Walnut Creek, CA 94598 solar market data
Updated April 15, 2026 By The SolarDNA Data Team
Walnut Creek 94598 has 2,819 solar installations at a median installed cost of $4.29/W, installations up 6.8% over the trailing twelve months, and a Market Score of 50 — higher than 88% of U.S. zip markets.
Versus California
How 94598 compares with the state
Installed cost
$0.02/W above
state median $4.26/W
Market score
50 vs 53
California scores 53
Share of state installs
0.12%
of 2.3M tracked statewide
Battery attach
10.6%
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: 147–179 installs (midpoint 163)
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
94598 by year
158 installs in the trailing twelve months vs 148 before
Installations by year
Median installed cost, $/W DC by year
Installer comp set
Who installs in 94598
Ranked by systems recorded in this zip
| # | Installer | Installs | 12-mo | Avg kW | $/W |
|---|---|---|---|---|---|
| 1 | TESLA | 396 | 16 | 8.17 | $4.94 |
| 2 | SUNRUN | 318 | 14 | 7.2 | $4.35 |
| 3 | SUNPOWER | 103 | 0 | 27.28 | $4.26 |
| 4 | DIABLO SOLAR SERVICES | 97 | 0 | 7.47 | $4.29 |
| 5 | GOT WATTS ELECTRIC | 88 | 0 | 8.76 | $3.67 |
| 6 | SOLAR TECHNOLOGIES | 85 | 5 | 10.45 | $4.46 |
| 7 | WEST COAST SOLAR | 66 | 0 | 8.05 | $3.75 |
| 8 | SUNGEVITY | 65 | 0 | 6.48 | $3.85 |
| 9 | PETERSENDEAN | 64 | 0 | 7.04 | $3.99 |
| 10 | QUICK SYSTEMS | 62 | 0 | 7.04 | $3.75 |
| 11 | KOTA CONSTRUCTION | 55 | 0 | 6.78 | $4.91 |
| 12 | SKY POWER SOLAR | 55 | 0 | 8.22 | $4.14 |
Neighboring zips
The nearest zip markets
By distance between zip centroids
| Zip | Distance | Installs | $/W | Score |
|---|---|---|---|---|
| 94596 Walnut Creek | 3.0 km | 1,320 | $4.23 | 47 |
| 94518 Concord | 3.4 km | 1,953 | $4.35 | 55 |
| 94597 Walnut Creek | 4.0 km | 1,222 | $4.10 | 46 |
| 94523 Pleasant Hill | 5.7 km | 2,904 | $4.33 | 54 |
| 94521 Concord | 6.2 km | 3,446 | $4.45 | 54 |
| 94595 Walnut Creek | 6.3 km | 1,125 | $4.27 | 47 |
Same city
Other zips in Walnut Creek
Equipment
What gets installed in 94598
Share of systems with a recorded brand
Modules
SUNPOWER13.7%
QCELLS NORTH AMERICA13.3%
LG ELECTRONICS6.9%
REC GROUP5.8%
CSI SOLAR5.2%
Inverters
ENPHASE ENERGY34.8%
SOLAREDGE26.8%
SUNPOWER10.3%
TESLA7.8%
SMA AMERICA5.8%
Frequently asked
Quick answers about 94598
How many solar installations are there in 94598?
SolarDNA counts 2,819 active solar installations in Walnut Creek 94598, 2,793 of them residential, with data through April 15, 2026.
How much does solar cost in 94598?
The median residential system in 94598 cost $4.29 per watt over the trailing twelve months, $0.02/W above the California median.
Is solar growing in 94598?
Installations in 94598 are up 6.8%: 158 in the trailing twelve months versus 148 before.
Who installs solar in 94598?
TESLA, SUNRUN, SUNPOWER lead the 297 installers with systems in 94598. The full comp set is above.
Is 94598 a good market for solar sales?
94598 scores 50 out of 100 (Great, higher than 88% of U.S. zip markets).