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TRUSTED BY WALTHAM, MA HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon24
    Verified generator installs reviews

Find Generator install pros in Waltham

Dever Electric
5.0(
58
)

Serving Waltham, MA and surrounding areas

Approved

In business since 2008

Free estimates

Offers commercial services

"Just an outstanding experience end-to-end with Matt. He responded to the outreach within minutes and was able to give me a quote a few hours later that was very fair. We installed an induction stovetop and needed a new 50amp circuit and line run in our old house, crawl space and all. He showed up right on time, and made quick work of it. Very professional and friendly. He even stayed a little longer after the job was complete to help me diagnose another problem. Couldn't recommend him more highly. Would hire him again in a minute."
Response time1 day
Response rate100%
49 neighbors recently requested a quote
Avatar for VMA Electric Inc
VMA Electric Inc
4.8(
465
)

Serving Waltham, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2005

Free estimates

Emergency services offered

"From the office folks to the electrician who did the work -- friendly and professional. They quoted the lowest price of three estimates and did the work within a couple of weeks. I purchased my generator elsewhere online... and VMA walked me thru the process of hooking it up, running it, and shutting it down. Very helpful."
Needham Project
22kw Generac
27kw
Response time8 hrs
Response rate100%
21 neighbors recently requested a quote
Avatar for Champion Electrical Services Inc
Champion Electrical Services Inc
5.0(
54
)

Serving Waltham, MA and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

At Champion Electrical Services, we believe homeowners deserve better. No more no-shows, rushed work, or upsells you don't need. We built this company to do things right - with respect, craftsmanship, and pride. Every project is treated like it's being done in our own home: clean, code-compliant, and built to last. Whether you need a panel upgrade, EV charger, generator, or quick repair, we show up when it counts and earn your trust every time. \nLicensed, insured, and proudly serving MA & RI. \nWhen the lights go out, don't call just anyone. Call the Champ.\n\n(774) 331-3500 \nCalltheChamp.com \[email protected]

My jobs
My jobs
My jobs
My jobs
My jobs

+17

267 neighbors recently requested a quote
Avatar for Cotti-Johnson Heating-Cooling-Electrical
Cotti-Johnson Heating-Cooling-Electrical
4.7(
166
)

Serving Waltham, MA and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 1948

Free estimates

Emergency services offered

"Jason and his team with Cotti-Johnson did an excellent job updating our electrical boxes, installing the washer/dryer hookup, and getting us setup with a generator! Sam, our assigned electrician, even took the time to go through the entire operation of the generator from A-Z. I would definitely recommend them for any electrical work!"
Navien Install
Backflow
Outdoor Shower
Well Tank Replacement
Filtration Installation

+62

Response time10 hrs
69 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for Jose Baez
Jose Baez
5.0(
25
)

Serving Waltham, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2010

Free estimates

Warranties offered

"I had called Jose about installing some ceiling lights and new switches… he was able to come out the next day and worked with my wife’s and I schedule and got the job done in a timely and professional manner. Couldn’t even tell he did work on the house very clean and neat.. once again thanks you"
kitchen lights
pool house lights
pool house
service upgrade
Response time7 hrs
Response rate99%
2 neighbors recently requested a quote
Avatar for Wilson Brothers Heating & Air Conditioning Inc
Wilson Brothers Heating & Air Conditioning Inc
4.5(
160
)

Serving Waltham, 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(
11
)

Serving Waltham, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2017

Free estimates

Emergency services offered

"Michael came to my house and upgraded my 100 amp panel to a 200 amp panel for my solar installation project I had coming up. He was very thorough in explaining all the work that needed to be done, how long I would be without power, and was very knowledgeable in all of the questions I had. After removing my service and replacing it with the new 200 amp, he went through the entire house and checked what each breaker was wired to and marked it inside my panel very neat and organized. Couldn’t be happier with the experience from start to finish. If you need any work done to your home I highly recommend Mike and I will definitely be contacting him in the future if I ever need any other work done. Thanks Mike!!!"
House remodel
House remodel
House remodel
Hot tub
House remodel

+5

Response time8 hrs
Response rate94%
20 neighbors recently requested a quote
Ray Daly Electric, Inc.
4.2(
72
)

Serving Waltham, MA and surrounding areas

Approved

In business since 1995

Free estimates

Emergency services offered

"From the initial contact via Angi to the finished installation, this was a very pleasant experience. Ray came by on the same day to check out the specific location and circumstances, and sent the very reasonable estimate the next day. We arranged for installation the following week, and the members of his team did an excellent job. We now have an EV charger that works very well. Highly recommended!"
Response time1 day
Response rate91%
12 neighbors recently requested a quote
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Generator Install questions, answered by experts

Generators are safe to use as long as they are installed and operated correctly according to the manufacturer's recommendations. The most critical safety tips are to never use a portable or fuel-powered generator inside an enclosed space due to the risk of lethal carbon monoxide poisoning; always operate it outdoors where fumes can dissipate away from your home. Additionally, never attempt to connect a generator to your home’s electrical panel yourself—hire a professional to ensure the setup meets safety standards. Finally, avoid overloading the generator by not connecting more appliances than it is rated for, as this can damage your equipment or cause a fire.

You can expect a diesel generator to last for up to 30,000 hours of use, which works out to 20 to 25 years with the proper maintenance, of course. That depends on how much you use it, so a diesel generator used for emergencies a couple of times a year will last a lot longer than a generator that takes over for a faulty electrical grid every month for a day or two. 

You can determine what size generator you need for a transfer switch by matching the switch to the largest outlet on your generator. Larger generators can power up to 10 circuits, while most 5,000-watt generators can provide power to six circuits. So, if your generator’s largest outlet is 30 amps, you’ll need a 30-amp transfer switch.

Natural gas and electricity rates vary significantly based on location, and pricing can change over time, too. It’s possible that in locations where natural gas is particularly inexpensive, it will cost less than grid-based electricity will. However, you should also factor in the generator’s initial costs and maintenance needs, as well as its noise level and if it can comfortably power all your home appliances.

Yes, installing a generator usually increases your property value because buyers are getting the added peace of mind knowing they’ll be able to maintain power through blackouts. In most cases, you should see close to a 100% return on investment (ROI). Keep in mind that home generators usually need a permanent foundation, and installing a concrete slab will likely raise your property taxes slightly.

The Waltham, MA homeowners’ guide to generator installs

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