The #1 Name in Home Backup Generators

Generac – Home Backup Generators

Generac created the home backup generator category. Today, our generators are preferred by 8 out of every 10 homeowners who invest in home backup power.

A permanently installed Generac home backup generator protects your home automatically. It runs on natural gas or liquid propane (LP) fuel, and sits outside just like a central air conditioning unit. A home backup generator delivers power directly to your home’s electrical system, backing up your entire home or just the most essential items.

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With automatic operation and 24/7/365 support from our Wisconsin headquarters, a Generac home backup generator gives you the peace of mind in an increasingly uncertain world.

Founded in 1959, Generac was the first to engineer affordable home standby generators, along with the first engine developed specifically for the rigors of generator use, and is now the #1 manufacturer of home backup generators. Generac manufactures the widest range of power products in the marketplace including portable, residential, commercial and industrial generators. We are also the leading designer and manufacturer of manual and fully automatic transfer switches and accessories for backup power applications up to 2 MW.

Our Generac Mobile line of powerful, high-quality light towers, trailer-mounted mobile generators and combination units are designed and built for a variety of industries and the most demanding environments.

Generac also pioneered the residential power washer category, putting the power to clean into the hands of homeowners. Today, Generac features a full line of innovative, industry-leading power washers suitable for virtually any application, including the toughest commercial and industrial environments.

At Generac, we protect the things that power your life by providing quality, affordable power solutions.

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What Our Customers Are Saying

I was called a couple hours before my appointment because he had a cancellation. I was so happy to have my service earlier. He was very nice and knew exactly what was wrong with our oven. He fixed it… Tara H.

Called for an appointment on Sunday, the technician Paul arrived at 10am on Monday (in a 9am-1pm window) and got right to work. He quickly diagnosed the issue and made the repair. He gave us some tips to improve… Jenny H.

A/C went out last night and I have my elderly mother here. I called Colonial and needed someone out A.S.A.P they were so nice and understanding I had a guy out the next morning at 9am. Thank goodness because… Sally-jane S.

Colonial takes care of our entire portfolio of over 100 units, none of which are the same. The entire staff, from scheduling, to technicians, to billing are absolutely top notch! Every technician I have met has gone above and… Kelli J.

From sales to install and followup all of the staff at Colonial were great. I got 6 quotes in all on Lennox system when looking for new furnace, a/c unit and hot water tank and my family selected Colonial… Kathy M.

What To Expect Discover the Difference

Trained Technicians Our team will arrive at your home with the expertise and tools needed to restore your home’s comfort.

Locally Owned & Operated From our leadership to our technicians, everyone on the team is dedicated to helping our community thrive.

Lennox Premier Dealer We're proud to offer Lennox systems that will exceed all your expectations.

Trained Technicians

Our team will arrive at your home with the expertise and tools needed to restore your home’s comfort.

Locally Owned & Operated

From our leadership to our technicians, everyone on the team is dedicated to helping our community thrive.

Lennox Premier Dealer

We're proud to offer Lennox systems that will exceed all your expectations.