Watertown, MA solar installation & market data
Updated February 20, 2024Older data · growth withheldProvisional score · under 500 installs By The SolarDNA Data Team
Watertown has 416 solar installations across 2 zip codes at a median installed cost of $4.23/W, recent growth not yet measurable, and an installs-weighted Market Score of 47.
Active installations
416
Zip markets
2
Median cost
$4.23/W
12-mo growth
—
Installers active
66
City Market Score
Great · installs-weighted across 2 zips
Best zip in Watertown scores higher than 84% of U.S. zip markets.
Versus Massachusetts
How Watertown compares with the state
Installed cost
$0.06/W above
state median $4.17/W
Market score
47 vs 58
Massachusetts scores 58
Share of state installs
0.29%
of 142.6K tracked statewide
Battery attach
2.2%
state 3.1%
Statewide momentum
▲ 22.8%
residential solar added in Massachusetts, 12 months through Jul 2026
Statewide market
233.7K systems
13.3% of homes · utility-reported through Jul 2026
Growth & pricing
Watertown by year
28 installs in the trailing twelve months vs 41 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in Watertown
Summed across every zip in the city
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | SUNRUN | 68 | 6 | 1 | $4.01 |
| 2 | TESLA | 61 | 2 | 1 | $5.10 |
| 3 | SUNBUG SOLAR | 54 | 3 | 1 | $4.04 |
| 4 | NEXT STEP LIVING | 32 | 0 | 1 | $5.42 |
| 5 | TRINITY SOLAR | 27 | 0 | 1 | $4.20 |
| 6 | SUNLIGHT SOLAR ENERGY | 11 | 0 | 1 | $3.80 |
| 7 | SUNPOWER | 9 | 3 | 1 | $4.27 |
| 8 | VENTURE HOME SOLAR | 8 | 1 | 1 | $4.40 |
| 9 | BOSTON SOLAR | 8 | 1 | 1 | $3.81 |
| 10 | RAYAH SOLAR | 7 | 0 | 1 | $3.29 |
| 11 | SUNGEVITY | 7 | 0 | 1 | $4.71 |
| 12 | GREAT SKY SOLAR | 7 | 4 | 1 | $3.30 |
| 13 | ROOF DIAGNOSTICS SOLAR | 6 | 0 | 1 | $4.07 |
| 14 | KEARSARGE SOLAR | 6 | 3 | 1 | $3.42 |
| 15 | FREEDOM FOREVER | 5 | 1 | 1 | $3.96 |
| 16 | BRIGHTSTAR SOLAR | 5 | 0 | 1 | $3.78 |
| 17 | RGS ENERGY | 5 | 0 | 1 | $3.75 |
| 18 | NUWATT ENERGY | 5 | 1 | 1 | $2.84 |
| 19 | CONSERVATION SERVICES GROUP | 4 | 0 | 1 | $7.31 |
| 20 | NEW ENGLAND CLEAN ENERGY | 4 | 1 | 2 | $4.53 |
| 21 | DIRECT ENERGY SOLAR | 4 | 0 | 1 | $4.09 |
| 22 | SKYLINE SOLAR | 4 | 0 | 1 | $4.52 |
| 23 | INVALEON TECHNOLOGIES | 3 | 0 | 1 | $3.07 |
| 24 | ACE SOLAR | 3 | 0 | 1 | $2.76 |
| 25 | VIRIDIS ENERGY SOLUTIONS | 3 | 3 | 1 | $5.45 |