Napa, CA 94559 solar market data
Updated April 15, 2026 By The SolarDNA Data Team
Napa 94559 has 1,511 solar installations at a median installed cost of $4.57/W, installations up 8.3% over the trailing twelve months, and a Market Score of 47 — higher than 74% of U.S. zip markets.
Versus California
How 94559 compares with the state
Installed cost
$0.30/W above
state median $4.26/W
Market score
47 vs 53
California scores 53
Share of state installs
0.07%
of 2.3M tracked statewide
Battery attach
14.0%
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: 111–135 installs (midpoint 123)
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
94559 by year
118 installs in the trailing twelve months vs 109 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in 94559
Ranked by systems recorded in this zip
| # | Installer | Installs | 12-mo | Avg kW | $/W |
|---|---|---|---|---|---|
| 1 | TESLA | 176 | 1 | 6.75 | $4.97 |
| 2 | SUNRUN | 149 | 13 | 7.5 | $4.21 |
| 3 | GREEN STOCK SOLAR | 81 | 7 | 6.31 | $3.76 |
| 4 | CITADEL ROOFING AND SOLAR | 66 | 8 | 5.11 | $3.23 |
| 5 | AMBROSE SOLAR | 50 | 4 | 11.14 | $4.64 |
| 6 | BRIGHT OPS | 45 | 22 | 6.16 | $4.91 |
| 7 | SUNPOWER | 40 | 0 | 6.29 | $4.56 |
| 8 | FREEDOM FOREVER | 31 | 1 | 6.59 | $5.02 |
| 9 | V3 ELECTRIC | 31 | 1 | 4.8 | $6.32 |
| 10 | BETTER EARTH | 31 | 0 | 6.07 | $5.12 |
| 11 | EMPOWER ELECTRIC | 27 | 0 | 5.62 | $5.02 |
| 12 | SOLARCRAFT SERVICES | 27 | 0 | 31.76 | $5.83 |
Neighboring zips
The nearest zip markets
By distance between zip centroids
| Zip | Distance | Installs | $/W | Score |
|---|---|---|---|---|
| 94503 American Canyon | 14.0 km | 1,946 | $4.34 | 45 |
| 94599 Yountville | 14.1 km | 154 | $4.40 | 38 |
| 94534 Fairfield | 14.4 km | 4,270 | $4.43 | 49 |
| 94589 Vallejo | 14.7 km | 1,463 | $5.10 | 41 |
| 95476 Sonoma | 16.2 km | 3,273 | $4.73 | 47 |
| 94558 Napa | 18.5 km | 5,657 | $4.53 | 55 |
Same city
Other zips in Napa
Equipment
What gets installed in 94559
Share of systems with a recorded brand
Modules
QCELLS NORTH AMERICA16.4%
SUNPOWER11.4%
CSI SOLAR8.3%
LONGI GREEN ENERGY TECHNOLOGY7.6%
REC GROUP7.6%
Inverters
ENPHASE ENERGY41.0%
SOLAREDGE26.7%
TESLA6.5%
SMA AMERICA5.3%
SUNPOWER4.5%
Frequently asked
Quick answers about 94559
How many solar installations are there in 94559?
SolarDNA counts 1,511 active solar installations in Napa 94559, 1,407 of them residential, with data through April 15, 2026.
How much does solar cost in 94559?
The median residential system in 94559 cost $4.57 per watt over the trailing twelve months, $0.30/W above the California median.
Is solar growing in 94559?
Installations in 94559 are up 8.3%: 118 in the trailing twelve months versus 109 before.
Who installs solar in 94559?
TESLA, SUNRUN, GREEN STOCK SOLAR lead the 248 installers with systems in 94559. The full comp set is above.
Is 94559 a good market for solar sales?
94559 scores 47 out of 100 (Great, higher than 74% of U.S. zip markets).