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Sunergy Solutions is a Londonderry, NH solar installer with 5 stars from 109 Google ratings, and many of its reviews come from homeowners who say they shopped several companies first. Its site describes solar, roofing and gutter work across New England and Virginia. Customers often name their salesperson. In a run of November 2025 Google reviews, several homeowners credited Devyn Cote with guiding them from signing to switch-on; one noted Sunergy's estimate was slightly higher than others but said the install crew and the communication through weather delays made it worth it. An October 2025 reviewer said Sunergy came in well below a national brand's quote with an array that produced more. A church in Milford, NH wrote in October 2025 that Sunergy installed a 45.5kW, 107-panel system a year earlier and its electric bill is now $0. Another October 2025 customer described a 10.5kW array on an 1890 home installed in a day. A November 2025 reviewer had a roof stripped, two leaks repaired and the roof reshingled in one day. The problems people describe are mostly about paperwork and follow-up. In December 2025, a customer said they were signed up for two loans after the first lender went bankrupt, were reimbursed for four months of double payments but were still being charged and could not reach anyone. A 2024 reviewer said the project took almost six months against a promised 90 days, and production came in at 73.9% of the contract; Sunergy sent a check for the shortfall within a day and later covered tree work to fix shading. A ground-mount customer who reviewed in May 2025 added in later updates that an EV charger request and a message to the engineer went unanswered, though a technician was eventually sent to replace failing components. In Massachusetts, the registry lists home improvement contractor registration #202876 as active for Sunergy Solutions, Inc., and construction supervisor licence CS-109127 as active for Alexander K DeFreitas. BBB grades the company A+ and lists it as accredited.
“I can vouch for Sunergy Solutions in New Hampshire. They were quick and did good work on the solar project at my house.”
“# Sunergy Solutions LLC v. Underriner (trial court document), District Court, D. Massachusetts, 2025 ... UNITED STATES DISTRICT COURT DISTRICT OF MASSACHUSETTS _______________________________________ ) SUNERGY SOLUTIONS LLC, et al., ) ) Plaintiffs, ) ) Civil Action No. v. ) 24-12593-BEM ) KEVIN UNDERRINER, et al., ) ) Defendants. ) _______________________________________) MEMORANDUM AND ORDER ON DEFENDANTS’ MOTION TO DISMISS MURPHY, J. Defendants Quinn Allen and QKM Consulting, Inc. (“QKM”) (collectively, “Defendants”)1 have moved to dismiss the claims made against them by Plaintiffs Sunergy S”
Sunergy solutions installed our solar panels in 2024. Our consultant, Jeff Deming, was professional, knowledgeable, and responsive whenever we reached out with questions. He worked within our budget and helped find us options for financing. Installation was efficient and professional. The installers worked to ensure that the aesthetics of the house would be minimally altered by wiring, electrical boxes, etc. We had one issue where a row of panels stopped producing (unknown reason) but Jeff ensured a technician came out quickly to fix the issue. This is a great company to work with and we have recommended them to others looking for residential solar. Thank you, Sunergy Solutions, for the great work you do.
This has been our second solar installation. The experience has been first rate all the way. Once we decided on a plan, everything went seamlessly. We have made recommendation to a number of our friends.
This is an amzing outfit! Love these guys
I had an outstanding experience working with Sunergy solutions for my solar installation. From start to finish, their team was professional, responsive, and incredibly knowledgeable. They walked me through the entire process, answered all of my questions clearly. The project move forward quickly and efficiently, and everything was completed right on schedule. The quality of work was what really stands out. Everything was done to precision and attention to detail you can tell they take real pride in what they do. I highly recommend Sunergy solutions. It was a pleasure to find a company that delivers this level of service and craftsmanship.
Rob and the entire team at Sunergy have been great to work with. They took the time to explain everything clearly and made sure I felt comfortable throughout the entire process. From the proposal and installation to permits and ongoing support, Sunergy has been excellent every step of the way. My father used Sunergy for his solar project and later recommended them to three other friends. After my own experience, I can see why. I will definitely be recommending them to my friends and will use them again for any future solar service needs.
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3 changes recorded — last scanned Sep 2, 2026.
100 to 200 amp service upgrade4.1
