Williamstown, PA solar installation & market data
Updated June 29, 2026Provisional score · under 500 installs By The SolarDNA Data Team
Williamstown has 29 solar installations across 1 zip code at a median installed cost of $7.10/W, recent growth not yet measurable, and an installs-weighted Market Score of 32.
Active installations
29
Zip markets
1
Median cost
$7.10/W
12-mo growth
—
Installers active
1
City Market Score
Weak · installs-weighted across 1 zips
Best zip in Williamstown scores higher than 8% of U.S. zip markets.
Versus Pennsylvania
How Williamstown compares with the state
Installed cost
$1.11/W above
state median $5.99/W
Market score
32 vs 50
Pennsylvania scores 50
Share of state installs
0.03%
of 88.5K tracked statewide
Battery attach
0.0%
state 0.0%
Statewide momentum
▲ 48.7%
residential solar added in Pennsylvania, 12 months through Jul 2026
Statewide market
105.3K systems
2.8% of homes · utility-reported through Jul 2026
Growth & pricing
Williamstown by year
12 installs in the trailing twelve months vs 4 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 | EARTHSPONSE | 1 | 0 | 1 | $7.10 |
Zip markets
Zips in Williamstown
Ranked by installations · click for the zip market
| Zip | Installs | $/W | Score |
|---|---|---|---|
| 17098 | 29 | $7.10 | 32 F |