Diamond Bar, CA solar installation & market data
Updated May 8, 2026 By The SolarDNA Data Team
Diamond Bar has 2,593 solar installations across 1 zip code at a median installed cost of $4.08/W, installations up 47.6% over the trailing twelve months, and an installs-weighted Market Score of 61.
Active installations
2,593
Zip markets
1
Median cost
$4.08/W
12-mo growth
▲ 47.6%
Installers active
12
City Market Score
Excellent · installs-weighted across 1 zips
Best zip in Diamond Bar scores higher than 99% of U.S. zip markets.
Versus California
How Diamond Bar 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
Diamond Bar 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 Diamond Bar
Summed across every zip in the city
| # | Installer | Installs | 12-mo | Zips | $/W |
|---|---|---|---|---|---|
| 1 | TESLA | 416 | 22 | 1 | $5.12 |
| 2 | SUNRUN | 297 | 38 | 1 | $4.04 |
| 3 | LEONARD ROOFING | 113 | 0 | 1 | $2.28 |
| 4 | SOLARMAX | 97 | 0 | 1 | $3.25 |
| 5 | SUNPOWER | 80 | 0 | 1 | $5.08 |
| 6 | FREEDOM FOREVER | 69 | 7 | 1 | $3.89 |
| 7 | POWUR | 42 | 0 | 1 | $4.03 |
| 8 | SOLAR VAST | 40 | 0 | 1 | $3.82 |
| 9 | TRUE POWER SOLAR | 40 | 0 | 1 | $5.46 |
| 10 | PETERSENDEAN | 36 | 0 | 1 | $3.91 |
| 11 | SUNGEVITY | 34 | 0 | 1 | $4.07 |
| 12 | VERENGO | 33 | 0 | 1 | $4.34 |
Zip markets
Zips in Diamond Bar
Ranked by installations · click for the zip market
| Zip | Installs | $/W | Score |
|---|---|---|---|
| 91765 | 2,593 | $4.08 | 61 A |