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Solar Companies in Oceanside, CA: Who Installed the Most Systems in 2025
Utility records show 745 home solar systems connected in Oceanside in 2025. Sunrun Inc. was the installer of record on 268 of them, followed by GAF Energy (43) and SunPower Corporation (41). 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
- SDG&E
- 45.5¢/kWh average residential rate, CPUC
- CPUC Public Advocates Officechecked Sep 22, 2026
Installers who connected the most home solar systems in Oceanside in 2025
| Installer (name as reported) | Systems in 2025 | Jan 2024 to May 2026 | CSLB license |
|---|---|---|---|
| Sunrun Inc. | 268 | 643 | 750184 check |
| GAF Energy | 43 | 154 | 1062345 check |
| SunPower Corporation | 41 | 199 | 890895 check |
| Bright Planet Solar | 36 | 94 | 1020761 check |
| Baker Electric, Inc. | 30 | 64 | 858088 check |
| Stellar Solar | 24 | 50 | 749095 check |
| Freedom Solar Co | 24 | 59 | 1029644 check |
| Semper Solaris Construction Inc | 19 | 53 | 978152 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 Oceanside by the numbers
SDG&E approved 745 home solar systems in Oceanside in 2025, from 117 installers; the top three were named on 47% of them. The busiest year since 2021 was 2023, with 2,367 (2025: -69%). Another 340 were approved from January through May 2026.
2025 mix: 45% leased or on a power purchase agreement, 55% owned by the household; 0% with a battery; median size 5.02 kW DC. San Diego County: 36% leased or PPA, 0% with a battery, median 5.36 kW.
| Year | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|
| Systems connected | 1,316 | 2,084 | 2,367 | 897 | 745 |
Who connects a Oceanside solar system
SDG&E connected every Oceanside system in the 2025 records. A new Oceanside system on SDG&E goes on the CPUC Net Billing Tariff; the key facts above give SDG&E's average rate.
Verify the company behind the Oceanside quote
Match the business name and license number on each Oceanside 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 Oceanside rates and bills page.
Permit fees and the filing route are on the Oceanside solar cost and permit page.
Before you sign anything in Oceanside
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 Oceanside?
In 2025 interconnection records, Sunrun Inc. was the installer on 268 home systems in Oceanside, GAF Energy on 43 and SunPower Corporation on 41, out of 745. Since January 2024 the same companies were named on 643, 154, 199 systems. That is a count, not a ranking.
Do most Oceanside homeowners buy or lease their solar?
Of 745 home systems connected in Oceanside in 2025, 45% were leased or on a power purchase agreement and 0% had a battery; the median size was 5.02 kW DC.
How do I check a Oceanside solar company's license?
Look the number up on the CSLB's Check a License page. For the companies named on the most Oceanside systems in 2025, the applications list 750184 for Sunrun Inc., 1062345 for GAF Energy and 890895 for SunPower Corporation. The CSLB record shows the status, classification and any complaint disclosure.
Ask for a competing quote
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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