Buena Park, CA 90621 solar market data
Updated April 27, 2026 By The SolarDNA Data Team
Buena Park 90621 has 1,278 solar installations at a median installed cost of $4.25/W, installations up 31.7% over the trailing twelve months, and a Market Score of 53 — higher than 96% of U.S. zip markets.
Zip Market Score
Excellent · higher than 96% of zips
Versus California
How 90621 compares with the state
Installed cost
$0.02/W below
state median $4.26/W
Market score
53 vs 53
California scores 53
Share of state installs
0.06%
of 2.3M tracked statewide
Battery attach
12.5%
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: 81–109 installs (midpoint 95)
Trailing-12-month installs carried forward at half the observed growth rate (capped at ±30%), with a ±15% band. Not a forecast of permits or policy.
Growth & pricing
90621 by year
83 installs in the trailing twelve months vs 63 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in 90621
Ranked by systems recorded in this zip
| # | Installer | Installs | 12-mo | Avg kW | $/W |
|---|---|---|---|---|---|
| 1 | SUNPOWER | 362 | 0 | 3.63 | $4.25 |
| 2 | SUNRUN | 115 | 22 | 6.52 | $3.97 |
| 3 | TESLA | 102 | 6 | 6.45 | $5.12 |
| 4 | SWSS ELECTRIC | 39 | 3 | 7.09 | $1.69 |
| 5 | ELIONE ENERGY | 34 | 7 | 8.76 | $2.75 |
| 6 | FREEDOM FOREVER | 34 | 2 | 6.58 | $3.81 |
| 7 | KBC ENERGY GROUP | 23 | 2 | 12.38 | $3.26 |
| 8 | BRIGHT OPS | 18 | 3 | 7.09 | $4.33 |
| 9 | ADT SOLAR | 18 | 0 | 7.2 | $4.71 |
| 10 | CLEAN INITIATIVE | 15 | 0 | 5.34 | $4.25 |
| 11 | SUNGEVITY | 15 | 0 | 6.32 | $4.31 |
| 12 | VERENGO | 12 | 0 | 6.01 | $4.68 |
Neighboring zips
The nearest zip markets
By distance between zip centroids
| Zip | Distance | Installs | $/W | Score |
|---|---|---|---|---|
| 92833 Fullerton | 3.2 km | 1,965 | $4.17 | 49 |
| 90638 La Mirada | 3.8 km | 2,094 | $4.43 | 59 |
| 90620 Buena Park | 4.1 km | 2,347 | $4.38 | 49 |
| 90623 La Palma | 5.6 km | 854 | $4.20 | 55 |
| 92832 Fullerton | 5.9 km | 713 | $4.34 | 42 |
| 90604 Whittier | 6.2 km | 1,444 | $4.68 | 46 |
Same city
Other zips in Buena Park
Equipment
What gets installed in 90621
Share of systems with a recorded brand
Modules
SUNPOWER33.7%
QCELLS NORTH AMERICA18.5%
CSI SOLAR5.7%
REC GROUP4.0%
KYOCERA SOLAR3.1%
Inverters
SUNPOWER30.0%
ENPHASE ENERGY28.0%
SOLAREDGE23.1%
TESLA4.3%
ABB4.3%
Frequently asked
Quick answers about 90621
How many solar installations are there in 90621?
SolarDNA counts 1,278 active solar installations in Buena Park 90621, 1,250 of them residential, with data through April 27, 2026.
How much does solar cost in 90621?
The median residential system in 90621 cost $4.25 per watt over the trailing twelve months, $0.02/W below the California median.
Is solar growing in 90621?
Installations in 90621 are up 31.7%: 83 in the trailing twelve months versus 63 before.
Who installs solar in 90621?
SUNPOWER, SUNRUN, TESLA lead the 239 installers with systems in 90621. The full comp set is above.
Is 90621 a good market for solar sales?
90621 scores 53 out of 100 (Excellent, higher than 96% of U.S. zip markets).