Saint Helena, CA solar installation & market data
Updated April 8, 2026 By The SolarDNA Data Team
Saint Helena has 921 solar installations across 1 zip code at a median installed cost of $4.88/W, installations up 12.5% over the trailing twelve months, and an installs-weighted Market Score of 43.
Active installations
921
Zip markets
1
Median cost
$4.88/W
12-mo growth
▲ 12.5%
Installers active
12
City Market Score
Good · installs-weighted across 1 zips
Best zip in Saint Helena scores higher than 57% of U.S. zip markets.
Versus California
How Saint Helena compares with the state
Installed cost
$0.61/W above
state median $4.26/W
Market score
43 vs 53
California scores 53
Share of state installs
0.04%
of 2.3M tracked statewide
Battery attach
14.1%
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: 60–74 installs (midpoint 67)
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
Saint Helena by year
63 installs in the trailing twelve months vs 56 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in Saint Helena
Summed across every zip in the city
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | TESLA | 114 | 5 | 1 | $5.12 |
| 2 | SUNRUN | 64 | 25 | 1 | $4.48 |
| 3 | SOLARCRAFT SERVICES | 41 | 0 | 1 | $6.18 |
| 4 | GREEN STOCK SOLAR | 28 | 2 | 1 | $3.65 |
| 5 | RGS ENERGY | 26 | 0 | 1 | $5.85 |
| 6 | NORTHERN PACIFIC POWER | 25 | 0 | 1 | $4.02 |
| 7 | CITADEL ROOFING AND SOLAR | 23 | 0 | 1 | $3.60 |
| 8 | SUMMIT ELECTRIC | 23 | 0 | 1 | $3.73 |
| 9 | SOLARCRAFT | 21 | 0 | 1 | $4.13 |
| 10 | SPG SOLAR | 21 | 0 | 1 | $7.52 |
| 11 | PURE POWER SOLUTIONS | 18 | 1 | 1 | $3.82 |
| 12 | DIABLO SOLAR SERVICES | 18 | 0 | 1 | $4.44 |
Zip markets
Zips in Saint Helena
Ranked by installations · click for the zip market
| Zip | Installs | $/W | Score |
|---|---|---|---|
| 94574 | 921 | $4.88 | 43 C |