Williamstown, NJ solar installation & market data
Updated June 19, 2026 By The SolarDNA Data Team
Williamstown has 2,471 solar installations across 1 zip code, installations up 78.9% over the trailing twelve months, and an installs-weighted Market Score of 71.
Active installations
2,471
Zip markets
1
Median cost
—
12-mo growth
▲ 78.9%
Installers active
12
City Market Score
Excellent · installs-weighted across 1 zips
Best zip in Williamstown scores higher than 99% of U.S. zip markets.
Versus New Jersey
How Williamstown compares with the state
Installed cost
—
state median —/W
Market score
71 vs 62
New Jersey scores 62
Share of state installs
1.01%
of 244.1K tracked statewide
Battery attach
100.0%
state 99.8%
Statewide momentum
▲ 20.1%
residential solar added in New Jersey, 12 months through Jul 2026
Statewide market
239.1K systems
10.4% of homes · utility-reported through Jul 2026
Next-12-month outlook: 133–179 installs (midpoint 156)
Trailing-12-month installs carried forward at half the observed growth rate (capped at ±30%), with a ±15% band. Not a forecast of permits or policy.
Growth & pricing
Williamstown by year
136 installs in the trailing twelve months vs 76 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in Williamstown
Summed across every zip in the city
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | SUNRUN | 348 | 4 | 1 | — |
| 2 | TRINITY SOLAR | 322 | 14 | 1 | — |
| 3 | TESLA | 139 | 0 | 1 | — |
| 4 | SUNNYMAC | 133 | 36 | 1 | — |
| 5 | CODE GREEN SOLAR | 110 | 0 | 1 | — |
| 6 | SUNTUITY | 100 | 0 | 1 | — |
| 7 | MOMENTUM SOLAR | 82 | 4 | 1 | — |
| 8 | ALL SEASON SOLAR NJ | 73 | 0 | 1 | — |
| 9 | EMT RENEWABLES | 56 | 21 | 1 | — |
| 10 | VISION SOLAR | 55 | 0 | 1 | — |
| 11 | ORBIT ENERGY | 49 | 0 | 1 | — |
| 12 | SUNGEVITY | 48 | 0 | 1 | — |
Zip markets
Zips in Williamstown
Ranked by installations · click for the zip market
| Zip | Installs | $/W | Score |
|---|---|---|---|
| 08094 | 2,471 | — | 71 A |