Whittier, CA 90603 solar market data
Updated April 8, 2026 By The SolarDNA Data Team
Whittier 90603 has 1,019 solar installations at a median installed cost of $4.41/W, installations up 28.8% over the trailing twelve months, and a Market Score of 50 — higher than 88% of U.S. zip markets.
Versus California
How 90603 compares with the state
Installed cost
$0.14/W above
state median $4.26/W
Market score
50 vs 53
California scores 53
Share of state installs
0.05%
of 2.3M tracked statewide
Battery attach
17.6%
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: 74–100 installs (midpoint 87)
Trailing-12-month installs carried forward at half the observed growth rate (capped at ±30%), with a ±14% band. Not a forecast of permits or policy.
Growth & pricing
90603 by year
76 installs in the trailing twelve months vs 59 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in 90603
Ranked by systems recorded in this zip
| # | Installer | Installs | 12-mo | Avg kW | $/W |
|---|---|---|---|---|---|
| 1 | SUNRUN | 186 | 12 | 6.33 | $4.02 |
| 2 | TESLA | 93 | 6 | 6.53 | $5.12 |
| 3 | BRIGHT OPS | 36 | 11 | 7.09 | $4.30 |
| 4 | VERENGO | 33 | 0 | 6.23 | $4.45 |
| 5 | SUNPOWER | 31 | 0 | 7.93 | $5.09 |
| 6 | SEMPER SOLARIS | 24 | 1 | 7.74 | $4.65 |
| 7 | FREEDOM FOREVER | 23 | 2 | 7.69 | $4.46 |
| 8 | SOLARMAX | 18 | 0 | 8.07 | $3.15 |
| 9 | BETTER EARTH | 16 | 0 | 8.42 | $5.29 |
| 10 | SKYLINE SMART ENERGY | 15 | 2 | 8.71 | $5.71 |
| 11 | SUNGEVITY | 14 | 0 | 6.05 | $3.90 |
| 12 | ESP CONTRACTING | 13 | 0 | 7.72 | $5.03 |
Neighboring zips
The nearest zip markets
By distance between zip centroids
| Zip | Distance | Installs | $/W | Score |
|---|---|---|---|---|
| 90604 Whittier | 2.3 km | 1,444 | $4.68 | 46 |
| 90605 Whittier | 4.0 km | 1,249 | $4.63 | 47 |
| 90631 La Habra | 4.2 km | 2,833 | $4.25 | 51 |
| 90638 La Mirada | 4.4 km | 2,094 | $4.43 | 59 |
| 90633 La Habra | 4.5 km | 37 | $4.50 | 37 |
| 90602 Whittier | 4.8 km | 914 | $4.25 | 43 |
Same city
Other zips in Whittier
Equipment
What gets installed in 90603
Share of systems with a recorded brand
Modules
QCELLS NORTH AMERICA21.3%
SUNPOWER8.5%
JA SOLAR7.6%
LONGI GREEN ENERGY TECHNOLOGY7.0%
CSI SOLAR6.8%
Inverters
SOLAREDGE37.2%
ENPHASE ENERGY36.3%
SUNPOWER6.2%
TESLA4.9%
ABB3.8%
Frequently asked
Quick answers about 90603
How many solar installations are there in 90603?
SolarDNA counts 1,019 active solar installations in Whittier 90603, 1,010 of them residential, with data through April 8, 2026.
How much does solar cost in 90603?
The median residential system in 90603 cost $4.41 per watt over the trailing twelve months, $0.14/W above the California median.
Is solar growing in 90603?
Installations in 90603 are up 28.8%: 76 in the trailing twelve months versus 59 before.
Who installs solar in 90603?
SUNRUN, TESLA, BRIGHT OPS lead the 260 installers with systems in 90603. The full comp set is above.
Is 90603 a good market for solar sales?
90603 scores 50 out of 100 (Great, higher than 88% of U.S. zip markets).