PanelCensus

Solar installations in Massachusetts

140,908 recorded installations — prices, growth by year, county breakdown and the installers doing the work.

Dataset updated . Refreshed from LBNL's Tracking the Sun public releases.

Installations
140,908
Total capacity
4.0 GW
Median price
$4.17/W
pre-incentive
Third-party owned
53%
lease / PPA

Most active

Top installers in Massachusetts

#InstallerInstalls in MA
1Sunrun36,668
2Tesla Energy23,018
3Trinity Solar12,458
4Direct Energy Solar Formerly Astrum3,361
5Roof Diagnostics Solar3,086
6Boston Solar2,932
7Sungevity Development2,795
8Next Step Living2,360
9Sunbug Solar2,356
10Rgs Energy2,042
11Revolusun1,671
12Freedom Forever1,633
13Pv Squared1,616
14Solarflair Energy1,615
15My Generation Energy1,305

Massachusetts installer directory →

Growth

Installations by year

2005
93$8.23/W
2006
262$8.63/W
2007
215$8.66/W
2008
382$8.45/W
2009
793$8.02/W
2010
799$6.70/W
2011
1,389$5.96/W
2012
3,287$5.00/W
2013
5,195$4.98/W
2014
9,417$4.90/W
2015
21,182$4.86/W
2016
23,847$4.50/W
2017
12,132$3.99/W
2018
11,613$3.89/W
2019
11,374$3.46/W
2020
11,816$3.46/W
2021
13,146$3.46/W
2022
9,357$3.77/W
2023
4,406$3.89/W

Bars: recorded installs · right column: median $/W that year.

By county

Solar by county in Massachusetts

CountyInstallsCapacityMedian $/W
Middlesex County29,951571.4 MW$4.08/W
Worcester County19,092951.3 MW$4.24/W
Essex County14,383225.8 MW$4.10/W
Bristol County13,201413.1 MW$4.20/W
Norfolk County11,956274.7 MW$4.03/W
Barnstable County11,363188.8 MW$4.25/W
Plymouth County11,023401.2 MW$4.24/W
Hampden County7,954311.0 MW$4.05/W
Hampshire County6,278178.2 MW$4.23/W
Suffolk County6,13082.1 MW$4.29/W
Berkshire County4,025187.7 MW$3.95/W
Franklin County3,326117.5 MW$4.24/W
Dukes County1,57725.9 MW$4.85/W
Nantucket County2495.2 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?

LBNL's Tracking the Sun dataset records 140,908 residential and small-commercial solar installations in Massachusetts, totalling 4.0 GW of capacity. (Coverage depends on the state's reporting programs, so actual totals are higher.)

How much does solar cost per watt in Massachusetts?

The median installed price across priced systems in Massachusetts is $4.17/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 (36,668), followed by Tesla Energy (23,018).