Take advantage of Boston Solar’s installation guarantee! When you buy solar panels by Oct 16, 2021 we’ll guarantee your installation by the end of the year or we’ll pay you $1,000! Click here to learn more about this limited-time offer and why we’re the best solar company for your Massachusetts solar panel installation.Take advantage of Boston Solar’s installation guarantee! When you buy solar panels by Oct 16, 2021 we’ll guarantee your installation by the end of the year or we’ll pay you $1,000! Click here to learn more about this limited-time offer and why we’re the best solar company for your Massachusetts solar panel installation.