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  • Average homeowner rating star icon4.4
    Average homeowner rating
  • Verified reviews icon49
    Verified generator installs reviews

Find Generator install pros in Windham

Avatar for Generator Supercenter of New Hampshire
Generator Supercenter of New Hampshire
5.0(
15
)

Serving Windham, NH and surrounding areas

Approved

In business since 2019

Free estimates

Emergency services offered

"Highly recommend!! In 16 years, we have never had a need for a generator. We were told we were on the hospital grid. Well, apparently, those grids change. Over the last year, we have had too many electrical problems with long outages leading us to come to the decision that it would be prudent for us to buy a generator. After doing the research and seeing all the details involved with ordering, preparation, installation, etc, we decided there are too many important details and decided to look for someone to do everything for us. It's incredibly important to know that we came to this decision in December, 2020 (height of generator demand), during a pandemic and during a time of an extreme nationwide generator shortage. While researching, we saw so many people waiting months for a generator from other companies, trying to do everything themselves, waiting for the transfer switch, then an electrician and so on. We figured we would be lucky to have it for next winter. We met with Matt Sanford, he went over everything in detail, looked at the potential sites for the generator and the propane tanks, measured, etc. He could have sold us a bigger generator, but he thought it would be a waste for us to spend extra money on a specific generator I "assumed" we needed. Matt determined the size needed, made recommendations and we, happily, gave him a down payment check. He said 4-6 weeks. I still had my doubts, but here I am writing a review 4 weeks later, because the installation is complete. It is a two-day process. The workers who installed it showed up shortly before the expected time with masks on, were clear and concise, informative, professional and were very courteous of their surroundings including inside the house. In all honesty, I was floored with their demeanor. They completely took me by surprise and it was well above my expectations. When they called to book the installation, I was told the electricity "could be" out for several hours. We planned for several hours. When they arrived, they said it would be an hour or two. It was out for 15 minutes. They do as much as they can in advance so the power is out for as little time as possible, but there can be issues. DO NOT plan that your power would be out for that short period of time. Plan for the worst and hope for the best. The next person, who installs the gas portion, arrived bright and early the next day. He was just as nice, informative and professional as the workers the day before. The communication from the company is stellar. The people they have working for them are fantastic. I cannot say enough good about our entire experience. You WILL NOT be disappointed. By the way, here's something I didn't even know existed until Matt told me about it. Ask about the house surge protector. Even my insurance company had never heard of it. I wish I had known about it when it came out. Also, based on the work involved with the generator, it is comforting to know we are paying them for maintenance, monitoring, etc. In my opinion, this is a complicated machine to install and maintain. They see everything our generator is doing and if something is not right, they'll send someone out before we even know something is "not right". You don't want to be caught in a major outage and have a failing system. You go through the big expense of buying it and installing it, make sure it's taken care of on a regular basis by a professional just like your car, home heating system, etc. I highly recommend this company."
Completed 22kW Generac Standby Home Generator Installation -  With GenMon MobileLink installed, our 24/7 monitoring program which includes annual maintenance!
Automatic Transfer Switch Installed - shown on the left with the customers electrical panel on the right.
Additional Photos
Additional Photos
Additional Photos

+5

Response time5 days
2 neighbors recently requested a quote
Recommended by66%of homeowners
Avatar for Pellerin Electric, LLC
Pellerin Electric, LLC
4.6(
84
)

Serving Windham, NH and surrounding areas

Approved

In business since 2006

Free estimates

Warranties offered

"Upgraded the service to the house, grounds, new/larger primary panel, sub-panel installed in garage, exterior generator wired. Very neat/clean work, very quick. Very happy."
3 neighbors recently requested a quote
Recommended by98%of homeowners
Avatar for ARETE ELECTRIC
ARETE ELECTRIC
5.0(
20
)

Serving Windham, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2012

Free estimates

Credit card accepted

"They were very professional, cleaned up the area as they finished. They installed a They installed a combo mini split system with three inside heads . They arrived on time and completed the job in one day . They were very efficient and the installation was perfect"
Response time3 days
7 neighbors recently requested a quote
Recommended by5%of homeowners
Avatar for LIGHTHOUSE ELECTRIC LLC
LIGHTHOUSE ELECTRIC LLC
4.9(
35
)

Serving Windham, NH and surrounding areas

Approved

In business since 2023

Free estimates

Customers say: Quick response

"These guys are great. Isaac called me within 10 minutes of submitting a quote request and was able to come out in just a few days. Less than a week later, charger was installed and working great."
Generator 1
Generator 2
Generator 3
Generator 4
Generator 5

+19

Response time7 hrs
Response rate93%
4 neighbors recently requested a quote
Avatar for PEAK POWER NH LLC
PEAK POWER NH LLC
4.9(
51
)

Serving Windham, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2000

Free estimates

Emergency services offered

"I used Peak Power to install the electric for an above ground pool we had installed. Adam with Peak was incredibly helpful and responsive. My pool installers had many delays and ultimately finished the pool almost a month after the initial planned install. Adam/Peak were responsive to the ever shifting timeline and made it out within a few days of the completed pool install and almost a month after the plan. The scope of the project increased a little based after the final install and the Peak team was up front, honest and fair about the additional work and materials required. I would highly recommend Peak for all your electric needs."
dining room
kitchen
vanity mirrors
Response time8 hrs
Response rate98%
9 neighbors recently requested a quote
Avatar for Krafton Electric, LLC
Krafton Electric, LLC
4.6(
119
)

Serving Windham, NH and surrounding areas

Approved

In business since 1990

Free estimates

Customers say: True professional

"I have to say that David Krafton is an excellent electrician. I. Called him about a. light. Over. My sink that I could not fix by replacing the bulbs. He came out and told. Me the light was not working, as it was shorted out. He then went and bought me a new light and installed it. It works get and is so much brighter the the previous one. Thank you David I will be calling you again to do other work for me. Loraine in Bedford N.H."
kitchen renovation
kitchen renovation
existing 100 amp service panel
old and existing circuit breaker electrical panel
existing

+5

Response time1 day
Recommended by97%of homeowners
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Generator Install questions, answered by experts

Yes, natural gas generators can work without electricity. Natural gas generators are a common type of backup or whole-house generator that operates when the electrical grid isn’t working. The trick is using a transfer switch (which usually needs to be installed with the generator) that safely switches the home electrical system from the power grid to generator power when needed.

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. 

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.

Whole-house generators need to be installed on level ground several feet away from walls and other objects. Because they tap into the electrical system directly, they usually need to be close to your home electrical panel for a transfer switch installation. It also helps with installation if they are near to a gas line or propane tank installation.

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 Windham, NH homeowners’ guide to generator installs

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