Westminster, CA solar installation & market data
Updated April 29, 2026 By The SolarDNA Data Team
Westminster has 3,077 solar installations across 2 zip codes at a median installed cost of $3.92/W, installations up 20.4% over the trailing twelve months, and an installs-weighted Market Score of 55.
Active installations
3,077
Zip markets
2
Median cost
$3.92/W
12-mo growth
▲ 20.4%
Installers active
383
City Market Score
Excellent · installs-weighted across 2 zips
Best zip in Westminster scores higher than 98% of U.S. zip markets.
Versus California
How Westminster compares with the state
Installed cost
$0.35/W below
state median $4.26/W
Market score
55 vs 53
California scores 53
Share of state installs
0.14%
of 2.3M tracked statewide
Battery attach
15.0%
state 12.7%
Statewide momentum
▲ 1.1%
residential solar added in California, 12 months through Jul 2026
Statewide market
2.3M systems
30.9% of homes · utility-reported through Jul 2026
Next-12-month outlook: 269–331 installs (midpoint 300)
Trailing-12-month installs carried forward at half the observed growth rate (capped at ±30%), with a ±10% band. Not a forecast of permits or policy.
Growth & pricing
Westminster by year
272 installs in the trailing twelve months vs 226 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in Westminster
Summed across every zip in the city
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | SUNRUN | 501 | 74 | 1 | $4.37 |
| 2 | TESLA | 395 | 17 | 1 | $5.12 |
| 3 | SWSS ELECTRIC | 375 | 30 | 2 | $3.04 |
| 4 | ECOSOLAR USA | 94 | 0 | 1 | $3.91 |
| 5 | SOLAR TIME ELECTRIC SERVICES | 71 | 0 | 1 | $3.50 |
| 6 | FREEDOM FOREVER | 60 | 4 | 1 | $4.04 |
| 7 | VERENGO | 49 | 0 | 1 | $4.85 |
| 8 | BRIGHT OPS | 42 | 9 | 1 | $4.46 |
| 9 | SUNPOWER | 41 | 0 | 1 | $4.69 |
| 10 | SEMPER SOLARIS | 32 | 1 | 1 | $4.04 |
| 11 | SOLARMAX | 31 | 0 | 1 | $3.29 |
| 12 | ORANGE COUNTY CONTRACTING SERVICES | 30 | 7 | 1 | $3.82 |
| 13 | SOLAR SOLUTIONS 4 U | 28 | 0 | 1 | $3.80 |
| 14 | PETERSENDEAN | 27 | 0 | 1 | $4.11 |
| 15 | BRIGHT LIFE SOLAR | 27 | 0 | 1 | $1.04 |
| 16 | SUNGEVITY | 25 | 0 | 1 | $3.79 |
| 17 | ECOSOLAR USA ELECTRIC | 24 | 17 | 1 | $4.12 |
| 18 | COMPLETE SOLAR | 23 | 0 | 1 | $4.26 |
| 19 | AMERICAN SOLAR DIRECT | 21 | 0 | 1 | $6.40 |
| 20 | POWUR | 20 | 0 | 1 | $3.72 |
| 21 | SOLAR OPTIMUM DESIGN ELECTRIC | 19 | 0 | 1 | $2.80 |
| 22 | ALTAIR SOLAR | 19 | 0 | 1 | $2.89 |
| 23 | SOLAR360 BUILDING SERVICES | 18 | 0 | 1 | $3.29 |
| 24 | PLANET EARTH SOLAR | 18 | 0 | 1 | — |
| 25 | SOLARTIME | 18 | 0 | 1 | $3.77 |