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Harland Electric Inc
4.9(
137
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Groton, MA and surrounding areas

Approved

In business since 1996

Free estimates

Emergency services offered

"Bill walked me through checking the outlet and circuits. We solved the problem with no service call needed. Harland has been my electrician since the early 2000's. They have completed many projects/repairs small and large (full panel replacement after water damage to installing a exterior spotlight). Staff answering calls is pleasant and professional, Bill gets back to customers usually the same day."
Additional Photos
Response time2 days
3 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Kevin Kelley Electrical LLC
Kevin Kelley Electrical LLC
4.9(
35
)
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Install

Serving Groton, MA and surrounding areas

Approved

In business since 2022

Free estimates

Emergency services offered

"Kevin did a great job installing my ceiling fan. Professional and personable and kept let me know what he needed to do to get job done. Job was completed quickly and workmanship was excellent. I would Highly recommend him to people I know."
Service upgrade
Response time6 hrs
Response rate98%
Recommended by91%of homeowners
Avatar for A&A Electrical LLC
A&A Electrical LLC
5.0(
9
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Groton, MA and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

"I hired A&A to upgrade my light fixtures, add an electric car charger and fix various outlet issues. What I received was above and beyond my expectations. I highly recommend them for any electrical service you may need."
Solar installation
Solar installation
Solar installation
Solar installation
Solar installation

+18

Response time6 hrs
Response rate100%
6 neighbors recently requested a quote
Avatar for Wilson Brothers Heating & Air Conditioning Inc
Wilson Brothers Heating & Air Conditioning Inc
4.5(
160
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+2 more

Serving Groton, MA and surrounding areas

Approved

In business since 1987

Free estimates

Emergency services offered

"The furnaces were replaced in two different houses without any problems. The generator was placed in one of the houses with many delays. Waiting for parts we were told. When it was finally assembled it worked but daily test runs were happening. When we called to have our yearly check we were told it should only run once a week. A part needed to be replaced. Wilson Bros. shared that expense. It ran for about the next 5 years with constant maintenance but this year the mother board is gone. Wilson Bros have been wonderful but I question the quality of their equipment. One of the gas furnaces also requires costly maintenance. We never had this with our other gas furnaces. Love Wilson Bros. Don't like their replacement equipment. I just thought new things should last a little."
Three of the five heads are marked by the numbers in the blue circle. On the inside of the house is where you will find the mounted units. The slim ducts run alongside the white arrows and will eventually be covered to match the exterior of the house.
The slim ducts in the basement ceiling that connect from the branch box all the way to the 5 different heating and cooling units. These will be covered by the ceiling tiles once the job is finished.
4 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Michael J Roberts
Michael J Roberts
5.0(
11
)
Fixed Generator - InstallPortable Generator - Install

Serving Groton, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2017

Free estimates

Emergency services offered

"I have called Michael into a few projects. He offers an array of services from wiring a full house to simple fixtures. He recently separated a four family offering all new meters and main panels. When it comes to electrical I don’t think there is anything he can’t do. Without hesitation, I recommend him to all."
House remodel
House remodel
House remodel
Hot tub
House remodel

+5

Response time8 hrs
Response rate94%
20 neighbors recently requested a quote
Avatar for Phillip Aiello Electrician
Phillip Aiello Electrician
5.0(
2
)
Generator - Install - For BusinessPortable Generator - Install

Serving Groton, MA and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

"An excellent electrician. Prompt, well prepared, and efficient process. Did a great job of replacing our 65 year old fuse box with a new breaker box as well as wiring the stove and the dryer bringing everything up to code. I highly recommend Phil for an electrical work you might have!"
200 amp meter disconnect and riser
panel
panel
Response time3 hrs
Recommended by100%of homeowners
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Generator Install questions, answered by experts

A 10,000-watt generator can run a small to mid-sized central AC unit (typically up to 3 tons or 36,000 BTU) along with a few other appliances. However, larger AC units or additional loads will require a bigger generator. Consult a local generator installer to ensure you add the correct size generator to your home.

Yes, in most municipalities, you will need a permit to install a permanent home generator, including emergency backup, partial-home, and whole-home models. Because these installations involve significant alterations to your home's electrical system and produce exhaust fumes, local governments often require a permit or inspection for safety purposes. A generator permit typically costs between $50 and $250, depending on your location. Your electrician or certified installer can usually handle the permitting process for you, but you will be responsible for the cost. It's a good practice to confirm with your installer that they will pull all necessary permits before work begins.

Sizing a generator is a careful process that requires calculating the electrical load of your entire house. You have to take into account every device you want to use and their wattage requirements, plus the wattage needed to start them, and look for a generator that can safely run all that at around 80% capacity.

In more practical terms, a small home can run on a 10,000-watt generator (and if you only want to power a few key appliances, much less than that). A mid-sized home may need something between 15,000 and 22,000 watts. Larger homes require 25,000 watts or more. 

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.

Carbon monoxide emissions aren’t only dangerous to human life, but they also harm our planet. While natural gas generators emit lower levels of CO than other fuel sources, there are still ways to reduce emission levels. For example, shop around for an eco-friendly generator that complies with current emission standards. Also, make sure your generator is serviced regularly to avoid CO buildup. 

The Groton, MA homeowners’ guide to generator installs

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