Rosemead, CA 91770 solar market data
Updated May 13, 2026 By The SolarDNA Data Team
Rosemead 91770 has 1,270 solar installations at a median installed cost of $4.00/W, installations up 2.5% over the trailing twelve months, and a Market Score of 47 — higher than 74% of U.S. zip markets.
Versus California
How 91770 compares with the state
Installed cost
$0.26/W below
state median $4.26/W
Market score
47 vs 53
California scores 53
Share of state installs
0.06%
of 2.3M tracked statewide
Battery attach
18.7%
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: 152–186 installs (midpoint 169)
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
91770 by year
167 installs in the trailing twelve months vs 163 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in 91770
Ranked by systems recorded in this zip
| # | Installer | Installs | 12-mo | Avg kW | $/W |
|---|---|---|---|---|---|
| 1 | SUNRUN | 179 | 36 | 5.98 | $4.41 |
| 2 | TESLA | 145 | 7 | 9.69 | $5.11 |
| 3 | SWSS ELECTRIC | 68 | 8 | 5.96 | $3.40 |
| 4 | SUNPOWER | 54 | 0 | 15.33 | $4.50 |
| 5 | TRUE POWER SOLAR | 33 | 0 | 5.1 | $3.92 |
| 6 | SOLARMAX | 32 | 0 | 5.79 | $3.25 |
| 7 | SOLAR OPTIMUM DESIGN ELECTRIC | 31 | 0 | 8.19 | $3.01 |
| 8 | FREEDOM FOREVER | 30 | 8 | 6.34 | $3.71 |
| 9 | HLV ELECTRIC | 29 | 0 | 7.71 | $3.52 |
| 10 | SUNNOVA ENERGY CORPORATION | 27 | 0 | 2.88 | — |
| 11 | BURKE ELECTRIC | 21 | 0 | 4.74 | $5.00 |
| 12 | V3 ELECTRIC | 20 | 10 | 5.08 | $5.09 |
Neighboring zips
The nearest zip markets
By distance between zip centroids
| Zip | Distance | Installs | $/W | Score |
|---|---|---|---|---|
| 91776 San Gabriel | 2.7 km | 670 | $4.03 | 46 |
| 91755 Monterey Park | 3.4 km | 638 | $3.82 | 48 |
| 91733 South El Monte | 3.9 km | 833 | $4.17 | 55 |
| 91754 Monterey Park | 4.1 km | 836 | $4.15 | 47 |
| 91731 El Monte | 4.7 km | 405 | $4.27 | 42 |
| 91780 Temple City | 4.9 km | 1,267 | $4.00 | 58 |
Same city
Other zips in Rosemead
Equipment
What gets installed in 91770
Share of systems with a recorded brand
Modules
QCELLS NORTH AMERICA21.3%
SUNPOWER13.1%
LONGI GREEN ENERGY TECHNOLOGY7.4%
REC GROUP6.3%
LG ELECTRONICS4.5%
Inverters
ENPHASE ENERGY41.9%
SOLAREDGE22.3%
SUNPOWER8.4%
TESLA7.0%
SMA AMERICA4.6%
Frequently asked
Quick answers about 91770
How many solar installations are there in 91770?
SolarDNA counts 1,270 active solar installations in Rosemead 91770, 1,242 of them residential, with data through May 13, 2026.
How much does solar cost in 91770?
The median residential system in 91770 cost $4.00 per watt over the trailing twelve months, $0.26/W below the California median.
Is solar growing in 91770?
Installations in 91770 are up 2.5%: 167 in the trailing twelve months versus 163 before.
Who installs solar in 91770?
SUNRUN, TESLA, SWSS ELECTRIC lead the 246 installers with systems in 91770. The full comp set is above.
Is 91770 a good market for solar sales?
91770 scores 47 out of 100 (Great, higher than 74% of U.S. zip markets).