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Top-Rated Generator install pros in Greenbrier - Updated Nov 2026

Avatar for Top Notch Electrical Group llc
Top Notch Electrical Group llc
5.0(
6
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Greenbrier, TN and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

"Very good price to put switch to run generator installed an electrical switch (not a lockout) to convert to generator power during power outage. Tech stayed on communication throughout. He was on time and got the job done in one visit. He brought a better cover the next day than the one furnished with the receptive. I highly recommend his work."
New panel upgrade
18 neighbors recently requested a quote
Avatar for M & M Electric & Mechanical LLC
M & M Electric & Mechanical LLC
4.1(
13
)
Fixed Generator - InstallGenerator - Install - For Business

Serving Greenbrier, TN and surrounding areas

Approved

In business since 2017

Free estimates

Emergency services offered

"It would be very difficult, if not impossible to find another company that has the commitment to excellence that M&M Electric has. I had them put in new central heating and air in my house and was surprised at how quickly they installed everything while still maintaining a high quality standard and while paying attention to every detail. Very impressive considering what they charged for the install was way less than what I was expecting to pay. I will definitely keep their number handy for any other jobs that pop up."
Gas Lanterns
Wine Room Chiller
Townhomes
Brewery Steam Removal
Rooftop Install

+2

Response time9 hrs
Response rate98%
Recommended by75%of homeowners
Avatar for Premier Generators
Premier Generators
New to Angi
Fixed Generator - RepairGenerator - Repair - For Business

Serving Greenbrier, TN and surrounding areas

Approved

In business since 1994

Free estimates

Emergency services offered

Premier Generators has helped homeowners and businesses across the Southeast protect what matters with reliable Generac home standby generators for over 30 years.\n\nWhen power goes out, your generator is designed to start automatically and restore power within seconds, helping keep your home or business running smoothly. We start by learning what matters most on your property, then guide you through a clear process: right-sized recommendations, permitting, installation, and complete start-up and testing.\n\nOur relationship does not end at installation. We provide service and maintenance to help your system stay ready, including routine inspections, preventive maintenance, and repairs. Ask about maintenance plans and support options, plus warranty coverage that can extend up to 10 years.\n\nWhether you’re protecting a whole home or a commercial site, we’ll help you choose the right solution for your needs and leave you feeling confident, informed, and prepared long before the next outage.

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Generator Install FAQs, answered by experts

Generators are usually sized by running watts and starting watts. Ideally, you’ll want a generator that can offer both the necessary running watts and starting watts for everything you need to power without going beyond 90% of its capacity. Calculate your home’s electrical load based on the breakers in your home or adding up the appliance and lighting needs of connected rooms.

In most municipalities, you will need a permit to install a permanent home generator, including emergency backup, partial-home, and whole-home generators. A permit for a generator usually costs between $50 and $250, depending on where you live. Your electrician or certified generator installer will usually pull the permit for you—and might be required to do so by your building department—but you’ll be on the hook for the cost of the permit. You should ask your installer before agreeing to any work if they will pull the necessary permits for your project.

The cost to install a whole-house generator averages $5,200, with a typical price range of $1,500 to $8,900. However, total costs can vary from $400 for a small portable unit to over $18,000 for a large-capacity system. The most significant cost factor is the generator's size and capacity, but other variables include the brand, fuel type, and labor for assembly and installation.

Generator costs can be broken down by type:

  • Portable or Emergency Backup Generators (1kW–7.5kW): $500 to $2,000

  • Partial-Home Generators (9kW–20kW): $2,000 to $6,500

  • Whole-House Generators (22kW–48kW): $5,000 to $18,000

To avoid paying for more power than you need, consider hiring an electrician to calculate the electrical load for your essential appliances. It is also recommended to get at least three quotes to find the best deal for your specific needs and budget.

Whole-house generators can run continuously for extended periods, even for weeks at a time (around 400 to 500 hours), as long as they have a sufficient fuel supply. However, this type of extensive use will increase wear and tear and can shorten the generator's overall lifespan. During long periods of operation, it's important to check and refill the engine oil as needed, potentially as frequently as daily depending on the model. If your generator uses a fuel tank, ensure it is kept full to prevent unexpected shutdowns.

Costs range from $500 to $2,500, depending on generator type and installation complexity.

The Greenbrier, TN homeowners’ guide to generator installs

From average costs to expert advice, get all the answers you need to get your job done.