Solar installations in Middlesex County, MA
5,164 recorded installations in Middlesex County, Massachusetts — capacity, prices and the installers doing the work.
Dataset updated . Sources: LBNL Tracking the Sun + city permit records + state programs + USGS/EIA utility-scale.
Severe-weather exposure: solar sites here have been matched to an average of 2.5 hail and 2.6 high-wind NOAA storm events — a regional inspection/maintenance signal (proximity, not confirmed damage).
Search every recorded installation in Middlesex County by installer, size, date and equipment.
Search sites →Independent check:Stanford's DeepSolar detected about 29,266 solar arrays here from 2018 satellite imagery — our recorded data covers roughly 18% of that (this county is under-reported in public program data). A yardstick, not dated records.
Most active
Top installers in Middlesex County
| # | Installer | Installs here |
|---|---|---|
| 1 | Boston Solar | 78 |
| 2 | Great Sky Solar | 65 |
| 3 | Trinity Solar | 54 |
| 4 | Sunbug Solar | 53 |
| 5 | Sunrun | 36 |
| 6 | Vision Solar | 32 |
| 7 | Solect Energy Development, LLC | 32 |
| 8 | Momentum Solar | 29 |
| 9 | Revision Energy | 22 |
| 10 | Tesla Energy | 16 |
Growth
Installations by year
Frequently asked questions
How many homes have solar in Middlesex County?
PanelCensus records 5,164 solar installations in Middlesex County, Massachusetts (492.9 MW of capacity) — about 0.78% of the county's 660,814 housing units (U.S. Census ACS). Dataset coverage depends on Massachusetts's reporting programs, so the true total is higher.
How much does solar cost in Middlesex County?
The median installed price for recorded systems in Middlesex County is $3.34/W pre-incentive; the median system runs 8 kW.
Who installs solar in Middlesex County?
The most active recorded installers in Middlesex County are Boston Solar, Great Sky Solar, Trinity Solar.
County assignment is derived from installation ZIP codes via the Census 2020 ZCTA↔county crosswalk (primary county by land-area overlap) — approximate at county boundaries. Market penetration = recorded installations ÷ housing units (U.S. Census Bureau ACS 5-Year, Table B25001); it undercounts where dataset coverage is partial. See methodology.