The Standby Generator That Can Take Your Home Off the Grid (If you want)

Generac 5875 Guardian Series Standby GeneratorProduct name: Generac Guardian Series 5875 20kW Natural Gas Standby Generator

Brand: Generac

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This generator is a comprehensive solution for home back up power supply. The Generac Guardian 5875 features auto start up which is really convenient if there is a power cut. This generator also packs 20kW, which is enough to power your whole home without the need to worry about cut outs. Or rationing your power.

The Guardian 5875 has received a great amount of positive feedback. The generator scored 4.3 out of 5 from 35 reviewers and 29 users gave it 5 out of 5. Some reviewers also mentioned that their local electricians recommended this unit. But this generator isn’t cheap and some people reported some problems with the generator. So I suggest you read about the features, benefits and hear some real-life user feedback (including complaints) to ensure you make the right choice before buying this generator.


  • No Need to Re-fuel

This Generac generator is designed solely for back up power supply. That’s why this generator has to be plumbed in to your natural gas line. The unit includes the piping, but should probably be installed by a professional. At the end of the day the times when you need this generator, you’ll be happy you got it properly installed. And it has the added of bonus of endless fuel during a disaster because natural gas lines are underground. So you don’t have to go out of your comfortable home and refuel in bad weather.

  • Auto Start

Guardian 5875 has an auto start feature. This means when there is a power cut the generator will automatically start within seconds. The generator comes with a 200 Amp transfer switch to facilitate this. It is installed in your distribution board and senses when the utility supply cuts out. It will then switch on your standby generator within seconds. You probably won’t even know the power was out.

  • Quiet Test Mode and Easy Maintenance

How annoying is it when you need something, and it fails in an emergency? Well Generac thought about this and included a convenient feature that will test the generator weekly. You can set the time to your convenience and the generator automatically does test runs. Talking about noise, the generator is as loud as an idle car during the test. The Guardian 5875 is also built for low maintenance so that you only need to perform maintenance once every two years or after 200 hours of use.

  • Protection From Bad Weather 

The Guardian 5875 is built to withstand all types of weather. It will not corrode. Generac have coated the enclosure with their own technology that binds the paint to the generators body so that there is no chance of corrosion.

  • Clean Output

You might be wondering, if this generator is powering your whole house, what’s the quality of the electricity it produces? Well you can rest assured that the generator produces clean electricity that can power sensitive appliances like laptops. Generac’s True Power technology also protects from voltage surges so that there’s a constant and clean power output.

  • At-a-Glance Status Display

The generator comes with an informative display that enables you to quickly monitor the generator and manage the performance. The display is a dual line and can be used in three different languages. The display is also placed on the externally so that you don’t have to open up the generator enclosure. There is also a separate ‘hour meter’ that shows the run time so its easy to determine when to perform maintenance.

  • External GFCI Outlet

This feature is a really well thought out by Generac, the external GFCI outlet can be used for quick access to electrical power so you don’t need a long extension cord. The GFCI outlet is designed to protect from electrical shocks like when you are mowing your lawn and step mistakenly on exposed wire.

User Feedback

I sourced these real user comments from Amazon. These people did not send me these reviews in any way. For the sake of transparency I just wanted you to know that. You can view all the reviews for this generator on Amazon at the link just below. I just thought I could save you some time by placing some snippets here.

Review 1 (positive 5 out of 5)

“So happy with this generator, it is an awesome feeling to know when the power goes out this baby runs my whole house! Worth every dollar, what a great peace of mind. If you are thinking about buying this…”

Actual user comment from “Forevershoppin” at this generator’s reviews section on Amazon.

Review 2 (positive 5 out of 5)

“This Generac 20K unit is strong enough to run a hot water tank, stove, and electric central heating unit for my 1560 sq. ft. home. We haven’t had a power failure since it was installed, but it runs weekly for a few minutes as designed . I manually tripped the transfer switch to test it twice and it kicked on in a few seconds, sending power to the house with no problems. The auto-transfer switch is a good choice. Comforting to know we won’t be without power when our electricity goes out.

Well worth the investment. I hired a local contractor who specializes in installing standby generators. I highly recommend using a professional. It will save you a lot of headaches.”

Actual user comment from “Biskit73” at this generator’s reviews section on Amazon.

Review 3 (negative 1 out of 5)

“We have had our Generac generator for 3 months and so far we have gone through two batteries and a new control panel. Now the yellow light is on again indicating that the battery level is low. We had to wait for the battery then we had to wait for the control panel. Can’t wait to hear what is wrong with it now and how long we will have to wait for parts and install. By the way, we live in Florida and we are right at the peak of hurricane season. Thank God Isaac missed us because we would have been without back-up power after spending over $12,000…”

Actual user comment from “Jana Murphy” at this generator’s reviews section on Amazon.

See all the reviews for this standby generator here…


To wrap up this review I think that this generator is going to be ideal for people who encounter black outs quite frequently. The generator has features that are specifically thought out to make power cuts less frustrating. Current users have also recommended this generator; however, please read the reviews before buying the generator as it is an expensive unit.

Nevertheless if you’re convinced already, look at the shipping details from the link below because quite often you can get FREE Super Save Shipping for 5 – 8 day delivery to your front door.

See full details here…