San Marino, CA 91108 solar market data
Updated April 15, 2026 By The SolarDNA Data Team
San Marino 91108 has 584 solar installations at a median installed cost of $4.43/W, installations up 4.1% over the trailing twelve months, and a Market Score of 42 — higher than 46% of U.S. zip markets.
Versus California
How 91108 compares with the state
Installed cost
$0.16/W above
state median $4.26/W
Market score
42 vs 53
California scores 53
Share of state installs
0.03%
of 2.3M tracked statewide
Battery attach
24.7%
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: 47–57 installs (midpoint 52)
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
91108 by year
51 installs in the trailing twelve months vs 49 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in 91108
Ranked by systems recorded in this zip
| # | Installer | Installs | 12-mo | Avg kW | $/W |
|---|---|---|---|---|---|
| 1 | TESLA | 42 | 1 | 8.68 | $4.90 |
| 2 | SOLAR OPTIMUM DESIGN ELECTRIC | 31 | 0 | 9.52 | $2.97 |
| 3 | SUNPOWER | 30 | 0 | 8.63 | $5.54 |
| 4 | SUNRUN | 21 | 4 | 10.04 | $4.24 |
| 5 | BURKE ELECTRIC | 15 | 0 | 7.37 | $4.80 |
| 6 | LA SOLAR GROUP | 14 | 0 | 9.65 | $3.72 |
| 7 | SOLARMAX | 14 | 0 | 7.74 | $3.29 |
| 8 | GREEN CONVERGENCE | 13 | 0 | 7.58 | $5.36 |
| 9 | SOLAR VAST | 13 | 0 | 7.85 | $3.86 |
| 10 | ALTADENA SOLAR | 12 | 0 | 10.26 | $4.36 |
| 11 | TRUE POWER SOLAR | 12 | 0 | 8.69 | $3.57 |
| 12 | PHAT ENERGY | 8 | 0 | 7.09 | $5.09 |
Equipment
What gets installed in 91108
Share of systems with a recorded brand
Modules
SUNPOWER19.1%
REC GROUP11.1%
QCELLS NORTH AMERICA10.7%
LG ELECTRONICS9.0%
CSI SOLAR4.4%
Inverters
ENPHASE ENERGY43.9%
SUNPOWER15.0%
SOLAREDGE14.3%
SMA AMERICA8.6%
TESLA3.8%
Frequently asked
Quick answers about 91108
How many solar installations are there in 91108?
SolarDNA counts 584 active solar installations in San Marino 91108, 578 of them residential, with data through April 15, 2026.
How much does solar cost in 91108?
The median residential system in 91108 cost $4.43 per watt over the trailing twelve months, $0.16/W above the California median.
Is solar growing in 91108?
Installations in 91108 are up 4.1%: 51 in the trailing twelve months versus 49 before.
Who installs solar in 91108?
TESLA, SOLAR OPTIMUM DESIGN ELECTRIC, SUNPOWER lead the 204 installers with systems in 91108. The full comp set is above.
Is 91108 a good market for solar sales?
91108 scores 42 out of 100 (Good, higher than 46% of U.S. zip markets).