Hayward, CA 94542 solar market data
Updated April 15, 2026 By The SolarDNA Data Team
Hayward 94542 has 1,520 solar installations at a median installed cost of $4.38/W, installations down 12.0% over the trailing twelve months, and a Market Score of 42 — higher than 54% of U.S. zip markets.
Versus California
How 94542 compares with the state
Installed cost
$0.11/W above
state median $4.26/W
Market score
42 vs 53
California scores 53
Share of state installs
0.07%
of 2.3M tracked statewide
Battery attach
14.9%
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: 56–68 installs (midpoint 62)
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
94542 by year
66 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 94542
Ranked by systems recorded in this zip
| # | Installer | Installs | 12-mo | Avg kW | $/W |
|---|---|---|---|---|---|
| 1 | TESLA | 361 | 12 | 6.68 | $5.10 |
| 2 | SUNRUN | 171 | 8 | 5.59 | $4.20 |
| 3 | SUNPOWER | 148 | 0 | 4.44 | $4.50 |
| 4 | PETERSENDEAN | 103 | 0 | 4.65 | $4.03 |
| 5 | SEMPER SOLARIS | 64 | 2 | 6.28 | $4.26 |
| 6 | YOUR ENERGY SOLUTIONS | 32 | 3 | 7.4 | $3.64 |
| 7 | BRIGHT OPS | 24 | 7 | 6.17 | $6.96 |
| 8 | BETTER EARTH | 23 | 0 | 7.33 | $5.17 |
| 9 | SUNGEVITY | 21 | 0 | 5.53 | $3.98 |
| 10 | THE SOLAR COMPANY | 19 | 0 | 6.32 | $6.29 |
| 11 | HOOKED ON SOLAR | 16 | 1 | 6.87 | $4.34 |
| 12 | CITADEL ROOFING AND SOLAR | 15 | 0 | 4.42 | $3.48 |
Neighboring zips
The nearest zip markets
By distance between zip centroids
| Zip | Distance | Installs | $/W | Score |
|---|---|---|---|---|
| 94544 Hayward | 2.9 km | 3,341 | $4.25 | 46 |
| 94541 Hayward | 4.1 km | 1,929 | $4.64 | 47 |
| 94545 Hayward | 5.2 km | 1,650 | $4.50 | 43 |
| 94546 Castro Valley | 5.5 km | 2,887 | $4.54 | 56 |
| 94552 Castro Valley | 6.1 km | 1,477 | $4.54 | 43 |
| 94580 San Lorenzo | 7.6 km | 929 | $4.73 | 36 |
Same city
Other zips in Hayward
Equipment
What gets installed in 94542
Share of systems with a recorded brand
Modules
SUNPOWER16.7%
QCELLS NORTH AMERICA15.4%
LG ELECTRONICS7.5%
CSI SOLAR7.3%
REC SOLAR5.6%
Inverters
SOLAREDGE25.9%
ENPHASE ENERGY23.8%
SUNPOWER13.0%
TESLA8.1%
FRONIUS USA7.6%
Frequently asked
Quick answers about 94542
How many solar installations are there in 94542?
SolarDNA counts 1,520 active solar installations in Hayward 94542, 1,512 of them residential, with data through April 15, 2026.
How much does solar cost in 94542?
The median residential system in 94542 cost $4.38 per watt over the trailing twelve months, $0.11/W above the California median.
Is solar growing in 94542?
Installations in 94542 are down 12.0%: 66 in the trailing twelve months versus 75 before.
Who installs solar in 94542?
TESLA, SUNRUN, SUNPOWER lead the 217 installers with systems in 94542. The full comp set is above.
Is 94542 a good market for solar sales?
94542 scores 42 out of 100 (Good, higher than 54% of U.S. zip markets).