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

Avatar for Top Notch Electrical Group llc
Top Notch Electrical Group llc
5.0(
7
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Franklin, TN and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

"Hired him to install a tandem 20 amp breaker and a 20 amp outlet in my garage. He showed up on time with all necessary tools and equipment, the job was completed in a timely manner and his price was the best I had quoted. He was very polite and professional and did an outstanding job on the install,by far the best electrician I have hired so far. I would highly recommend him to anyone needing some electrical work done for a fair price Top Notch is your choice. I will be using them in the future for all my electrical needs."
New panel upgrade
17 neighbors recently requested a quote
Invictus Electric Service Company, LLC
5.0(
5
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+3 more

Serving Franklin, TN and surrounding areas

Approved

In business since 2021

Free estimates

Credit card accepted

At Invictus Electric Service Co. our mission is to serve you by delivering the highest quality electrical installations with the greatest possible efficiency. By taking the time to understand your needs and dreams, we will serve you based on our core principles: Honesty, Integrity, Fairness, Trust, Perseverance, and Work Ethic. \n \nOur team serves the greater Nashville area in a wide array of services. We don't operate call centers or sales teams, all contact requests go straight to our experts so please allow 24 hours for a reply.

2 neighbors recently requested a quote
Avatar for Tote Electric LLC
Tote Electric LLC
5.0(
7
)
Fixed Generator - InstallPortable Generator - Install

Serving Franklin, TN and surrounding areas

Approved

In business since 2025

Free estimates

Credit card accepted

"Jack was amazing. I get really worried when trying to find companies to come work on my house because I don?t know whether I can trust them or not. Tote Electric was so friendly and very professional. He will be my electrician for life. 10/10 recommend!"
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+14

8 neighbors recently requested a quote
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Generator Install FAQs, answered by experts

To determine the right size generator for your house, you should calculate the total wattage of the appliances and devices you want to power during an outage. List all essential items, note their start-up wattages, and add them together.

Here are some typical wattage requirements for common appliances:

  • Refrigerator: 600 watts

  • Large dehumidifier: 700 watts

  • Large window air conditioner: 1,400 watts

  • Water heater: 3,000 to 4,500 watts

  • Electric furnace: 5,000 to 25,000 watts

A 7,500-watt generator might be sufficient for essentials like a refrigerator, freezer, well pump, and lighting circuits. However, for high-demand items like a water heater or furnace, a whole-home generator is a better choice. A portable generator may be enough if you only need to power a few critical items.

While home square footage can offer a rough estimate, it is not always a reliable indicator. For reference, here are some typical generator sizes based on square footage:

  • 1,000 sq ft: 6–9 kW

  • 1,500 sq ft: 7–10 kW

  • 2,000 sq ft: 10–14 kW

  • 2,500 sq ft: 12–16 kW

  • 3,000 sq ft: 16–20 kW+

For the most accurate sizing, consult a professional who can calculate your home's peak and average power consumption and recommend the optimal generator.

DIY is possible for basic setups. Professional installation ensures safe and proper electrical connections.

Generators run on a variety of fuel types, ranging from natural gas to solar power. Keep in mind that fuel costs varying by type:

  • Natural gas: $2,000–$21,000 per year 

  • Liquid propane: $2,000–$21,000 per year

  • Diesel: $3,000–$20,000 per year

  • Gasoline: $500–$3,000 per year

  • Solar generator: $2,000–$25,000 per unit

  • Battery backup: $10,000–$25,000 per unit

To power a central air system during a power outage, the whole-house generator will need to be at least 5,000 watts, and this number will significantly increase for larger units. Check the specific wattage requirements of your AC unit to choose the right generator size. Consider consulting a generator installer to ensure your whole-house generator meets your electrical load needs.

Here’s what you can run with different wattages and types of generators:

Portable generator:

  • 2,000 watts can handle a large appliance like a freezer or refrigerator, plus a few smaller items like phones or computer chargers. 

  • 4,000 watts will keep two large appliances operating and a few smaller devices.

  • 8,000 watts should power most essential appliances and other devices, including a sump pump, well pump, or your dishwasher.

Partial to whole-house generator:

  • 20,000 watts and above will make it seem like your home’s power is still on.

The Franklin, TN homeowners’ guide to generator installs

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