Williamson County, TX solar installation & market data
Updated December 16, 2024Older data · growth withheldProvisional score · under 500 installs By The SolarDNA Data Team
Williamson County has 313 solar installations across 11 zip codes at a median installed cost of $3.72/W, recent growth not yet measurable, and an installs-weighted Market Score of 40.
Active installations
313
Zip markets
11
Median cost
$3.72/W
12-mo growth
—
Installers active
56
County Market Score
Good · installs-weighted across 11 zips
Best zip in Williamson County scores higher than 74% of U.S. zip markets.
Versus Texas
How Williamson County compares with the state
Installed cost
$0.18/W below
state median $3.90/W
Market score
40 vs 42
Texas scores 42
Share of state installs
0.14%
of 224.8K tracked statewide
Battery attach
7.0%
state 1.0%
Statewide momentum
▼ 23.4%
residential solar added in Texas, 12 months through Jul 2026
Statewide market
231.6K systems
3.4% of homes · utility-reported through Jul 2026
Growth & pricing
Williamson County by year
44 installs in the trailing twelve months vs 32 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in Williamson County
Summed across every zip in the county
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | FREEDOM SOLAR POWER TX | 61 | 5 | 2 | $3.84 |
| 2 | LIGHTHOUSE SOLAR | 27 | 2 | 3 | $3.08 |
| 3 | LONGHORN SOLAR | 22 | 0 | 5 | $3.48 |
| 4 | GREENBELT SOLAR | 20 | 0 | 2 | $2.44 |
| 5 | TESLA | 13 | 0 | 3 | $2.94 |
| 6 | 512 SOLAR | 12 | 2 | 2 | $2.85 |
| 7 | WELLS SOLAR | 8 | 0 | 1 | $3.60 |
| 8 | SOLAR COMMUNITY | 8 | 0 | 3 | $6.22 |
| 9 | ION SOLAR | 8 | 0 | 2 | $4.38 |
| 10 | AXIS SOLAR | 7 | 7 | 1 | $1.77 |
| 11 | HESOLAR | 6 | 0 | 2 | $3.15 |
| 12 | TEXAS SOLAR POWER | 6 | 0 | 2 | $5.99 |
| 13 | REVOLVE SOLAR | 6 | 0 | 2 | $3.58 |
| 14 | AUSTIN ENERGY | 4 | 0 | 1 | $6.47 |
| 15 | JANETS ELECTRIC | 4 | 0 | 1 | $6.96 |
| 16 | NATIVE | 4 | 0 | 1 | $3.15 |
| 17 | MERIDIAN SOLAR | 4 | 0 | 1 | $2.65 |
| 18 | FREEDOM FOREVER | 4 | 0 | 1 | $3.38 |
| 19 | TITAN SOLAR | 3 | 1 | 1 | $4.73 |
| 20 | TEXAS QUALITY SOLAR | 3 | 0 | 1 | $3.08 |
| 21 | NRG CLEAN ENERGY | 3 | 0 | 1 | $2.98 |
| 22 | CIRCULAR ENERGY | 3 | 0 | 3 | $4.04 |
| 23 | AAPEX HOME ENERGY MANAGEMENT | 3 | 0 | 1 | $3.90 |
| 24 | DKD ENERGY | 3 | 0 | 2 | $3.03 |
| 25 | GREENSTAR POWER | 3 | 0 | 2 | $3.17 |