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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 11-20 of 74 reviews
Jul 4, 2026
Reviewer name: NMOD13
5 out of 5 stars
5 out of 5 stars review

Hurricane Prepared

4 years after Hurricane Ian it was time to replace a portable 5kw generator with a whole home generator. We will now be able to have the entire house on standby power should another major outage occur. Being familiar with the Generac company based in Wisconsin, this was the only generator considered.

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

Don't buy this unreliable generator

I bought this NextGen 28kW to replace a rusty but reliable 20 year old 35 kW Generac. Our NextGen failed immediately at our first power outage 3 weeks after installation and is still nonfunctional after 3 service trips and more than 4 hours labor over the last week.

Review from generac.com
Helpful?2MFUGGDGXJBG19966162421
Aug 15, 2026
Reviewer name: Bigbirddy
5 out of 5 stars
5 out of 5 stars review

You won't be disappointed!

I have been wanting to purchase a whole home generator for some time. Finally bit the bullet an got a 26KW with transfer switch about a month ago. 2 days ago, 08/13/26, the power died for about 4hours. Unit kicked in flawlessly and handled central AC, stove and package AC unit with ease. I like the fact that natural gas is always ready to go when problems arise. Install was truly professional and exactly as promised. I'm a satisfied customer!

Review from generac.com
Helpful?2MFUGGDGXJBG19966162421
Aug 26, 2026
Reviewer name: Traci3195
5 out of 5 stars
5 out of 5 stars review

Best Buy Ever!

Best buy we have ever made. A month and a half after it was installed, we had a big windstorm in Montana (in December). Power was out for 3 days, but our Generac generator started right up and kept running for 3 days, with NO problems at all. Kept us warm, kept the lights on, kept the hot tub hot. We could cook and go on with our daily lives with no hitch. It's a Godsend!

Review from generac.com
Helpful?2MFUGGDGXJBG19966162421
Aug 14, 2026
Reviewer name: Tim1958
5 out of 5 stars
5 out of 5 stars review

The app is very good and verifies its working

Had this 6 weeks now, just before storm season. Good quality product but difference is the installation by a company that only does generators, not some diversified franchise or one-at-at-a-time electrician. Family run business that concentrates on Generac and installs 5- 7 per week. The price was $2800 less than other vendors and they gave me the confidence of a quality installation and maintenance program.

Review from generac.com
Helpful?2MFUGGDGXJBG19966162421
Jul 4, 2026
Reviewer name: Satisfied Customers
5 out of 5 stars
5 out of 5 stars review

Generator Upgrade

This is our second Generac generator because, after 19 years with our first one, we wanted to upgrade to one with more current features/functions. Our first one was purchased in Sept. 2007. It gave us optimal, quality, and dependable service. It is still working today, in another household, with a family whom we gave it to. We look forward to and are confident that we will have the same level of quality service with our recent new upgraded generator!

Review from generac.com
Helpful?2MFUGGDGXJBG19966162421
Jul 30, 2026
Reviewer name: TexArdvark
5 out of 5 stars
5 out of 5 stars review

Reliable Protection

Purchasing this generator was similar to putting up a magical ward against power failures. Where the original motivation was a frequent number of outages, we’ve not had any single outage since installation. In it’s standby configuration it’s met our expectations.

Review from generac.com
Helpful?2MFUGGDGXJBG19966162421
Sep 16, 2026
Reviewer name: disappointed installed
1 out of 5 stars
1 out of 5 stars review

Dead on arrival

1st unit would not work, and Generac would not stand behind the unit or repair it. The supplier had to replace at cost, and I had to eat the cost or try to repair the 1st one and the installation of the new one.

Review from generac.com
Helpful?2MFUGGDGXJBG19966162421
Sep 11, 2026
Reviewer name: Dave 1956
5 out of 5 stars
5 out of 5 stars review

Insurance policy for the future

I purchased this generator in July and the installation was completed in August. The installation was very professional. I would recommend One Way Electric in Phoenix for the installation.

Review from generac.com
Helpful?2MFUGGDGXJBG19966162421
Sep 29, 2026
Reviewer name: Joe G
5 out of 5 stars
5 out of 5 stars review

Piece of mind

Purchased the generator two years ago and have no issues. Haven’t had to use it often but it is a great comfort knowing that we are protected considering the storms that pop up increasingly

Review from generac.com
Helpful?2MFUGGDGXJBG19966162421