Alpine, CA 91901 solar market data
Updated April 6, 2026 By The SolarDNA Data Team
Alpine 91901 has 3,329 solar installations at a median installed cost of $4.04/W, installations down 15.3% over the trailing twelve months, and a Market Score of 46 — higher than 70% of U.S. zip markets.
Versus California
How 91901 compares with the state
Installed cost
$0.23/W below
state median $4.26/W
Market score
46 vs 53
California scores 53
Share of state installs
0.15%
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: 78–96 installs (midpoint 87)
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
91901 by year
94 installs in the trailing twelve months vs 111 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in 91901
Ranked by systems recorded in this zip
| # | Installer | Installs | 12-mo | Avg kW | $/W |
|---|---|---|---|---|---|
| 1 | SEMPER SOLARIS | 416 | 0 | 7.47 | $4.18 |
| 2 | SUNRUN | 262 | 26 | 7.07 | $4.67 |
| 3 | BAKER ELECTRIC SOLAR | 253 | 0 | 9.37 | $4.15 |
| 4 | TESLA | 150 | 1 | 7.91 | $5.12 |
| 5 | SOLARTECH ENERGY SYSTEMS | 99 | 0 | 8.48 | $3.78 |
| 6 | SULLIVAN SOLAR POWER | 98 | 0 | 8.22 | $5.10 |
| 7 | MAUZY MECHANICAL | 78 | 0 | 8.72 | $1.74 |
| 8 | STELLAR SOLAR | 67 | 2 | 8.28 | $4.29 |
| 9 | SOLAR WEST | 53 | 0 | 5.83 | $5.51 |
| 10 | GREEN AMERICA CONSTRUCTION | 49 | 0 | 8.29 | $4.04 |
| 11 | CLAYCO ELECTRIC | 48 | 0 | 9.46 | $2.67 |
| 12 | ALTERNATIVE ENERGY APPLICATIONS | 46 | 3 | 7.95 | $3.14 |
Neighboring zips
The nearest zip markets
By distance between zip centroids
| Zip | Distance | Installs | $/W | Score |
|---|---|---|---|---|
| 91935 Jamul | 14.4 km | 2,013 | $4.08 | 39 |
| 91916 Descanso | 15.0 km | 264 | $4.37 | 39 |
| 92021 El Cajon | 15.7 km | 6,149 | $4.26 | 43 |
| 92040 Lakeside | 15.8 km | 6,414 | $4.15 | 48 |
| 92019 El Cajon | 16.4 km | 5,676 | $4.09 | 50 |
| 91931 Guatay | 18.5 km | 17 | $4.44 | 38 |
Same city
Other zips in Alpine
Equipment
What gets installed in 91901
Share of systems with a recorded brand
Modules
LG ELECTRONICS19.6%
SUNPOWER17.1%
QCELLS NORTH AMERICA11.7%
SILFAB SOLAR4.9%
CSI SOLAR4.3%
Inverters
ENPHASE ENERGY37.9%
SOLAREDGE24.7%
SMA AMERICA11.8%
SUNPOWER9.7%
TESLAINC2.2%
Frequently asked
Quick answers about 91901
How many solar installations are there in 91901?
SolarDNA counts 3,329 active solar installations in Alpine 91901, 3,302 of them residential, with data through April 6, 2026.
How much does solar cost in 91901?
The median residential system in 91901 cost $4.04 per watt over the trailing twelve months, $0.23/W below the California median.
Is solar growing in 91901?
Installations in 91901 are down 15.3%: 94 in the trailing twelve months versus 111 before.
Who installs solar in 91901?
SEMPER SOLARIS, SUNRUN, BAKER ELECTRIC SOLAR lead the 353 installers with systems in 91901. The full comp set is above.
Is 91901 a good market for solar sales?
91901 scores 46 out of 100 (Great, higher than 70% of U.S. zip markets).