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    Average homeowner rating
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    Verified generator installs reviews

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

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

"We had a list of items that needed to be completed (driveways lamps posts/lighting, cathedral ceiling fan, various fixtures, etc.) and a couple of more involved projects we were thinking of doing, like a hot tub installation. Harland Electric was responsive, prompt, courteous and professional throughout the entire process—from initial contact, estimate and work. They itemized each of the projects so that we could pick and choose the work that needed to be done, and were helpful in detailing the complexities of certain projects and weighing the pros and cons of having electrical work done. During the course of coming to the house and knocking every item off of our list (which took 1.2 days worth of work/time), they also alerted us to an electrical fire hazard for an outdoor flood light that another electrician from another previous company just left and said was okay. They replaced the entire light and wiring and now it looks great the way it illuminates our side yard! We even overpaid at the end of the project and they immediately let us know! They are scheduled to return in the spring to install a pool heater and we have no doubt they will do a great job. Overall, great service, highly ethical company and good value overall. Highly recommend!"
Response time2 days
1 neighbors recently requested a quote
Recommended by96%of homeowners
T K Lyden Electric & Generator, Inc.
3.9(
114
)
Fixed Generator - InstallFixed Generator - RepairPortable Generator - Install

Serving Groton, MA and surrounding areas

Approved

In business since 1994

Free estimates

Credit card accepted

T.K. Lyden Electric & Generator Inc. is a family owned electrical contractor with over 50 years of experience serving Central & Western Massachusetts and Southern New Hampshire. We provide complete standby power solutions featuring Generac, Kohler, Briggs & Stratton, Honeywell, and other major brands. Our team offers installation, repairs, warranty service, and annual maintenance plans.

10 neighbors recently requested a quote
Recommended by91%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

"Our project was a panel upgrade and generator install. From the first point of contact through point of completion Kevin's level of professionalism, customer service and follow through were beyond exceptional. He is very skilled and knowledgeable in the electrical field. He was able to answer all of our questions and we knew we made the right choice. Once the scope of work was determined and a date/time established he arrived on time and completed the work promptly and neatly. We are extremely pleased with Kevin's work. In fact we have other electrical projects planned in the near future and we will be reaching out to Kevin. For anyone searching for an electrician Kevin is the right person and I can assure you that you will not be disappointed."
Service upgrade
Response time6 hrs
Response rate98%
1 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.
6 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Michael J Roberts
Michael J Roberts
5.0(
12
)
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

"Michael replaced all the dimmers throughout my home and workspace… and he replaced a kitchen fan with lights for me… and fixed an antique lamp that had great sentimental value for me. He was on time and priced each job fairly. I am grateful for his work every time I dim a light and run the fan to cool my home during the warm er months of the year. I am planning on having Michael replace my outdoor walkway lights this spring."
House remodel
House remodel
House remodel
Hot tub
House remodel

+5

Response time8 hrs
Response rate94%
17 neighbors recently requested a quote
Avatar for Joe Freel
Joe Freel
5.0(
5
)
Fixed Generator - InstallPortable Generator - Install

Serving Groton, MA and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

"If you are looking for an honest, hard-working, and highly skilled electrician, look no further. I hired him to handle a massive job—taking my entire house off old knob-and-tube wiring and upgrading the main electrical panel.Rewiring a whole house is an enormous project, but he made the entire process seamless. He was incredibly neat, organized, and respectful of my home from start to finish. He kept me updated every step of the way, answered all my questions, and made sure every single detail was perfectly up to code. The new panel looks fantastic and is beautifully labeled.It is such a relief to have peace of mind knowing the job was done right by a true professional. His work ethic is outstanding, his pricing is fair, and I would recommend him to anyone in a heartbeat. Five stars!"
5 neighbors recently requested a quote
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Generator Install FAQs, answered by experts

In some situations, yes. Never try to put biofuel into any home generator without checking the specifics first. If a generator has the ability to run on diesel, it can also run pure biofuel (the clear kind made from seed oils, for example). But if you are using biofuel made from animal fats or vegetable oils, the generator will need significant modifications before it can handle a sludgier type of biofuel.

With proper maintenance, a whole-house generator can last between 20 and 40 years. The specific lifespan depends on how often and for how long the generator is used, and some models may have their life expectancy rated in hours of operation. To maximize its lifespan, expect to spend around $150 to $300 per year for annual maintenance checks from a qualified technician. During these checks, a technician will inspect the engine filter, starting mechanism, fuel, lubrication, and coolant levels. Consulting your installer and choosing a low-impact fuel like natural gas or diesel can also help ensure your generator lasts as long as possible.

Yes. You can connect your home back-up battery to a generator with its designated charger. Be sure that the output of the generator matches the input requirements for the battery for best results.

Homeowners can often access federal tax credits, such as the Investment Tax Credit (ITC), which covers a percentage of installation costs. Many states and utilities offer additional rebates, grants, or performance-based incentives. These programs can significantly lower your upfront investment. Check the Database of State Incentives for Renewables and Efficiency (DSIRE) or contact your local energy office for current offers.

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.

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.