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Customer reviews for Generac 18kW Home Standby Generator with 200 Amp Transfer Switch for
Generac 18kW Home Standby Generator with 200 Amp Transfer Switch
4.4 out of 5 stars
stars
74 ratings74 reviews
  1. 5 stars78% (58)
  2. 4 stars5% (4)
  3. 3 stars3% (2)
  4. 2 stars0% (0)
  5. 1 star14% (10)
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Showing 1-10 of 74 reviews
Oct 7, 2026
Reviewer name: CC24
5 out of 5 stars
5 out of 5 stars review

No power, no problem

Purchased the Generac 26K with transfer switch in September 2026 and system is easy to operate and maintain. System is monitored by my service provider and system advises them if there is a problem with system. My Generac runs our house completely if power goes out. We opted for a in ground LP tank which is super nice and keeps yard looking good.

Review from generac.com
Helpful?2MFUGGDGXJBG19966162421
Sep 5, 2026
Reviewer name: tommy53
5 out of 5 stars
5 out of 5 stars review

DIY'rs?...skip the inconvenience, don't wait!

Replaced name-brand, ng, 15kw mobile (shed/outside/stationary) machine w 26kw Generac. Unit was fine; not enough juice to carry both ac units @ same time. Generac resolved all issues: no going outside to start, easily carries full house load, can be run during storm, no periodic inspections during extended run times. Should've done this in the first place! Great machine w perfect financing (18 mo/no interest)!

Review from generac.com
Helpful?2MFUGGDGXJBG19966162421
Sep 28, 2026
Reviewer name: Dick 48
5 out of 5 stars
5 out of 5 stars review

No brainer!

I bought this product for the peace of mind it provides. It supplies my house and all out buildings and as i am almost 100% electric and on a well for water I felt I needed this kind of protection to be self reliant as opposed to needing help in an emergency situation whatever that situation.

Review from generac.com
Helpful?2MFUGGDGXJBG19966162421
Sep 24, 2026
Reviewer name: Bo86
5 out of 5 stars
5 out of 5 stars review

Priceless

I bought this about five weeks ago and have been so happy with it because we’ve talked about it for years. Within those five weeks I’ve lost power twice one was very short. The second time was a little over four hours and that was an important day for us to have power and my Generac worked perfectly.

Review from generac.com
Helpful?2MFUGGDGXJBG19966162421
Oct 16, 2026
Reviewer name: dwards
5 out of 5 stars
5 out of 5 stars review

Living up to it’s reputation

Bought 24K and transfer switch one year ago and had it installed by Generac vendor and haven’t hard to use it yet. Everything about works as it should as it test runs every two weeks as it should.

Review from generac.com
Helpful?2MFUGGDGXJBG19966162421
Oct 6, 2026
Reviewer name: Mark Z
5 out of 5 stars
5 out of 5 stars review

Happy with purchase

I bought this about a month ago and it work as described. It's a gest peace of mind just knowing the house is protected. Exercises every week as scheduled which is important. Also easy to monitor the unit thru the Mobile link

Review from generac.com
Helpful?2MFUGGDGXJBG19966162421
Aug 10, 2026
Reviewer name: Mtlsphere
5 out of 5 stars
5 out of 5 stars review

Peace of Mind

I purchased this one year ago. It is whole-home capable, completely automatic and easy to monitor with the phone app and the Ecobee thermostat. The generator responds to power loss in seconds. It is very reassuring to know that if our home loses grid power while we are away the app will notify us.

Review from generac.com
Helpful?2MFUGGDGXJBG19966162421
Aug 25, 2026
Reviewer name: TJ97
5 out of 5 stars
5 out of 5 stars review

Fast Power Transfer

I finished installing generator a mouth ago. Pretty straightforward installation. I had my first outage during a storm last week. Generator started and transferred power within seconds. Very happy with quality and performance of my new generator system.

Review from generac.com
Helpful?2MFUGGDGXJBG19966162421
Oct 24, 2026
Reviewer name: MailmanRob81
4 out of 5 stars
4 out of 5 stars review

Great idea, poor execution.

Upon installing, I generator, it would NOT run more than 5 seconds. It came from the factory with a defective control board, the "brains" of the device. Where is quality control? I found that the device vibrates A LOT during operation. Have you considered using a vibration damp system to reduce the whole unit from shaking itself to death?

Review from generac.com
Helpful?2MFUGGDGXJBG19966162421
Oct 21, 2026
Reviewer name: Generator failure
1 out of 5 stars
1 out of 5 stars review

Failure to Generac

Failed to start after instillation during first power outage with zero support from dealer or Generac. Very low expectations, just start when the power goes out. Those were not met. How else would I rate it?

Review from generac.com
Helpful?2MFUGGDGXJBG19966162421