Diablo, CA 94528 solar market data
Updated April 24, 2026Provisional score · under 500 installs By The SolarDNA Data Team
Diablo 94528 has 125 solar installations at a median installed cost of $4.57/W, recent growth not yet measurable, and a Market Score of 38 — higher than 19% of U.S. zip markets.
Versus California
How 94528 compares with the state
Installed cost
$0.30/W above
state median $4.26/W
Market score
38 vs 53
California scores 53
Share of state installs
0.01%
of 2.3M tracked statewide
Battery attach
20.0%
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
Growth & pricing
94528 by year
12 installs in the trailing twelve months vs 13 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in 94528
Ranked by systems recorded in this zip
| # | Installer | Installs | 12-mo | Avg kW | $/W |
|---|---|---|---|---|---|
| 1 | TESLA | 18 | 2 | 10.2 | $4.88 |
| 2 | SOLAR TECHNOLOGIES | 8 | 2 | 12.67 | $4.48 |
| 3 | SKY POWER SOLAR | 8 | 0 | 13.49 | $3.31 |
| 4 | SUNRUN | 7 | 1 | 10.74 | $4.56 |
| 5 | SEMPER FIDELIS CONSTRUCTION | 6 | 0 | 9.43 | $5.00 |
| 6 | HOOKED ON SOLAR | 5 | 1 | 9.68 | $4.64 |
| 7 | YOUR ENERGY SOLUTIONS | 4 | 1 | 8.65 | $5.56 |
| 8 | CITADEL ROOFING AND SOLAR | 3 | 1 | 8.89 | $3.69 |
| 9 | AMBROSE SOLAR | 3 | 0 | 7.63 | $7.14 |
| 10 | DIABLO SOLAR SERVICES | 3 | 0 | 10.84 | $4.18 |
| 11 | NEXT ENERGY | 3 | 0 | 15.8 | $7.72 |
| 12 | COOL EARTH SOLAR | 2 | 0 | 42.95 | $2.36 |
Equipment
What gets installed in 94528
Share of systems with a recorded brand
Modules
SUNPOWER22.7%
QCELLS NORTH AMERICA17.3%
REC SOLAR6.4%
LG ELECTRONICS5.5%
CSI SOLAR4.5%
Inverters
ENPHASE ENERGY30.1%
SOLAREDGE16.8%
SUNPOWER16.8%
SMA AMERICA12.4%
TESLA9.7%
Frequently asked
Quick answers about 94528
How many solar installations are there in 94528?
SolarDNA counts 125 active solar installations in Diablo 94528, 123 of them residential, with data through April 24, 2026.
How much does solar cost in 94528?
The median residential system in 94528 cost $4.57 per watt over the trailing twelve months, $0.30/W above the California median.
Is solar growing in 94528?
Recent growth cannot be measured yet for 94528: too few recent installs (data runs through April 24, 2026).
Who installs solar in 94528?
TESLA, SOLAR TECHNOLOGIES, SKY POWER SOLAR lead the 56 installers with systems in 94528. The full comp set is above.
Is 94528 a good market for solar sales?
94528 scores 38 out of 100 (Fair, higher than 19% of U.S. zip markets). With under 500 installations the score is provisional.