Petaluma, CA solar installation & market data
Updated April 24, 2026 By The SolarDNA Data Team
Petaluma has 5,486 solar installations across 4 zip codes at a median installed cost of $4.43/W, installations down 15.0% over the trailing twelve months, and an installs-weighted Market Score of 44.
Active installations
5,486
Zip markets
4
Median cost
$4.43/W
12-mo growth
▼ 15.0%
Installers active
406
City Market Score
Good · installs-weighted across 4 zips
Best zip in Petaluma scores higher than 63% of U.S. zip markets.
Versus California
How Petaluma compares with the state
Installed cost
$0.16/W above
state median $4.26/W
Market score
44 vs 53
California scores 53
Share of state installs
0.24%
of 2.3M tracked statewide
Battery attach
11.7%
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: 260–318 installs (midpoint 289)
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
Petaluma by year
312 installs in the trailing twelve months vs 367 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in Petaluma
Summed across every zip in the city
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | SUNRUN | 786 | 63 | 2 | $4.67 |
| 2 | TESLA | 475 | 8 | 2 | $5.11 |
| 3 | SUNPOWER | 416 | 2 | 2 | $4.25 |
| 4 | ROCKIN ROOFERS | 233 | 8 | 2 | $4.28 |
| 5 | NORTHERN PACIFIC POWER | 182 | 0 | 2 | $4.08 |
| 6 | PETERSENDEAN | 163 | 0 | 2 | $3.88 |
| 7 | FREEDOM FOREVER | 144 | 5 | 2 | $5.38 |
| 8 | BRIGHT OPS | 143 | 32 | 2 | $4.93 |
| 9 | SOLARCRAFT SERVICES | 132 | 7 | 2 | $4.81 |
| 10 | CITADEL ROOFING AND SOLAR | 114 | 7 | 2 | $3.44 |
| 11 | J J ELECTRIC | 98 | 0 | 2 | $3.71 |
| 12 | BETTER EARTH | 87 | 0 | 2 | $5.16 |
| 13 | SUNTEGRITY SOLAR | 79 | 3 | 2 | $4.27 |
| 14 | HIGH DEFINITION SOLAR | 76 | 0 | 2 | $7.61 |
| 15 | NORCAL CONTRACTING | 67 | 0 | 2 | $3.96 |
| 16 | A1 SOLAR POWER | 62 | 0 | 2 | $6.74 |
| 17 | ADVANCED ALTERNATIVE ENERGY SOLUTIONS | 54 | 0 | 2 | $7.44 |
| 18 | SOLAR WORKS | 54 | 1 | 2 | $5.86 |
| 19 | SUNGEVITY | 53 | 0 | 2 | $4.20 |
| 20 | SEMPER SOLARIS | 51 | 2 | 2 | $4.53 |
| 21 | SUN FIRST | 50 | 0 | 2 | $4.95 |
| 22 | RGS ENERGY | 49 | 0 | 2 | $6.34 |
| 23 | AMYS CONSTRUCTION | 41 | 0 | 2 | $4.42 |
| 24 | SPG SOLAR | 37 | 0 | 3 | $7.63 |
| 25 | WESTCOAST SOLAR ENERGY | 36 | 0 | 2 | $4.16 |