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Southcoast Greenlight Energy, of Swansea, describes itself on its website as a full-service renewable energy contractor focused on solar and geothermal HVAC design and installation, with energy recovery, batteries and EV charging stations as additional services. The website also says the company has been in business 48 years. It holds an A+ grade from the BBB and 4.9 stars from 27 Google ratings. A 2023 customer said Southcoast Greenlight installed a geothermal Climate Master system after Gap Mountain Drilling of New Hampshire did the drilling, and that Jon Cyr and Tim Tait installed it in one week, with the ductwork already in place. That 2023 customer said the new system was quieter than their dehumidifier. In a 2023 review, a customer whose house had no ductwork said the company did a complete install of the geothermal and HVAC equipment and that the work was very neatly installed. A 2023 customer wrote that Sal recommended a system that replaced their old propane heating system and kept them cool in the summer. A 2021 customer said the company installed geothermal and solar systems for their new construction, followed up in a timely fashion on unresolved issues, and later added a second solar system on their garage. A 2021 customer said that after a big storm caused six days of power outages, the company walked them through getting their inverter back online without charges, on panels it had installed in 2009. A 2022 reviewer wrote that their solar panels, installed in October 2017, had no issues or problems. A 2021 customer said they involved the company in building a zero footprint house, and a 2025 customer called the company totally professional from start to finish.
“Designed by Southcoast Greenlight Energy, of Swansea, the carport makes use of the bank's existing parking lot. The system consists of two structures each supporting 320 solar panels.”
totally professional from start to finish.
I highly recommend Southcoast Greenlight. Gary Cyr is extremely knowledgeable and great to work with. I looked at several companies before deciding on Southcoast Greenlight. They had the best offer, the most experience, and the best reputation. Gap Mountain Drilling out of NH did the drilling (also the best around) and Southcoast Greenlight installed the geothermal Climate Master system. Jon Cyr and Tim Tait installed the system quickly and efficiently in one week (ductwork already in place). They really know the system and did a fantastic job; both also great to work with. Jon is particularly knowledgeable in all aspects of the install and maintenance. These systems are not cheap, but save over the long run, and the incentives now make these systems cost competitive. They are extremely efficient and quiet; our new system is quieter than our dehumidifier. No outside compressor so the system will last much longer, and I like the idea of drawing heating or cooling from the constant ground temperature in lieu of directly burning fossil fuels. The best heat pumps have efficiency ratings in the high 90's%. Geothermal systems like this one have efficiency ratings in the 300-400% range; hence the long-term savings. I recommend geothermal and would highly recommend Southcoast Greenlight. They are, in my opinion, the best out there.
Southcoast Greenlight Energy did a fantastic job with the installation of my geothermal system retrofit. My house didn't have any ductwork prior so they had to do a complete install of the geo and HVAC equipment. The crew was great to work with, respectful, and accommodated all my requests. The work was very neatly installed and I have zero complaints on the quality of the install. At the time of this review I have owned my system for about 1 year and I am very happy with the performance of the system and the cost savings. I highly recommend Southcoast to anyone considering the technology.
Sal answered all my questions, even the ones about water heaters etc. The system he recommended completely replaced my old propane heating system and keeps us cool in the summer as well. Installation crew was great to work with and did a great job handling a complicated installation.
Good communication, very good workmanship, stayed till job was complete. Could not have asked for a better experience
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1 change recorded — last scanned Oct 9, 2026.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from Southcoast Greenlight Energy, Inc.. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$5,000 – $11,400
Typical HVAC project around $8,200
