Fullerton, CA 92831 solar market data
Updated April 14, 2026 By The SolarDNA Data Team
Fullerton 92831 has 1,229 solar installations at a median installed cost of $4.19/W, installations up 23.4% over the trailing twelve months, and a Market Score of 51 — higher than 91% of U.S. zip markets.
Zip Market Score
Excellent · higher than 91% of zips
Versus California
How 92831 compares with the state
Installed cost
$0.08/W below
state median $4.26/W
Market score
51 vs 53
California scores 53
Share of state installs
0.05%
of 2.3M tracked statewide
Battery attach
19.4%
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: 94–118 installs (midpoint 106)
Trailing-12-month installs carried forward at half the observed growth rate (capped at ±30%), with a ±12% band. Not a forecast of permits or policy.
Growth & pricing
92831 by year
95 installs in the trailing twelve months vs 77 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in 92831
Ranked by systems recorded in this zip
| # | Installer | Installs | 12-mo | Avg kW | $/W |
|---|---|---|---|---|---|
| 1 | TESLA | 168 | 7 | 9.34 | $5.10 |
| 2 | SUNRUN | 160 | 16 | 7.77 | $4.58 |
| 3 | VERENGO | 32 | 0 | 6.23 | $4.28 |
| 4 | SUNPOWER | 29 | 0 | 30.03 | $5.12 |
| 5 | FREEDOM FOREVER | 28 | 3 | 7.69 | $4.34 |
| 6 | SUNGEVITY | 25 | 0 | 6.81 | $4.07 |
| 7 | ORANGE COUNTY CONTRACTING SERVICES | 21 | 11 | 9.24 | $4.62 |
| 8 | INFINITY ELECTRIC | 21 | 0 | 7.5 | $2.96 |
| 9 | SOLARMAX | 21 | 0 | 9.24 | $3.26 |
| 10 | CLEAN INITIATIVE | 20 | 0 | 5.6 | $4.21 |
| 11 | BRIGHT OPS | 17 | 3 | 8.01 | $4.24 |
| 12 | SUNLUX ENERGY | 17 | 0 | 12.37 | $3.08 |
Neighboring zips
The nearest zip markets
By distance between zip centroids
| Zip | Distance | Installs | $/W | Score |
|---|---|---|---|---|
| 92835 Fullerton | 1.7 km | 1,790 | $4.04 | 60 |
| 92832 Fullerton | 3.6 km | 713 | $4.34 | 42 |
| 92870 Placentia | 4.0 km | 3,143 | $4.25 | 61 |
| 92821 Brea | 4.7 km | 2,159 | $4.25 | 61 |
| 92833 Fullerton | 5.7 km | 1,965 | $4.17 | 49 |
| 92806 Anaheim | 6.2 km | 7 | $3.90 | 40 |
Same city
Other zips in Fullerton
Equipment
What gets installed in 92831
Share of systems with a recorded brand
Modules
QCELLS NORTH AMERICA18.8%
SUNPOWER7.1%
REC GROUP6.6%
LG ELECTRONICS6.3%
CSI SOLAR6.1%
Inverters
ENPHASE ENERGY36.0%
SOLAREDGE30.7%
TESLA6.0%
ABB5.7%
SMA AMERICA4.6%
Frequently asked
Quick answers about 92831
How many solar installations are there in 92831?
SolarDNA counts 1,229 active solar installations in Fullerton 92831, 1,186 of them residential, with data through April 14, 2026.
How much does solar cost in 92831?
The median residential system in 92831 cost $4.19 per watt over the trailing twelve months, $0.08/W below the California median.
Is solar growing in 92831?
Installations in 92831 are up 23.4%: 95 in the trailing twelve months versus 77 before.
Who installs solar in 92831?
TESLA, SUNRUN, VERENGO lead the 328 installers with systems in 92831. The full comp set is above.
Is 92831 a good market for solar sales?
92831 scores 51 out of 100 (Excellent, higher than 91% of U.S. zip markets).