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Great Sky Solar - Profile & Reviews

Great Sky Solar was founded on a vision of combining clean energy with a clean and transparent business model. We’ve created a workplace built on mutual respect and dignity, a healthy work/life balance including 4 day workweeks, excellent benefits, and a strong salary for every employee. The result? A far superior experience for our clients. We have been going above and beyond our customer's expectations for 10+ years to provide Massachusetts customers with the best custom solar solution for their homes and businesses.

107 reviews

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  • "Great Sky Solar A+++ Install, Price and especially process"

    "Great Sky Solar A+++ Install, Price and especially process"

    Reviewed May 29, 2022

    As a Professional Engineer being an SME in Sustainability one of the first things I wanted to do after moving into my "new" house (built in 2016) was add solar. I used energysage to assist in educating myself about the MA installers. I was able to build a shortlist and Great Sky Solar was on the list. I chose them because of the price, I wanted large (non-Chinese) LG new technology solar panels and service ratings. I picked LG380s and the pre-contract, contract, installation, and commissioning of the system were absolutely perfect. A special call out to Steve Connelly, the best person I have ever had working on my house. He lead the installation and performed the electrical work with competence and innovation. If I asked detailed questions he responded which great answers. I recommend Great Sky Solar to anyone who is thinking about comparing or just wants the best process, installation with the best equipment options. They helped size for today and when I eventually purchase an EV, A very satisfied Customer.

  • "Felt Great going green"

    Reviewed May 09, 2022

    The entire team at Great Sky are great.

    The process was really simply. When seeking quotes, GS stood above the pack as they had an all in price - no changes on the final invoice. They were communicative. They wanted to not only get our install performed, but educate us during the process. Where they were delays (supply chain!) they were very upfront, and we ended up feeling well informed. Permits were all taken care of, paperwork filed for connections, rebate, etc etc etc. We certainly couldn't have done our install on our own, and I was glad we had a partner in David and his team.

    Two months into the deal, and we're generating more kWh than we use. So we've not only gone Great, but we've gone green, too.

  • "Great company to work with on a complex design and install"

    "Great company to work with on a complex design and install"

    Reviewed Feb 08, 2022

    I wanted to thank the team at Great Sky Solar for their great job installing solar panels at our home. Everyone from Dereck, Sam during planning and Steve, Joey, Gabriel, Valter, Danny, Justin and probably a few others during install. Installing solar at our home is complicated with many trees, multiple roof surfaces, and a desire to match the design of the house. We talked to Tesla and many solar companies including all the big national companies and smaller local companies. Google Maps was useless due to tree cover which was extensive and out of date. Many didn't even know how to start to provide an initial design. Great Sky worked with us as we explored many options of panels, inverters and layouts. The install went very smoothly in spite of starting the day after a blizzard in 10 degree weather. The install team, roofers and electricians, worked patiently with us to ensure a very clean install of the panels and electrical systems including connecting a garage sub panel for EV charging. Excellent work.

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We are small by design, connected to our community, and hire the best people. We never subcontract any portion of our work, and all of our employees enjoy strong salaries and a healthy work/life balance. On these principles, we've been able to build a truly sustainable company so we can offer you unparalleled service and expert craftsmanship.

  • Installation
  • Financing
  • Energy Auditing
  • Roofing
  • Electrical Contracting
  • Solar Repair & Maintenance
  • Community Solar
  • Energy Efficiency
  • Solar PV
  • Energy Storage

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Get a custom solar estimate for your home

Get a custom solar estimate for your home

Based on your roof and actual offers in your area

Try Solar Calculator



Great Sky Solar Headquarters

29 Mill St
Arlington, MA
02476 United States

Workmanship Warranty

Peace of mind is important. We at Great Sky Solar want to exceed your expectations and, as such, go above and beyond to ensure our solar power systems work smoothly. In the unlikely instance that problems arise with your array, we offer a full warranty on all of our installation work. This includes any parts and labor associated with repairing or replacing your system. Additionally, our work is warrantied for any damage or problems associated with the installation of the solar panel array.


Sustainable Business Network of Massachusetts (SBN), Climate Action Business Association (CABA), Solar Energy International (SEI)


North American Board of Certified Energy Practitioners (NABCEP), Solar Energy International (SEI), REC ProTrust Certified Installer


Electrician, CSL, Home Improvement


We're a fully insured company, including full liability insurance for any damages or repairs to your property.

States served by Great Sky Solar

  • Massachusetts MA