Union City, CA solar installation & market data
Updated April 28, 2026 By The SolarDNA Data Team
Union City has 3,106 solar installations across 1 zip code at a median installed cost of $4.34/W, installations up 19.1% over the trailing twelve months, and an installs-weighted Market Score of 53.
Active installations
3,106
Zip markets
1
Median cost
$4.34/W
12-mo growth
▲ 19.1%
Installers active
12
City Market Score
Excellent · installs-weighted across 1 zips
Best zip in Union City scores higher than 96% of U.S. zip markets.
Versus California
How Union City compares with the state
Installed cost
$0.08/W above
state median $4.26/W
Market score
53 vs 53
California scores 53
Share of state installs
0.14%
of 2.3M tracked statewide
Battery attach
11.0%
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: 203–249 installs (midpoint 226)
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
Union City by year
206 installs in the trailing twelve months vs 173 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in Union City
Summed across every zip in the city
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | TESLA | 847 | 35 | 1 | $5.12 |
| 2 | SUNRUN | 563 | 45 | 1 | $4.37 |
| 3 | SUNPOWER | 187 | 3 | 1 | $4.34 |
| 4 | BETTER EARTH | 95 | 0 | 1 | $4.87 |
| 5 | PETERSENDEAN | 67 | 0 | 1 | $3.89 |
| 6 | SEMPER SOLARIS | 59 | 4 | 1 | $4.06 |
| 7 | YOUR ENERGY SOLUTIONS | 57 | 3 | 1 | $3.66 |
| 8 | FREEDOM FOREVER | 54 | 14 | 1 | $5.31 |
| 9 | SUNGEVITY | 47 | 0 | 1 | $3.42 |
| 10 | BRIGHT OPS | 43 | 8 | 1 | $5.08 |
| 11 | HOOKED ON SOLAR | 38 | 0 | 1 | $4.33 |
| 12 | AMERICAN ARRAY SOLAR | 35 | 0 | 1 | $3.50 |
Zip markets
Zips in Union City
Ranked by installations · click for the zip market
| Zip | Installs | $/W | Score |
|---|---|---|---|
| 94587 | 3,106 | $4.34 | 53 A |