Exeter, CA 93221 solar market data
Updated April 23, 2026 By The SolarDNA Data Team
Exeter 93221 has 1,554 solar installations at a median installed cost of $4.19/W, installations down 3.6% over the trailing twelve months, and a Market Score of 46 — higher than 70% of U.S. zip markets.
Versus California
How 93221 compares with the state
Installed cost
$0.07/W below
state median $4.26/W
Market score
46 vs 53
California scores 53
Share of state installs
0.07%
of 2.3M tracked statewide
Battery attach
17.3%
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
Next-12-month outlook: 117–143 installs (midpoint 130)
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
93221 by year
132 installs in the trailing twelve months vs 137 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in 93221
Ranked by systems recorded in this zip
| # | Installer | Installs | 12-mo | Avg kW | $/W |
|---|---|---|---|---|---|
| 1 | SUNRUN | 357 | 38 | 10.74 | $4.19 |
| 2 | TESLA | 114 | 1 | 8.45 | $5.12 |
| 3 | J P ELECTRIC SERVICE | 64 | 0 | 10.17 | $4.31 |
| 4 | TYLER JIM CONSTRUCTION AND SOLAR | 63 | 0 | 9.09 | $3.51 |
| 5 | BRIGHT OPS | 60 | 5 | 7.16 | $4.58 |
| 6 | FREEDOM FOREVER | 50 | 6 | 9.18 | $3.97 |
| 7 | SOLAR NEGOTIATORS | 35 | 5 | 11.43 | $3.77 |
| 8 | AIR SUN | 32 | 3 | 7.98 | $4.04 |
| 9 | SOLGEN CONSTRUCTION | 30 | 0 | 8.5 | $5.51 |
| 10 | ABUNDANT ENERGY CONSTRUCTION | 28 | 0 | 8.79 | $5.46 |
| 11 | ALTSYS SOLAR | 24 | 1 | 17.67 | $3.48 |
| 12 | QUALITY HOME SERVICES | 21 | 1 | 10.05 | $4.30 |
Equipment
What gets installed in 93221
Share of systems with a recorded brand
Modules
QCELLS NORTH AMERICA18.9%
SUNPOWER10.9%
LONGI GREEN ENERGY TECHNOLOGY10.6%
CSI SOLAR6.4%
JA SOLAR6.0%
Inverters
SOLAREDGE32.8%
ENPHASE ENERGY30.2%
SUNPOWER8.5%
SMA AMERICA7.7%
ABB4.2%
Frequently asked
Quick answers about 93221
How many solar installations are there in 93221?
SolarDNA counts 1,554 active solar installations in Exeter 93221, 1,510 of them residential, with data through April 23, 2026.
How much does solar cost in 93221?
The median residential system in 93221 cost $4.19 per watt over the trailing twelve months, $0.07/W below the California median.
Is solar growing in 93221?
Installations in 93221 are down 3.6%: 132 in the trailing twelve months versus 137 before.
Who installs solar in 93221?
SUNRUN, TESLA, J P ELECTRIC SERVICE lead the 205 installers with systems in 93221. The full comp set is above.
Is 93221 a good market for solar sales?
93221 scores 46 out of 100 (Great, higher than 70% of U.S. zip markets).