San Diego, CA 92121 solar market data
Updated April 29, 2026 By The SolarDNA Data Team
San Diego 92121 has 616 solar installations at a median installed cost of $3.66/W, recent growth not yet measurable, and a Market Score of 44 — higher than 65% of U.S. zip markets.
Versus California
How 92121 compares with the state
Installed cost
$0.61/W below
state median $4.26/W
Market score
44 vs 53
California scores 53
Share of state installs
0.03%
of 2.3M tracked statewide
Battery attach
6.3%
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
92121 by year
39 installs in the trailing twelve months vs 21 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in 92121
Ranked by systems recorded in this zip
| # | Installer | Installs | 12-mo | Avg kW | $/W |
|---|---|---|---|---|---|
| 1 | TESLA | 74 | 1 | 6.98 | $4.25 |
| 2 | BAKER ELECTRIC SOLAR | 64 | 0 | 65.97 | $4.29 |
| 3 | SUNRUN | 31 | 1 | 46.67 | $3.98 |
| 4 | SULLIVAN SOLAR POWER | 28 | 0 | 18.34 | $3.75 |
| 5 | SUNLINE ENERGY | 20 | 1 | 10.4 | $3.38 |
| 6 | STELLAR SOLAR | 19 | 1 | 9.5 | $3.89 |
| 7 | HOME ENERGY SYSTEMS | 15 | 10 | 152.43 | $2.82 |
| 8 | SEMPER SOLARIS | 13 | 0 | 5.96 | $3.90 |
| 9 | SOLARTECH ENERGY SYSTEMS | 11 | 0 | 28.21 | $3.21 |
| 10 | STEM | 11 | 0 | — | — |
| 11 | UNIQUE SOLAR | 10 | 2 | 11.62 | $2.28 |
| 12 | CURRENT SOLAR CONTRACTING | 10 | 0 | 369.67 | $2.28 |
Equipment
What gets installed in 92121
Share of systems with a recorded brand
Modules
LG ELECTRONICS16.1%
QCELLS NORTH AMERICA13.1%
SUNPOWER10.0%
SANYO ELECTRIC OF PANASONIC GROUP5.4%
KYOCERA SOLAR4.7%
Inverters
ENPHASE ENERGY24.0%
SOLAREDGE23.7%
SMA AMERICA18.1%
TESLA5.1%
SUNPOWER3.8%
Frequently asked
Quick answers about 92121
How many solar installations are there in 92121?
SolarDNA counts 616 active solar installations in San Diego 92121, 410 of them residential, with data through April 29, 2026.
How much does solar cost in 92121?
The median residential system in 92121 cost $3.66 per watt over the trailing twelve months, $0.61/W below the California median.
Is solar growing in 92121?
Recent growth cannot be measured yet for 92121: too few recent installs (data runs through April 29, 2026).
Who installs solar in 92121?
TESLA, BAKER ELECTRIC SOLAR, SUNRUN lead the 148 installers with systems in 92121. The full comp set is above.
Is 92121 a good market for solar sales?
92121 scores 44 out of 100 (Good, higher than 65% of U.S. zip markets).