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Avatar for Invictus Electric Service Company, LLC
Invictus Electric Service Company, LLC
4.7(
25
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+3 more

Serving Bellevue, TN and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Free estimates

Emergency services offered

"Dave was more than knowledgeable about installing accent lighting and adding a dimmer to our cabinets. He walked us through the process and cleaned up after he was finished. Professional, well-spoken, and well worth it. Looking forward to when he comes out to do our ceiling fans and closet lights"
Electrical Project
Electric Vehicle Charger Install
Electric Vehicle Charger Install
Electrical Project
Electrical Project

+63

Response time1 day
Response rate100%
5 neighbors recently requested a quote
Avatar for Top Notch Electrical Group llc
Top Notch Electrical Group llc
5.0(
5
)
Fixed Generator - InstallPortable Generator - InstallFixed Generator - Repair+1 more

Serving Bellevue, 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
26 neighbors recently requested a quote
Avatar for Sensible Home Services LLC
Sensible Home Services LLC
5.0(
16
)
Portable Generator - Install

Serving Bellevue, TN and surrounding areas

Approved

In business since 2012

Free estimates

Emergency services offered

"Michael and his team were professionals and solved our electrical issues quickly and affordably. They were kind and trustworthy. I'll be certain, hands down, to call them when I need any electrical services performed in the future!! I'd recommend them to my friends! If anyone is looking for an experienced, knowledgeable, friendly, kind, and trustworthy team...call them right away, you'll be satisfied with the results and your experience!"
Lighting Upgrade
Lighting Upgrade
Lighting Upgrade
Lighting Upgrade
Lighting Upgrade

+19

Avatar for On Site Industrial Electrical LLC
On Site Industrial Electrical LLC
4.2(
13
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+2 more

Serving Bellevue, TN and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

"These young men took the inner working of the main electrical power distribution center of my house loose. Dismantled the connections and removed the panel, installed A new panel box, installed all the proper breaker and connected the wiring back in the right order. All in all an amazing feat to be completed in the time in was done. Puled up to the house at 7 in the morning and by 1:30 early the same afternoon power shut off to the house, MDP (main distribution Panel) and all associated hardware switched over, inspected and approved by State Electrical Inspector, and power restored. WOW. This company is about a year old and the young man that owns it is old school. His thinking is simple and straight forward. If I need work done and I'm in the area, one decision will be easy to make.
"
1 neighbors recently requested a quote
Recommended by15%of homeowners
Tyler Lauria
5.0(
7
)
Fixed Generator - InstallPortable Generator - Install

Serving Bellevue, TN and surrounding areas

Approved

Free estimates

Emergency services offered

Small jobs welcome

"Tyler installed an EV charger in my garage. He was very professional and kept me informed from first contact of arrival time and stuck to it or made me aware of any delays. He was meticulous in his work and stayed late into the night until the job was done. I will hire him again in the future for my electrical needs."
78 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 Bellevue, 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
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Generator Install questions, answered by experts

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.

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.

The amount of time a standby generator can run continuously is around 3,000 hours on average. However, standby generators can generally run indefinitely as long as they have a continuous fuel supply. Generators hooked up to a home’s natural gas supply are the best option for extended usage, as these won’t rely on a finite fuel supply based on how much you have in storage. Generators running on liquid propane or diesel won’t last as long, as these require fuel storage and regular refueling to stay running.

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.

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.

The Bellevue, TN homeowners’ guide to generator installs

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