How Much Does a Complete Generac Generator Installation Cost?

If you're considering a home standby generator, you're probably wondering what to expect in terms of cost. At McCay Southern Generators, we specialize in turnkey installations of Generac home standby generators, and we want to help you understand what goes into the process—and what you’re paying for.

Average Cost in East Tennessee

The cost of a complete Generac installation can vary depending on several factors, including the size of the generator and the specifics of your home. In East Tennessee, customers can generally expect a total installation cost to range between $13,500 and $17,000, with the average installation falling around $14,500.

To make your investment more manageable, we offer financing through Synchrony Financial, with monthly payments starting around $165/month, depending on credit approval and final installation cost.



What’s Included in a Complete Installation?

At McCay Southern, a "complete installation" means we take care of everything needed to ensure your generator is fully operational and ready to power your home during an outage. Here's what's included:

• Generator placement on a concrete pad or aluminum stand

• Electrical connection to the Automatic Transfer Switch (ATS)

• Fuel line connection to your existing propane or natural gas supply

• 4G remote monitoring device for 24/7 system status updates

• Installation of Smart Management Modules (SMMs) on designated appliances

• Electrical inspection to ensure everything meets code

• Full power outage simulation test to confirm system readiness

Materials & Coordination Involved

Installing a generator is more than just placing a unit in your yard. Here are the key materials and steps involved:

Required Materials:

• Generac generator

• Automatic Transfer Switch

• Generator battery

• 4G monitoring module

• Generator base (concrete pad or stand)

Required Coordination:

• Scheduling electrical disconnects with your local utility

• Coordinating with your gas company (if using natural gas) to assess or upgrade the gas meter

• Pulling all necessary permits

• Filing warranty paperwork with Generac

We handle all of these steps on your behalf, ensuring a seamless and hassle-free installation process. Not all Generac dealers provide this level of service—but we do.

What Can Affect the Cost?

The total cost of your installation may vary based on several site-specific and system-related factors, such as:

• Size of the generator required for your home’s energy needs

• Location and accessibility of the installation site

• Distance from the generator to the fuel source and utility meter

• Number of Smart Management Modules needed

• Type of fuel used (natural gas vs. propane)

We're Here to Help

A whole-home standby generator is a major investment—but one that brings peace of mind and long-term value. At McCay Southern Generators, we're committed to guiding you through the process from start to finish with honesty, professionalism, and care.

If you'd like a personalized estimate or have questions about the installation process, please don’t hesitate to call or email us at (423) 455-5336 or office@mccaysouthern.com. We’re here to help ensure your home stays powered, no matter what.