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Avatar for Mr. Electric of Huntsville
Mr. Electric of Huntsville
4.5(
95
)
Fixed Generator - InstallFixed Generator - Repair

Serving Trinity, AL and surrounding areas

Approved

In business since 2001

Free estimates

Emergency services offered

"This was the first time I used Home Advisor to find a contractor. Home Advisor linked me with Mr. Electric who did an outstanding job. They were on time, on budget, courteous, professional, and totally a pleasure to work with. Thomas installed a 50 and 30 amp service for us at our property servicing two RV lots as well as installed a power pole with a meter box for the power company to tie into. Jan was a pleasure to work with as she was the voice for the company dealing from everything from scheduling to invoice as well as general questions. Jan was very pleaseant and professional. We will use Mr. Electric in the future and highly recommend their service..."
EV Charger Install
EV Charger Install
Electrical Upgrade in Home Shop
panel upgrade
panel upgrade

+15

42 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for M&S Electric
M&S Electric
5.0(
7
)
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Install

Serving Trinity, AL and surrounding areas

Approved

In business since 2006

Free estimates

Emergency services offered

We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We specialize in interior remodeling, back-up generator power, lighting upgrades, new electrical builds, and troubleshooting any electrical problem that may arise. We provide unmatched customer service! You will find us to be competitively priced, paying close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships and guarantee your satisfaction!\n

Chicken House
Chicken House
Chicken House
Chicken House
Chicken House

+8

2 neighbors recently requested a quote
Avatar for APS Lighting and Electrical LLC
APS Lighting and Electrical LLC
5.0(
5
)
Fixed Generator - Install

Serving Trinity, AL and surrounding areas

Approved

In business since 2023

Free estimates

Credit card accepted

"This is our go to electrical contractor for all of our commerical projects. They communicate clearly, arrive on time, and complete everything efficiently and professionally with quality always in mind. Their attention to detail and reliability always help the projects to run smoothly. Can’t recommend them enough for whatever you need done!"
28 neighbors recently requested a quote
Avatar for Titan Electrical Contractors, LLC
Titan Electrical Contractors, LLC
5.0(
10
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Trinity, AL and surrounding areas

In business since 1980

Free estimates

Credit card accepted

"installed upgraded fuse box from 100 to 200 amp also installed 30 amp box for motor home connection. on time and great customer service to include inspection of completed work. estimate and costs were better than expected. so glad to have TEC do the work will use again for electric work. Thank you TEC!!!"
Greenway Chevy
Grace Life Church
Grace Life Church
Greenway CDJR
SKF Bearings

+5

Response time4 hrs
Recommended by100%of homeowners
Avatar for All Seasons Electrical
All Seasons Electrical
5.0(
7
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+3 more

Serving Trinity, AL and surrounding areas

In business since 2025

Free estimates

Credit card accepted

"Grant and Blake care about the service they provide to their customers. They take pride in every part of their work and are more than qualified to take care of your electrical needs. Remember safety in any electrical installation/upgrading is important in your home or business, some people cut corners… these men do not. Highly recommend."
Response time1 day
Avatar for Blake Brothers
Blake Brothers
5.0(
2
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Trinity, AL and surrounding areas

In business since 1884

Free estimates

Emergency services offered

We've had the privilege of servicing North Alabama's plumbing, heating, cooling & electrical needs since 1884. Over 138 years of serving residential and commercial customers in Huntsville, AL, you can always be confident turning to Blake Brothers for your plumbing, electrical, heating and air conditioning services.

Issues with your drains or pipes? Blake Brothers has you covered.
From switches, to breakers and lighting fixtures, our electricians do it all!
Our team of comfort advisors are best in class and prepared to help you find the right solution for your home, family and budget!
Need electrical service? Look no further!
Protect your home's systems year-round with a Priority Advantage Membership!

+17

Recommended by100%of homeowners
Avatar for Excel Electric Solutions
Excel Electric Solutions
5.0(
4
)
Fixed Generator - RepairGenerator - Repair - For BusinessPortable Generator - Repair

Serving Trinity, AL and surrounding areas

In business since 2022

Free estimates

Emergency services offered

"Adam is a first class guy.. He came in and was able to not only get the job done in a timely manner but saved me a ton of money.. Excel Electric I appreciate all the hard work you put in for us.. I will definitely use you whenever needed.."
Recommended by100%of homeowners
Showing 1-10 of 36
Generator Install questions, answered by experts

Generally, you’ll want to keep between 60 and 70 feet between the generator and the transfer switch. There are a few reasons for this, including:

  • The distance reduces the noise coming from the generator into your home.

  • It increases efficiency because you won’t have a voltage drop from this short of a distance.

  • Prevents carbon monoxide poisoning: keep at least 15 feet between your generator and an open window. 

These advanced generators use a key fob or a smartphone app to remotely start, which is ideal for getting power back on immediately without venturing outside. This feature is more common on whole home generators, but you may be able to find it on large portable generators, too.

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

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.

If you have a transfer switch properly installed, the generator and main electrical power cannot feed the system at the same time. However, you should still shut off the power at your main circuit breaker panel before activating the generator. If you do that, you’ll simply need to shut off the generator and reset your circuit breaker once the local power comes back on.

The Trinity, AL homeowners’ guide to generator installs

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