Napa, CA solar installation & market data
Updated April 21, 2026 By The SolarDNA Data Team
Napa has 7,169 solar installations across 3 zip codes at a median installed cost of $4.54/W, installations up 25.1% over the trailing twelve months, and an installs-weighted Market Score of 53.
Active installations
7,169
Zip markets
3
Median cost
$4.54/W
12-mo growth
▲ 25.1%
Installers active
532
City Market Score
Excellent · installs-weighted across 3 zips
Best zip in Napa scores higher than 97% of U.S. zip markets.
Versus California
How Napa compares with the state
Installed cost
$0.28/W above
state median $4.26/W
Market score
53 vs 53
California scores 53
Share of state installs
0.32%
of 2.3M tracked statewide
Battery attach
14.3%
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: 560–720 installs (midpoint 640)
Trailing-12-month installs carried forward at half the observed growth rate (capped at ±30%), with a ±13% band. Not a forecast of permits or policy.
Growth & pricing
Napa by year
569 installs in the trailing twelve months vs 455 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in Napa
Summed across every zip in the city
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | SUNRUN | 995 | 126 | 2 | $4.34 |
| 2 | TESLA | 760 | 26 | 2 | $5.09 |
| 3 | GREEN STOCK SOLAR | 414 | 26 | 2 | $3.67 |
| 4 | CITADEL ROOFING AND SOLAR | 229 | 49 | 2 | $3.02 |
| 5 | AMBROSE SOLAR | 213 | 25 | 2 | $4.54 |
| 6 | SUNPOWER | 166 | 1 | 2 | $4.74 |
| 7 | V3 ELECTRIC | 145 | 11 | 2 | $5.22 |
| 8 | SEMPER SOLARIS | 138 | 9 | 2 | $4.60 |
| 9 | HIGH DEFINITION SOLAR | 138 | 0 | 2 | $6.97 |
| 10 | BRIGHT OPS | 135 | 61 | 2 | $5.23 |
| 11 | FREEDOM FOREVER | 112 | 8 | 2 | $4.75 |
| 12 | NORTHERN PACIFIC POWER | 108 | 0 | 2 | $4.18 |
| 13 | HOOKED ON SOLAR | 104 | 5 | 2 | $4.33 |
| 14 | SOLARCRAFT SERVICES | 100 | 5 | 2 | $5.59 |
| 15 | PETERSENDEAN | 96 | 0 | 2 | $3.78 |
| 16 | RGS ENERGY | 87 | 0 | 2 | $6.86 |
| 17 | NAPA ELECTRIC SHOP | 85 | 3 | 2 | $4.02 |
| 18 | EMPOWER ELECTRIC | 82 | 0 | 2 | $4.97 |
| 19 | BETTER EARTH | 81 | 0 | 2 | $5.24 |
| 20 | SUNTEGRITY SOLAR | 76 | 4 | 2 | $4.25 |
| 21 | A1 SOLAR POWER | 73 | 0 | 2 | $6.35 |
| 22 | ROCKIN ROOFERS | 67 | 7 | 2 | $4.61 |
| 23 | GOLD RUSH ENERGY SOLUTIONS | 62 | 0 | 2 | $4.15 |
| 24 | GREG GAYLER CONSTRUCTION | 58 | 0 | 2 | $3.60 |
| 25 | SUN FIRST | 56 | 0 | 2 | $5.05 |