Cotati, CA 94931 solar market data
Updated April 17, 2026 By The SolarDNA Data Team
Cotati 94931 has 545 solar installations at a median installed cost of $4.64/W, recent growth not yet measurable, and a Market Score of 39 — higher than 32% of U.S. zip markets.
Versus California
How 94931 compares with the state
Installed cost
$0.38/W above
state median $4.26/W
Market score
39 vs 53
California scores 53
Share of state installs
0.02%
of 2.3M tracked statewide
Battery attach
13.4%
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
Growth & pricing
94931 by year
38 installs in the trailing twelve months vs 32 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in 94931
Ranked by systems recorded in this zip
| # | Installer | Installs | 12-mo | Avg kW | $/W |
|---|---|---|---|---|---|
| 1 | SUNRUN | 134 | 13 | 9.03 | $4.64 |
| 2 | TESLA | 53 | 0 | 9.97 | $5.12 |
| 3 | NORTHERN PACIFIC POWER | 18 | 0 | 6.87 | $4.00 |
| 4 | WESTCOAST SOLAR ENERGY | 15 | 0 | 6.95 | $5.70 |
| 5 | ROCKIN ROOFERS | 14 | 0 | 5.33 | $4.52 |
| 6 | FREEDOM FOREVER | 12 | 1 | 7.63 | $5.51 |
| 7 | CITADEL ROOFING AND SOLAR | 11 | 1 | 5.85 | $2.85 |
| 8 | SOLARCRAFT SERVICES | 10 | 0 | 5.2 | $5.21 |
| 9 | BRIGHT OPS | 9 | 6 | 5.7 | $4.75 |
| 10 | BETTER EARTH | 9 | 0 | 7.28 | $3.64 |
| 11 | SUNPOWER | 9 | 0 | 6.46 | $5.35 |
| 12 | SYNERGY SOLAR | 8 | 0 | 6.02 | $4.14 |
Equipment
What gets installed in 94931
Share of systems with a recorded brand
Modules
JA SOLAR9.9%
JINKO SOLAR9.9%
QCELLS NORTH AMERICA9.7%
REC GROUP6.8%
LONGI GREEN ENERGY TECHNOLOGY6.2%
Inverters
SOLAREDGE34.2%
ENPHASE ENERGY32.4%
SMA AMERICA8.2%
TESLA6.6%
FRONIUS USA2.9%
Frequently asked
Quick answers about 94931
How many solar installations are there in 94931?
SolarDNA counts 545 active solar installations in Cotati 94931, 521 of them residential, with data through April 17, 2026.
How much does solar cost in 94931?
The median residential system in 94931 cost $4.64 per watt over the trailing twelve months, $0.38/W above the California median.
Is solar growing in 94931?
Recent growth cannot be measured yet for 94931: too few recent installs (data runs through April 17, 2026).
Who installs solar in 94931?
SUNRUN, TESLA, NORTHERN PACIFIC POWER lead the 126 installers with systems in 94931. The full comp set is above.
Is 94931 a good market for solar sales?
94931 scores 39 out of 100 (Good, higher than 32% of U.S. zip markets).