Saint Helena, CA 94574 solar market data
Updated April 8, 2026 By The SolarDNA Data Team
Saint Helena 94574 has 921 solar installations at a median installed cost of $4.88/W, installations up 12.5% over the trailing twelve months, and a Market Score of 43 — higher than 57% of U.S. zip markets.
Versus California
How 94574 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
94574 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 94574
Ranked by systems recorded in this zip
| # | Installer | Installs | 12-mo | Avg kW | $/W |
|---|---|---|---|---|---|
| 1 | TESLA | 114 | 5 | 9.82 | $5.12 |
| 2 | SUNRUN | 64 | 25 | 9.99 | $4.48 |
| 3 | SOLARCRAFT SERVICES | 41 | 0 | 18.75 | $6.18 |
| 4 | GREEN STOCK SOLAR | 28 | 2 | 7.88 | $3.65 |
| 5 | RGS ENERGY | 26 | 0 | 8.27 | $5.85 |
| 6 | NORTHERN PACIFIC POWER | 25 | 0 | 17.74 | $4.02 |
| 7 | CITADEL ROOFING AND SOLAR | 23 | 0 | 8.85 | $3.60 |
| 8 | SUMMIT ELECTRIC | 23 | 0 | 37.25 | $3.73 |
| 9 | SOLARCRAFT | 21 | 0 | 32.92 | $4.13 |
| 10 | SPG SOLAR | 21 | 0 | 17.96 | $7.52 |
| 11 | PURE POWER SOLUTIONS | 18 | 1 | 10.94 | $3.82 |
| 12 | DIABLO SOLAR SERVICES | 18 | 0 | 9.13 | $4.44 |
Equipment
What gets installed in 94574
Share of systems with a recorded brand
Modules
SUNPOWER13.1%
LG ELECTRONICS9.3%
QCELLS NORTH AMERICA8.3%
TESLA5.5%
SHARP5.4%
Inverters
ENPHASE ENERGY31.7%
SOLAREDGE19.5%
SMA AMERICA13.9%
SUNPOWER7.3%
FRONIUS USA6.6%
Frequently asked
Quick answers about 94574
How many solar installations are there in 94574?
SolarDNA counts 921 active solar installations in Saint Helena 94574, 700 of them residential, with data through April 8, 2026.
How much does solar cost in 94574?
The median residential system in 94574 cost $4.88 per watt over the trailing twelve months, $0.61/W above the California median.
Is solar growing in 94574?
Installations in 94574 are up 12.5%: 63 in the trailing twelve months versus 56 before.
Who installs solar in 94574?
TESLA, SUNRUN, SOLARCRAFT SERVICES lead the 186 installers with systems in 94574. The full comp set is above.
Is 94574 a good market for solar sales?
94574 scores 43 out of 100 (Good, higher than 57% of U.S. zip markets).