Solar installations in Massachusetts
158,257 recorded installations — prices, growth by year, county breakdown and the installers doing the work.
Dataset updated . Sources: LBNL Tracking the Sun + city permit records + state programs + USGS/EIA utility-scale.
Most active
Top installers in Massachusetts
| # | Installer | Installs in MA |
|---|---|---|
| 1 | Sunrun | 37,161 |
| 2 | Tesla Energy | 23,191 |
| 3 | Trinity Solar | 12,480 |
| 4 | Direct Energy Solar Formerly Astrum | 3,361 |
| 5 | Roof Diagnostics Solar | 3,086 |
| 6 | Boston Solar | 3,016 |
| 7 | Sungevity Development | 2,795 |
| 8 | Sunbug Solar | 2,436 |
| 9 | Next Step Living | 2,360 |
| 10 | Rgs Energy | 2,045 |
| 11 | Revolusun | 1,671 |
| 12 | Freedom Forever | 1,633 |
| 13 | Solarflair Energy | 1,621 |
| 14 | Pv Squared | 1,616 |
| 15 | My Generation Energy | 1,314 |
Growth
Installations by year
Bars: recorded installs · right column: median $/W that year.
By county
Solar by county in Massachusetts
| County | Installs | Capacity | Median $/W |
|---|---|---|---|
| Middlesex County | 35,041 | 1.1 GW | $4.01/W |
| Worcester County | 19,529 | 2.2 GW | $4.23/W |
| Suffolk County | 16,931 | 300.7 MW | $4.28/W |
| Essex County | 14,443 | 347.5 MW | $4.10/W |
| Bristol County | 13,368 | 804.5 MW | $4.20/W |
| Norfolk County | 12,057 | 447.0 MW | $4.02/W |
| Barnstable County | 11,421 | 291.3 MW | $4.25/W |
| Plymouth County | 11,230 | 931.3 MW | $4.23/W |
| Hampden County | 8,083 | 713.0 MW | $4.04/W |
| Hampshire County | 6,355 | 407.6 MW | $4.22/W |
| Berkshire County | 4,121 | 421.8 MW | $3.93/W |
| Franklin County | 3,378 | 270.3 MW | $4.24/W |
| Dukes County | 1,590 | 36.0 MW | $4.84/W |
| Nantucket County | 250 | 6.6 MW | $3.85/W |
Counties derived from installation ZIP codes (Census ZCTA crosswalk) — approximate at boundaries. Counties with fewer than 50 recorded installs are shown but not indexed.
Frequently asked questions
How many solar installations are there in Massachusetts?
PanelCensus records 158,257 solar installations in Massachusetts, totalling 8.4 GW of capacity — compiled from LBNL's Tracking the Sun, city permit records, state programs and USGS/EIA utility-scale data. (Coverage depends on what the state publishes, so actual totals are higher.)
How much does solar cost per watt in Massachusetts?
The median installed price across priced systems in Massachusetts is $4.16/W pre-incentive. Year-by-year medians are shown on this page.
Who are the biggest solar installers in Massachusetts?
Sunrun has the most recorded installations in Massachusetts (37,161), followed by Tesla Energy (23,191).