CONTROL YOUR POWER.
PROTECT YOUR BUSINESS.

A permanently installed Generac commercial standby generator protects your business automatically. It runs on natural gas or liquid propane (LP) fuel and is installed outside your facility, similar to an HVAC unit. A commercial standby generator delivers power directly to your building’s electrical system, supporting your entire operation or just critical systems such as security, refrigeration, lighting, and essential equipment. Now equipped with FREE Mobile Link™, you can monitor the status of your generator remotely from a phone, tablet, or computer — ensuring you're always connected to your business’s power, no matter where you are.

 
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LIQUID COOLED INSTALL
COMMERCIAL & BUSINESS GENERATORS

THE #1 SELLING BRAND OF BACKUP GENERATORS

Generac pioneered the commercial standby generator category. Today, our generators are trusted by more businesses than any other brand for reliable backup power.

You’ll never have to rely on temporary solutions or unsafe workarounds again. Your Generac commercial standby generator delivers power safely and automatically to your facility’s electrical panel, keeping critical operations running without interruption.

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RESIDENTIAL HOME GENERATORS

HOW HOME BACKUP POWER WORKS

A Generac automatic commercial standby generator is a permanently installed backup power solution designed to protect your business during power outages. Unlike portable generators, it’s connected directly to your facility’s electrical system and powered by your existing natural gas or liquid propane supply—eliminating the need for manual refueling or temporary extension cords.

Here’s how it works: The generator is paired with an automatic transfer switch that constantly monitors your utility power. When an outage occurs, the transfer switch immediately signals the generator to start. Within seconds, the generator powers on and begins supplying electricity directly to your building’s electrical panel. Once utility power is restored, the system automatically shuts down the generator and seamlessly reconnects your facility to the grid.

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RESIDENTIAL HOME GENERATORS

WHAT DO I NEED TO KNOW?

We know a home backup generator is a big investment. Here's what you need to know to make an informed decision about your Generac home backup generator purchase.

How Do I Choose the Right Generator for Me?

Generac has an online sizing calculator that can help you determine the right home backup generator for your unique needs. The best way, though, is to set up free, in-home assessment with us and we can help you out.

How Much is Everything Going to Cost?

Generac home backup generators are the most cost-effective on the market. Installation costs vary by system size, installation considerations, and local building codes. 

What's Involved in Installing a Home Backup Generator?

Installing a home backup generator is an exciting time. Your installer will prepare the installation site outside your home, place the generator, run the natural gas or LP fuel line , install the transfer switch, and make all of the necessary electrical connections. And they will make sure that your backup generator runs properly, and is ready for its first power outage.

How Do I Get Started?

You can begin exploring the full selection of Generac home backup generators.Use our interactive sizing guide to narrow down the selection. Then get started with us with a free in home consultation.

HOW DOES A GENERATOR HELP?

TESTIMONIAL - PEACE OF MIND

OUTAGE WHILE ON VACATION