Glendora, CA 91740 solar market data
Updated May 11, 2026 By The SolarDNA Data Team
Glendora 91740 has 1,134 solar installations at a median installed cost of $4.23/W, installations up 20.0% over the trailing twelve months, and a Market Score of 49 — higher than 85% of U.S. zip markets.
Versus California
How 91740 compares with the state
Installed cost
$0.04/W below
state median $4.26/W
Market score
49 vs 53
California scores 53
Share of state installs
0.05%
of 2.3M tracked statewide
Battery attach
17.8%
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: 89–109 installs (midpoint 99)
Trailing-12-month installs carried forward at half the observed growth rate (capped at ±30%), with a ±10% band. Not a forecast of permits or policy.
Growth & pricing
91740 by year
90 installs in the trailing twelve months vs 75 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in 91740
Ranked by systems recorded in this zip
| # | Installer | Installs | 12-mo | Avg kW | $/W |
|---|---|---|---|---|---|
| 1 | SUNRUN | 163 | 14 | 7.58 | $4.22 |
| 2 | TESLA | 112 | 1 | 8.82 | $5.11 |
| 3 | SUNPOWER | 55 | 0 | 5.17 | $3.80 |
| 4 | FREEDOM FOREVER | 33 | 6 | 7.46 | $3.98 |
| 5 | V3 ELECTRIC | 27 | 11 | 6.42 | $2.93 |
| 6 | BRIGHT OPS | 25 | 3 | 7.92 | $4.35 |
| 7 | SUNGEVITY | 25 | 0 | 6.54 | $3.81 |
| 8 | SEMPER SOLARIS | 21 | 1 | 7.94 | $4.48 |
| 9 | SOLARMAX | 20 | 0 | 9.9 | $3.43 |
| 10 | SUNERGY CONSTRUCTION | 20 | 0 | 7.6 | $3.42 |
| 11 | FUTURE ENERGY SAVERS | 18 | 0 | 5.05 | $6.47 |
| 12 | VERENGO | 18 | 0 | 5.66 | $4.66 |
Neighboring zips
The nearest zip markets
By distance between zip centroids
| Zip | Distance | Installs | $/W | Score |
|---|---|---|---|---|
| 91741 Glendora | 3.0 km | 1,925 | $4.25 | 52 |
| 91724 Covina | 3.9 km | 1,483 | $4.12 | 41 |
| 91702 Azusa | 4.4 km | 316 | $4.50 | 39 |
| 91773 San Dimas | 4.6 km | 1,629 | $4.05 | 45 |
| 91723 Covina | 5.5 km | 856 | $4.25 | 37 |
| 91722 Covina | 5.9 km | 1,523 | $4.25 | 38 |
Same city
Other zips in Glendora
Equipment
What gets installed in 91740
Share of systems with a recorded brand
Modules
QCELLS NORTH AMERICA17.7%
SUNPOWER10.8%
CSI SOLAR9.5%
LONGI GREEN ENERGY TECHNOLOGY5.9%
REC GROUP4.2%
Inverters
ENPHASE ENERGY34.1%
SOLAREDGE34.0%
SMA AMERICA6.4%
SUNPOWER5.8%
ABB5.3%
Frequently asked
Quick answers about 91740
How many solar installations are there in 91740?
SolarDNA counts 1,134 active solar installations in Glendora 91740, 1,113 of them residential, with data through May 11, 2026.
How much does solar cost in 91740?
The median residential system in 91740 cost $4.23 per watt over the trailing twelve months, $0.04/W below the California median.
Is solar growing in 91740?
Installations in 91740 are up 20.0%: 90 in the trailing twelve months versus 75 before.
Who installs solar in 91740?
SUNRUN, TESLA, SUNPOWER lead the 260 installers with systems in 91740. The full comp set is above.
Is 91740 a good market for solar sales?
91740 scores 49 out of 100 (Great, higher than 85% of U.S. zip markets).