Los Altos, CA solar installation & market data
Updated April 30, 2026 By The SolarDNA Data Team
Los Altos has 5,548 solar installations across 3 zip codes at a median installed cost of $4.70/W, installations down 6.9% over the trailing twelve months, and an installs-weighted Market Score of 45.
Active installations
5,548
Zip markets
3
Median cost
$4.70/W
12-mo growth
▼ 6.9%
Installers active
451
City Market Score
Good · installs-weighted across 3 zips
Best zip in Los Altos scores higher than 79% of U.S. zip markets.
Versus California
How Los Altos compares with the state
Installed cost
$0.44/W above
state median $4.26/W
Market score
45 vs 53
California scores 53
Share of state installs
0.25%
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
Next-12-month outlook: 306–374 installs (midpoint 340)
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
Los Altos by year
352 installs in the trailing twelve months vs 378 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in Los Altos
Summed across every zip in the city
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | TESLA | 950 | 41 | 2 | $5.04 |
| 2 | COBALT POWER SYSTEMS | 836 | 50 | 2 | $5.58 |
| 3 | CLEAN SOLAR | 239 | 11 | 2 | $4.33 |
| 4 | SUNRUN | 234 | 26 | 2 | $4.08 |
| 5 | SUNPOWER | 222 | 3 | 2 | $4.46 |
| 6 | SLINGSHOT POWER | 108 | 0 | 2 | $4.14 |
| 7 | RGS ENERGY | 106 | 0 | 2 | $7.89 |
| 8 | SOLAR TECHNOLOGIES | 98 | 4 | 2 | $4.65 |
| 9 | CINNAMON SOLAR | 90 | 0 | 2 | $4.93 |
| 10 | AKEENA SOLAR | 85 | 0 | 2 | $7.99 |
| 11 | INFINIUM SOLAR | 85 | 16 | 2 | $3.92 |
| 12 | PETERSENDEAN | 72 | 0 | 2 | $4.23 |
| 13 | YOUR ENERGY SOLUTIONS | 70 | 6 | 2 | $3.73 |
| 14 | SEMPER SOLARIS | 70 | 4 | 2 | $4.28 |
| 15 | POCO SOLAR ENERGY | 65 | 3 | 2 | $5.51 |
| 16 | HIGHLIGHT SOLAR | 63 | 0 | 2 | $3.57 |
| 17 | SUNWORK RENEWABLE ENERGY | 55 | 0 | 2 | $2.70 |
| 18 | SOLAR OPTIMUM DESIGN ELECTRIC | 54 | 0 | 2 | $2.92 |
| 19 | NRG CLEAN ENERGY | 53 | 0 | 2 | $3.25 |
| 20 | ROCKIN ROOFERS | 51 | 11 | 2 | $4.39 |
| 21 | REC SOLAR COMMERCIAL | 50 | 0 | 2 | $5.32 |
| 22 | SUNGEVITY | 45 | 0 | 2 | $3.66 |
| 23 | FREEDOM GREEN CONSTRUCTION | 44 | 3 | 2 | $4.13 |
| 24 | HORIZON ENERGY SYSTEMS | 39 | 0 | 2 | $7.90 |
| 25 | SUNPOWER BY PROVOLTZ | 38 | 0 | 2 | $5.36 |