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Generac 20,000 Watt Liquid Propane/Natural Gas Standby Generator Review


Generator: Generac 20,000 Watt Standby Generator
Manufacturer: Generac

Generac 6244 20,000 watt Standby Generator‚Äč


  • Reliable.
  • Manufactured by a well-known brand.
  • Can power the entire house.
  • Automatically switches on when needed.
  • Tests itself every week to make sure everything works.
  • Quieter than most portable generators I’ve heard.


  • Price and Installation costs if you get it installed professionally.
  • Noise (but that goes for all generators).
Research LinksGenerac 6244 20000 Watt Standby Generator
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Reliability – 10/10

I’ve owned this gen for just over a year now and fortunately during that time, we have only experienced a few short power cuts (each time the generator kicked in and worked flawlessly).

Maintenance – 9.5/10

Every week the generator boots up for 10 minutes or so to make sure everything is still working ok. Everything runs as expected and I have no complaints there. Changing the oil is easy enough and it doesn't take up much time, it doesn't have to be changed that often either.

Noise – 9/10

The noise produced is fairly loud, it’s not really noticeable while I’m indoors, but it can be fairly loud in close proximity. No generator is truly “quiet” though, and I don’t own a number of standby generators in order to draw an accurate comparison. Nevertheless, I would say this generator is quieter than most portable generators I’ve heard.

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Overall, I’ve found the Generac to be extremely reliable, built to a high standard/quality and I take great comfort in the knowledge that it will power my home, regardless of whether or not I’m actually there. I highly recommend it to anybody looking to buy a standby generator in this wattage range.

Don't like this generator? See alternatives here.

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