Installer profile
Ambrose Solar
Yes, Ambrose Solar belongs on a quote list. The brand is not a loose match to a license record: CSLB lists Ambrose Construction Inc doing business as Ambrose Solar on active license 979872, with B General Building and C-10 Electrical classifications. The license dates to 2013, while the company says the Ambrose Solar brand began in 2017 from the earlier Ambrose Construction business. Solar Power World also puts Ambrose at national rank 232 in its 2026 contractor list, reporting 4,293.21 kW installed in 2025. That is useful third-party evidence that this is an operating installer, not just a marketing shell.
The weak spot is contractual, not licensing. Ambrose discusses manufacturer performance warranties of up to 25 years and says it provides workmanship guarantees, but it does not publish the duration, scope, exclusions, or party responsible for that workmanship promise. Get that document before signing. The CSLB detail showed no publicly disclosable complaint link when reviewed, which is not proof that no customer has ever complained. Ask who owns the roof and electrical correction if the system has a problem after installation.
The evidence
CSLB issued license 979872 on January 2, 2013. Ambrose says its predecessor, Ambrose Construction, started in 2013 and that Pat and Ian founded Ambrose Solar in 2017. The state record supplies the durable date; the brand history explains the later name.
Source: CSLB license 979872
When this CSLB record was checked, it had no complaint-disclosure link. Public disclosure is legally limited, so the absence means the reviewer saw no disclosable matter, not a lifetime zero-complaint guarantee. BBB identifies Ambrose as accredited but does not publish a complaint total or complaint narrative on its reviewed page.
Source: CSLB license 979872
Solar Power World places Ambrose at 232 nationally in its 2026 contractor list and reports 4,293.21 kW installed during 2025. The listing classifies its primary service as Installer and its work as residential plus commercial and industrial; the 2025 California list places Ambrose 41st statewide.
CSLB lists Ambrose Construction Inc, doing business as Ambrose Solar, as a corporation with active B General Building and C-10 Electrical classifications under license 979872, expiring November 30, 2026. The record lists a $25,000 contractor bond and workers compensation coverage through May 23, 2027.
Source: CSLB license 979872
Ambrose says manufacturers back products with performance warranties of up to 25 years and that it provides workmanship guarantees for installation quality. The reviewed pages do not publish the workmanship duration, exclusions, remedy, or responsible legal party. Manufacturer coverage does not answer the labor question.
Source: Ambrose Solar maintenance guide
Company facts
| CSLB entity | Ambrose Construction Inc, doing business as Ambrose Solar, Corporation |
| CSLB license | 979872, B General Building | C-10 Electrical, current and active; issued January 2, 2013; expires November 30, 2026 |
| Address | 820 Eubanks Drive Ste A, Vacaville, CA 95688 |
| Contractor bond | American Contractors Indemnity Company, bond 100417553, $25,000; effective January 1, 2023 |
| Workers compensation | Midwest Employers Casualty Company, policy BNET871600046; May 23, 2026 to May 23, 2027 |
| Solar brand founding claim | 2017; predecessor Ambrose Construction started in 2013 |
| Stated service area | Solano, Yolo, Napa, and Sacramento counties |
| Workmanship warranty | Guarantee claimed; duration and contract terms not published or found |
Data pulled August 24, 2026 from CSLB license 979872, Ambrose Solar about page, Ambrose Solar maintenance guide, Ambrose Solar service area and Solar Power World 2026 list.
How to read this
A B here is not a promise that every job will go smoothly. It says the licensing and operating record clear a meaningful bar, while the warranty document still needs work. Compare Ambrose's signed workmanship terms, not just the equipment brochure, against two other quotes. Make sure the contract names the entity responsible for diagnosing and correcting roof, electrical, and production defects. Our full rubric, including how our own installation business gets graded on the same scale, is on the methodology page. We are a solar installer and we partner with other solar companies. Grading is structurally separated from revenue; see disclosures.