West Covina, CA 91790 solar market data
Updated April 30, 2026 By The SolarDNA Data Team
West Covina 91790 has 1,927 solar installations at a median installed cost of $4.25/W, installations down 4.4% over the trailing twelve months, and a Market Score of 47 — higher than 76% of U.S. zip markets.
Versus California
How 91790 compares with the state
Installed cost
$0.01/W below
state median $4.26/W
Market score
47 vs 53
California scores 53
Share of state installs
0.09%
of 2.3M tracked statewide
Battery attach
14.4%
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: 113–139 installs (midpoint 126)
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
91790 by year
129 installs in the trailing twelve months vs 135 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in 91790
Ranked by systems recorded in this zip
| # | Installer | Installs | 12-mo | Avg kW | $/W |
|---|---|---|---|---|---|
| 1 | SUNPOWER | 303 | 0 | 5.55 | $4.25 |
| 2 | TESLA | 197 | 11 | 6.26 | $5.12 |
| 3 | SUNRUN | 153 | 13 | 7.86 | $3.97 |
| 4 | ESP CONTRACTING | 63 | 0 | 6.93 | $4.24 |
| 5 | VERENGO | 61 | 0 | 6.19 | $4.26 |
| 6 | BRIGHT OPS | 60 | 4 | 8.34 | $4.05 |
| 7 | FREEDOM FOREVER | 48 | 6 | 7.92 | $4.02 |
| 8 | SUNGEVITY | 37 | 0 | 6.1 | $3.65 |
| 9 | C S S CONSTRUCTION | 31 | 25 | 2.87 | $2.86 |
| 10 | SOLARMAX | 30 | 0 | 6.5 | $3.36 |
| 11 | SWSS ELECTRIC | 26 | 2 | 7.27 | $3.13 |
| 12 | CLEAN INITIATIVE | 26 | 0 | 6.74 | $4.60 |
Neighboring zips
The nearest zip markets
By distance between zip centroids
| Zip | Distance | Installs | $/W | Score |
|---|---|---|---|---|
| 91793 West Covina | 0.3 km | 8 | $3.43 | 42 |
| 91791 West Covina | 3.6 km | 1,975 | $4.22 | 46 |
| 91744 La Puente | 4.3 km | 2,074 | $4.51 | 39 |
| 91722 Covina | 4.3 km | 1,523 | $4.25 | 38 |
| 91706 Baldwin Park | 4.4 km | 1,510 | $4.43 | 44 |
| 91746 La Puente | 5.2 km | 818 | $4.43 | 42 |
Same city
Other zips in West Covina
Equipment
What gets installed in 91790
Share of systems with a recorded brand
Modules
QCELLS NORTH AMERICA20.7%
SUNPOWER18.9%
CSI SOLAR7.3%
LONGI GREEN ENERGY TECHNOLOGY5.5%
KYOCERA SOLAR4.0%
Inverters
ENPHASE ENERGY34.8%
SOLAREDGE29.9%
SUNPOWER14.0%
ABB5.5%
TESLA4.1%
Frequently asked
Quick answers about 91790
How many solar installations are there in 91790?
SolarDNA counts 1,927 active solar installations in West Covina 91790, 1,900 of them residential, with data through April 30, 2026.
How much does solar cost in 91790?
The median residential system in 91790 cost $4.25 per watt over the trailing twelve months, $0.01/W below the California median.
Is solar growing in 91790?
Installations in 91790 are down 4.4%: 129 in the trailing twelve months versus 135 before.
Who installs solar in 91790?
SUNPOWER, TESLA, SUNRUN lead the 314 installers with systems in 91790. The full comp set is above.
Is 91790 a good market for solar sales?
91790 scores 47 out of 100 (Great, higher than 76% of U.S. zip markets).