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California solar decisions
Solar Companies in Walnut Creek, CA: Who Installed the Most Systems in 2025
Utility records show 386 home solar systems connected in Walnut Creek in 2025. Sunrun was the installer of record on 49 of them, followed by Tesla Energy Operations Inc (43) and Citadel Roofing and Solar (40). The table lists each company's CSLB license number. It is a count from public records, not a ranking or endorsement: check each license and get at least three quotes.
California Rate Relief is a private solar referral service.
Key facts
- Electric utility
- PG&E
- 33.7¢/kWh average residential rate, CPUC
- CPUC Public Advocates Officechecked Sep 22, 2026
Installers who connected the most home solar systems in Walnut Creek in 2025
| Installer (name as reported) | Systems in 2025 | Jan 2024 to May 2026 | CSLB license |
|---|---|---|---|
| Sunrun | 49 | 121 | 750184 check |
| Tesla Energy Operations Inc | 43 | 84 | 888104 check |
| Citadel Roofing and Solar | 40 | 110 | 647149 check |
| Got Watts Electric, Solar & HVAC | 32 | 59 | 985920 check |
| Solar Technologies | 17 | 27 | 932914 check |
| Freedom Forever | 10 | 18 | 1125479 check |
| Bright Ops | 10 | 19 | 1020761 check |
| Your Energy Solutions | 9 | 17 | 928652 check |
Counts from utility records, not a ranking or endorsement. Check each license's status and complaint history on the CSLB's Check a License page (checked Sept. 24, 2026).
Source: California Distributed Generation Statistics (CPUC), Interconnected Project Sites data set, data through May 31, 2026 (checked Sept. 24, 2026).
Home solar in Walnut Creek by the numbers
PG&E approved 386 home solar systems in Walnut Creek in 2025, from 87 installers; the top three were named on 34% of them. The busiest year since 2021 was 2022, with 770 (2025: -50%). Another 169 were approved from January through May 2026.
2025 mix: 21% leased or on a power purchase agreement, 79% owned by the household; 46% with a battery; median size 7.16 kW DC. Contra Costa County: 43% leased or PPA, 58% with a battery, median 6.48 kW.
| Year | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|
| Systems connected | 430 | 770 | 705 | 330 | 386 |
Who connects a Walnut Creek solar system
PG&E connected every Walnut Creek system in the 2025 records. A new Walnut Creek system on PG&E goes on the CPUC Net Billing Tariff; the key facts above give PG&E's average rate.
Verify the company behind the Walnut Creek quote
Match the business name and license number on each Walnut Creek proposal to the CSLB record, then use our contractor verification steps, the quote comparison guide and the PPA, loan, lease and cash comparison. What you pay the utility today is on the Walnut Creek rates and bills page.
Permit fees and the filing route are on the Walnut Creek solar cost and permit page.
Before you sign anything in Walnut Creek
Two of the contract terms that most often change what a quote really costs.
Frequently asked questions
Which solar companies install the most systems in Walnut Creek?
In 2025 interconnection records, Sunrun was the installer on 49 home systems in Walnut Creek, Tesla Energy Operations Inc on 43 and Citadel Roofing and Solar on 40, out of 386. Since January 2024 the same companies were named on 121, 84, 110 systems. That is a count, not a ranking.
Do most Walnut Creek homeowners buy or lease their solar?
Of 386 home systems connected in Walnut Creek in 2025, 21% were leased or on a power purchase agreement and 46% had a battery; the median size was 7.16 kW DC.
How do I check a Walnut Creek solar company's license?
Look the number up on the CSLB's Check a License page. For the companies named on the most Walnut Creek systems in 2025, the applications list 750184 for Sunrun, 888104 for Tesla Energy Operations Inc and 647149 for Citadel Roofing and Solar. The CSLB record shows the status, classification and any complaint disclosure.
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Start with the utility on your bill and what you pay in a typical month. Contact details come after that. Submitting does not guarantee that a provider will quote your project.
California Rate Relief is a referral service. We are not a licensed contractor. California Rate Relief is compensated by a solar provider when a homeowner we refer signs an agreement. How we make money
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