Waltham, MA solar installation & market data
Updated November 12, 2024Older data · growth withheld By The SolarDNA Data Team
Waltham has 990 solar installations across 4 zip codes at a median installed cost of $4.11/W, recent growth not yet measurable, and an installs-weighted Market Score of 47.
Active installations
990
Zip markets
4
Median cost
$4.11/W
12-mo growth
—
Installers active
113
City Market Score
Great · installs-weighted across 4 zips
Best zip in Waltham scores higher than 79% of U.S. zip markets.
Versus Massachusetts
How Waltham compares with the state
Installed cost
$0.06/W below
state median $4.17/W
Market score
47 vs 58
Massachusetts scores 58
Share of state installs
0.69%
of 142.6K tracked statewide
Battery attach
2.1%
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
Waltham by year
64 installs in the trailing twelve months vs 91 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in Waltham
Summed across every zip in the city
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | SUNRUN | 192 | 28 | 3 | $3.67 |
| 2 | TESLA | 172 | 5 | 3 | $5.11 |
| 3 | TRINITY SOLAR | 97 | 0 | 3 | $3.67 |
| 4 | BOSTON SOLAR | 42 | 8 | 3 | $3.98 |
| 5 | 1ST LIGHT ENERGY | 36 | 0 | 3 | $3.93 |
| 6 | NEXT STEP LIVING | 30 | 0 | 3 | $7.55 |
| 7 | ROOF DIAGNOSTICS SOLAR | 24 | 0 | 3 | $4.36 |
| 8 | SUNLIGHT SOLAR ENERGY | 22 | 0 | 3 | $3.89 |
| 9 | SUNGEVITY | 20 | 0 | 3 | $3.96 |
| 10 | DIRECT ENERGY SOLAR | 19 | 0 | 3 | $4.02 |
| 11 | REVOLUSUN | 19 | 1 | 3 | $4.02 |
| 12 | SUNBUG SOLAR | 17 | 1 | 3 | $3.96 |
| 13 | FREEDOM FOREVER | 17 | 11 | 3 | $3.81 |
| 14 | GREAT SKY SOLAR | 15 | 5 | 3 | $3.17 |
| 15 | NUWATT ENERGY | 15 | 1 | 3 | $3.06 |
| 16 | UNITED SOLAR ASSOCIATES | 10 | 0 | 3 | $3.46 |
| 17 | SUNPOWER | 10 | 3 | 2 | $4.42 |
| 18 | ENDLESS MTN SOLAR SERVICES | 9 | 0 | 3 | $4.91 |
| 19 | NEW ENGLAND CLEAN ENERGY | 9 | 0 | 3 | $4.13 |
| 20 | SKYLINE SOLAR | 8 | 0 | 3 | $5.06 |
| 21 | VENTURE HOME SOLAR | 8 | 1 | 3 | $4.43 |
| 22 | INVALEON TECHNOLOGIES | 7 | 0 | 2 | $3.10 |
| 23 | SOLARFLAIR ENERGY | 7 | 0 | 3 | $6.31 |
| 24 | AMERESCO | 7 | 0 | 3 | $3.63 |
| 25 | SOLAR FIVE | 6 | 0 | 3 | $3.84 |