Great Sky Solar

Great Sky Solar has spent 14 years building a reputation in the greater Boston area as a solar installer that prioritizes precision over volume. Based in Lexington, they operate in one of the most competitive solar markets in the country, where high electricity rates and strong state incentives have attracted dozens of installers. What sets Great Sky apart is the caliber of their work and the consistency of their customer experience.

Their perfect 5.0-star Google rating across 576 reviews is the standout metric in our Massachusetts evaluation. Maintaining a flawless average across that many customers requires more than good installations. It requires responsive communication, accurate production estimates, clean project management, and follow-through on warranty and maintenance requests. Based on the review data, Great Sky appears to deliver on all of these.

The company is NABCEP certified and has developed deep familiarity with Massachusetts' SMART program, which provides ongoing kilowatt-hour-based compensation that can significantly improve the economics of a solar investment. Their team helps homeowners navigate the state's incentive landscape, including the state tax credit, sales tax exemption, and net metering rules, which can be confusing for first-time solar buyers.

Great Sky Solar also brings practical knowledge of the housing stock common to eastern Massachusetts, where older Colonial and Cape Cod-style homes present unique challenges in terms of roof structure, shading from mature trees, and aesthetic considerations in historic districts.

With a composite score of 84.1, Great Sky Solar is our top-ranked solar company in Massachusetts for 2026.