or read customer reviews on Amazon.

Things To Consider When Buying A Generac Generator

Purchasing a Generac generator is an excellent decision to make if you want a reliable source of power in case of power outages or power shortages. In order to find the ideal Generac generator that perfectly matches your needs, be sure to bear in mind these important considerations.

1. Power Of The Engine

a generator outside

When it comes to generators, the most important thing to consider is the power of the engine. While all Generac generators are proven reliable in terms of engine power because they make use of OHVI engines that are designed mainly for extended use, you need to choose one that is enough for your specific power requirements.

Say if you’re looking to provide power to a whole building or house then it would be best to go for the generator with bigger power output. Of course, as you increase the power requirement out of your generator, you should also be ready to shell out more for the price.

2. Maintenance And Service Providers

a generac generator

You should always consider maintenance and repairs when buying machines or equipment such as generators. It is important to have a reliable service or repair dealers nearby since you may not be equipped with all the knowledge and skills in solving issues with the product.

Not only will this relieve you of the many hours of trying to fix the issue out of your generator but will also help you save more on purchases on parts.

3. Maintenance


Maintenance and upkeep will always be required in equipment and machines that have engines. With the generator having to use engines and other components, it will require regular maintenance and upkeep.

Most modern generators today are equipped with easy-maintenance features that relieve you of constant air changing of the engine and regular cleaning of the air filter. While taking advantage of these maintenance features, note that these features can be quite expensive.

4. G-Flex Technology

a generator on the field

One thing to consider when looking for an authentic Generac generator is its patented G-Flex technology. This technology allows faster and more efficient engine running out of your Generac generator. This also allows you to adjust the speed depending on your electric load demand.

Also, with this patented technology, the engine runs much quieter compared to other conventional generators. Lastly, this system is also equipped with an auto-shut off function which steers the engine clear of damages brought about by low fuel during operation.

5. Save To The Environment

a generator

One thing that people do not like about generators is that they emit smoke which can be dangerous to the environment. Fortunately, for Generac generators, they are designed with fuel efficiency in mind and thus they emit lesser amounts of smoke during operation.

Additionally, the gensets of Generac generators are much less intrusive as compared with other brands of generators. If you’re looking to use the generator close to your home, make sure it provides fewer emissions.

6. Noise Levels

house generator

Generators are also known to produce a loud noise during operation. This can be quite a hassle, especially when using the generator at night when everyone else is sleeping.

Generac generators come with an array of units that operate with different decibel levels. Compared to other generators, these generators provide decibel levels that are as low as 19-40 dB on operation.

Reviews On The Top 5 Generac Generators

When it comes to generators, Generac generators are indeed an optimum choice. Having to choose one, however, can be quite a challenge because of the many selections in the market. To give you a better view of your ideal Generac generator, we’ll supply you with the top 5 choices today.

These Generac generators are as follows.

1. Generac 6439 Generator


If you want more power out of your Generac generator, you can also opt for the Generac 6439 Generator from its Guardian Series.

This product generates 11 kW of power which is perfect for supplying electricity for the whole house or small building. With this much power, you can actually provide backup power to heavy-duty equipment such as 3-ton air conditioners, water pumps, whole-house lighting and many others.

It is also designed with patented True Power technology which ensures that your engine burns fuel with high efficiency and low emissions. With this feature, the generator produces 5% less total harmonic distortion which simply means clean and smooth operation.

Also, this feature allows safe power supply for sensitive devices such as cell phones, laptops, and computers.

It is also easy to install with its pre-wired transfer switch along with other engineered components that allows convenient installation and mounting without the need for additional tools other than a screw or a wrench.

Durability is also a main feature of this product because it is made with a powder-coat finish and Galvanneal steel chassis to ensure durability and resistance to corrosion even under harsh conditions.


  • Can be powered by either natural gas or propane
  • True power technology for clean and smooth operation
  • With auto-transfer switch
  • Large output capacity
  • CARB Compliant


  • Replacement parts are not readily available in local hardware stores
  • Expensive

2. Generac 5802


Last but not least is the amazing Generac 5802 when it comes to reliability and efficiency.

This generator is also a crowd favorite because of its 530cc OHVI gas-powered engine which produces 10,000 watts output. This much-generated power is ideal for providing temporary electricity for the whole house for long hours.

It is also proven in terms of durability because it comes fully wrapped and with 1.25-inch steel tube cradle to provide protection against external elements. In addition, it comes with an exclusive powerbar which allows for power wattage monitoring.

Operating this generator is also easy because of its single-touch electric start feature and it doesn’t require much maintenance.

This product is also CARB compliant which ensures lesser emissions during operation. It comes with a huge-capacity fuel tank for lesser refills and with fuel gauge to allow for better fuel level monitoring.


  • CARB compliant
  • With easy start feature
  • With auto-oil shutdown system
  • Much lighter than others with only 300 lbs for its total weight


  • Warranty is not very clear
  • Battery doesn’t charge continuously

3. Generac 6001


The Generac 6001 can also be an excellent choice if you want a reliable source of temporary power during power outages or whenever looking to provide power for outdoor activities such as camping or boating.

This portable generator is a popular choice because it provides a good supply of power ranging from 5500 watts to 6875 watts output.

It is designed with a 50-state control panel which comes with a 120/240V 30amp twist lock outlet, a pair of 12V 20amp duplex outlets, a pair of 20amp circuit breakers and a 25amp circuit breaker.

This product is also designed with an hour meter along with outlet cover which provides an added protection against external elements and also for safety. It comes with a robust 389 cc OHV engine with low oil shutdown system which reduces chances of engine damage and ensures years of use without much maintenance.

In addition, this product also comes with a Power Dial which provides various engine functions within a single control panel. It can also be connected easily to fuel lines at home for automatic fuel intake.


  • With propane tank holder
  • Low oil shutdown system to prevent engine damage
  • Easy to install
  • Can be connected to manual transfer switch
  • With outlet covers


  • Can be hard to start
  • Not recommended for sensitive devices and gadgets

4. Generac 6237


One leading choice when it comes to Generac generators is the Generac 6237 because it is designed with a durable steel enclosure that guarantees long years of regular use.

This product has lesser chances of overheating because it also comes with an air-cooled engine. Also, it is designed with a 10-circuit transfer switch designed for quick response and protection during power outages.

This generator is a popular choice for home use because of its automatic start-up and fast response during power loss. With this option, there is no need to pull a cord, push a button or flip a switch in order to get the generator up and running.

In addition, many users prefer to this generator over others because it is easy to maintain and requires only a one-time maintenance in every 2 years, which means once in every 200 hours of use. Also, it is CARB compliant so it is proven safe to use even in close proximity with homes.

It is also easy to move around with 360 pounds for its total weight and is available with 5 years of warranty.


  • Dual-Fuel type of generator which can run on natural gas and propane
  • Fuel efficient with its True Power Technology
  • Carb Compliant
  • With good years of warranty


  • Heavy
  • Expensive
  • No extension cords

5. Generac 6438


Another Generac generator to watch out when looking for a generator with a proven track record is the Generac 6438. Just like the previous model, the Generac 6438 is also designed with an air-cooled engine that can be powered by both natural gas and propane.

It features a 200amp Smart Transfer Switch that is designed to automatically start the generator whenever power is lost.

Recently, this generator has also been a favorite choice because of its easy to install features. On delivery, it is already pre-wired and is also delivered with everything that is required to connect the generator to the electrical system of the home. Also, it is ready to be connected to the fuel lines at home.

Once the fuel lines are installed, there will no longer be any tasks required when operating the generator. It auto-starts, auto-refuels, and will not require maintenance even for a year.

With its 530 cc OHVI engine, it is guaranteed to supply more than enough power to the whole house.


  • Can run on both natural gas and propane
  • With high-performing engine
  • Durable and fuel efficient
  • CARB compliant
  • With 2 years of warranty


  • Bulky
  • Heavy

Our Final Verdict

A Generac generator is indeed a good choice when looking for a trusted, proven durable and efficient generator. While all these options mentioned in this list are guaranteed to provide you with all your requirements, we would recommend the Generac 6439 Generator for these reasons:

  • It generates as much as 11 KW which can provide enough power for the whole house
  • Can be powered by either natural gas or propane
  • True power technology for clean and smooth operation
  • Proven to be durable with its Galvanneal steel chassis

So what do you think of our list of top 5 Generac generators? Do you have better suggestions, questions or comments about this list? If you do, don’t hesitate to reach us through our comment box below. We’d be delighted to hear your thoughts about it.

About the Author Emily Taylor

My name is Emily Taylor, gardening is my passion and I’m looking forward to sharing it with everyone. I know that there are millions of people out there want their backyard and garden be attractive just like their front yard, so I am here to help you create your own backyard paradise.

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