Diamond Bar, CA 91765 solar market data
Updated May 8, 2026 By The SolarDNA Data Team
Diamond Bar 91765 has 2,593 solar installations at a median installed cost of $4.08/W, installations up 47.6% over the trailing twelve months, and a Market Score of 61 — higher than 99% of U.S. zip markets.
Zip Market Score
Excellent · higher than 99% of zips
Versus California
How 91765 compares with the state
Installed cost
$0.19/W below
state median $4.26/W
Market score
61 vs 53
California scores 53
Share of state installs
0.11%
of 2.3M tracked statewide
Battery attach
18.5%
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: 179–241 installs (midpoint 210)
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
91765 by year
183 installs in the trailing twelve months vs 124 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in 91765
Ranked by systems recorded in this zip
| # | Installer | Installs | 12-mo | Avg kW | $/W |
|---|---|---|---|---|---|
| 1 | TESLA | 416 | 22 | 10.09 | $5.12 |
| 2 | SUNRUN | 297 | 38 | 8.02 | $4.04 |
| 3 | LEONARD ROOFING | 113 | 0 | 3.29 | $2.28 |
| 4 | SOLARMAX | 97 | 0 | 8.06 | $3.25 |
| 5 | SUNPOWER | 80 | 0 | 14.11 | $5.08 |
| 6 | FREEDOM FOREVER | 69 | 7 | 8.6 | $3.89 |
| 7 | POWUR | 42 | 0 | 9.7 | $4.03 |
| 8 | SOLAR VAST | 40 | 0 | 7.96 | $3.82 |
| 9 | TRUE POWER SOLAR | 40 | 0 | 9.42 | $5.46 |
| 10 | PETERSENDEAN | 36 | 0 | 7.09 | $3.91 |
| 11 | SUNGEVITY | 34 | 0 | 5.91 | $4.07 |
| 12 | VERENGO | 33 | 0 | 7.06 | $4.34 |
Equipment
What gets installed in 91765
Share of systems with a recorded brand
Modules
QCELLS NORTH AMERICA18.0%
SUNPOWER11.4%
KYOCERA SOLAR6.1%
LG ELECTRONICS5.9%
REC GROUP4.9%
Inverters
ENPHASE ENERGY35.6%
SOLAREDGE26.9%
SUNPOWER7.7%
ABB7.1%
TESLA5.9%
Frequently asked
Quick answers about 91765
How many solar installations are there in 91765?
SolarDNA counts 2,593 active solar installations in Diamond Bar 91765, 2,571 of them residential, with data through May 8, 2026.
How much does solar cost in 91765?
The median residential system in 91765 cost $4.08 per watt over the trailing twelve months, $0.19/W below the California median.
Is solar growing in 91765?
Installations in 91765 are up 47.6%: 183 in the trailing twelve months versus 124 before.
Who installs solar in 91765?
TESLA, SUNRUN, LEONARD ROOFING lead the 415 installers with systems in 91765. The full comp set is above.
Is 91765 a good market for solar sales?
91765 scores 61 out of 100 (Excellent, higher than 99% of U.S. zip markets).