Solar installations in Massachusetts
159,720 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 | 37,343 |
| 2 | Tesla | 23,157 |
| 3 | Trinity Solar | 12,488 |
| 4 | Direct Energy Solar | 3,362 |
| 5 | Roof Diagnostics Solar | 3,086 |
| 6 | Boston Solar | 3,051 |
| 7 | Sungevity | 2,797 |
| 8 | Sunbug Solar | 2,458 |
| 9 | Next Step Living | 2,360 |
| 10 | Rgs Energy | 2,045 |
| 11 | Revolusun | 1,680 |
| 12 | Freedom Forever | 1,671 |
| 13 | Pv Squared | 1,623 |
| 14 | Solarflair Energy | 1,621 |
| 15 | My Generation Energy | 1,325 |
Growth
Installations by year
New installs per year and the running cumulative total, plus % of homes with solar (ACS housing units).
By county
Solar by county in Massachusetts
| County | Installs | % homes | Capacity | Median $/W |
|---|---|---|---|---|
| Suffolk County | 10,813 | 3.1% | 218.6 MW | $3.01/W |
| Middlesex County | 5,167 | 0.78% | 495.2 MW | $2.57/W |
| Worcester County | 552 | 0.16% | 1.3 GW | $2.95/W |
| Plymouth County | 245 | 0.11% | 537.0 MW | $2.75/W |
| Bristol County | 195 | 0.08% | 391.7 MW | $3.05/W |
| Essex County | 168 | 0.05% | 122.4 MW | $3.43/W |
| Hampden County | 148 | 0.07% | 409.2 MW | $2.72/W |
| Norfolk County | 139 | 0.05% | 172.6 MW | $3.01/W |
| Berkshire County | 105 | 0.15% | 251.1 MW | $2.57/W |
| Hampshire County | 88 | 0.13% | 229.5 MW | $2.96/W |
| Barnstable County | 62 | 0.04% | 103.4 MW | $2.77/W |
| Franklin County | 59 | 0.17% | 152.9 MW | $2.49/W |
| Dukes County | 16 | 0.09% | 10.0 MW | $3.52/W |
| Nantucket Countylimited | 3 | 0.02% | 1.4 MW | $6.20/W |
Counties derived from installation ZIP codes (Census ZCTA crosswalk) — approximate at boundaries. Counties marked limited have under 10 recorded installs, so their medians and penetration are indicative only. % homes = recorded installs ÷ housing units (U.S. Census ACS 5-Year, B25001).
Search every recorded Massachusetts installation — by installer, size, date, storage and equipment.
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Top solar equipment in Massachusetts
| # | Panel manufacturer | Systems |
|---|---|---|
| 1 | Hanwha SolarOne | 714 |
| 2 | Trina Solar | 671 |
| 3 | LG Electronics Inc. | 629 |
| 4 | Qcells North America | 582 |
| 5 | SunPower | 564 |
| 6 | LG Electronics | 522 |
| 7 | CSI Solar Co., Ltd. | 508 |
| 8 | Canadian Solar | 432 |
| # | Inverter manufacturer | Systems |
|---|---|---|
| 1 | Yaskawa Solectria Solar | 3,105 |
| 2 | SolarEdge Technologies Ltd. | 1,296 |
| 3 | SolarEdge Technologies | 1,151 |
| 4 | SMA America | 825 |
| 5 | HiQ Solar | 219 |
| 6 | Advanced Energy Systems | 206 |
From recorded equipment on Massachusetts systems (Tracking the Sun + state/permit data); counts are systems where the manufacturer is known.
Developers
Top solar developers in Massachusetts
| # | Developer | Systems |
|---|---|---|
| 1 | SolarCity Corp | 762 |
| 2 | Sunrun Installation Services | 471 |
| 3 | Kyle Greene | 406 |
| 4 | Stephen Kelly | 382 |
| 5 | Philip Kapitan | 188 |
| 6 | Stephen A Kelly | 163 |
| 7 | Tesla Energy | 158 |
| 8 | NATHAN ASHE | 155 |
Developer/EPC named on the permit or program record — often the same firm as the installer.
Frequently asked questions
How many solar installations are there in Massachusetts?
PanelCensus records 159,720 solar installations in Massachusetts, totalling 8.6 GW of capacity — about 5.3% of the state's 3,014,657 housing units (U.S. Census ACS) — 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 $4.15/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 (37,343), followed by Tesla (23,157).