Installer profile
Cobalt Power Systems, Inc
Cobalt Power Systems has the strongest paper record in this group and is an easy yes for a quote. CSLB license 820697 has been current and active since June 12, 2003, held by COBALT POWER SYSTEMS INC at 2557 Wyandotte St in Mountain View, where the company runs a 10,000 square foot office and warehouse. One note on geography: this profile exists under a Redwood City listing, but CSLB, BBB, and the company's own about page all place it in Mountain View. Same company, one location. BBB rates it A+, accredited since June 1, 2010, with 1 complaint in the last 3 years and 0 closed in the last 12 months, the cleanest complaint record in this track by a wide margin.
The license is C-46 Solar only, no B or C-10, which is worth understanding rather than worrying about. It means the licensed scope is solar, and 23 years of operating on that single classification says the company knows its lane. The about page states Cobalt was the first SunPower Elite Dealer in the nation and a SunPower Dealer of the Year; that is a historical claim, and the current site instead features Tesla Premier Certified Installer status, Enphase, and QCells. The homepage says the company handles every step in-house, from design through installation and service. Volume claims run from more than 4,500 photovoltaic systems and over 3,000 residential battery backup systems on the homepage to 3,500 plus and 4,000 plus installs on the about page. Those figures are the company's own; no Cobalt entry appears in the reviewed Solar Power World lists.
Two items to check before signing. No workmanship warranty duration or scope appears on the fetched pages, only 25-year equipment warranty references for QCells and Enphase, so ask what Cobalt itself covers and for how long. And the qualifying individual changed on November 8, 2024 to John Paul Bergh, who also remains active on a separate Davis license, Sun Metrics, while BBB and the site still name founder Mark Byington as President. Neither fact is adverse, but a recent QI change at a 23-year-old company is the kind of detail worth one direct question.
The evidence
CSLB issued license 820697 on June 12, 2003, BBB dates the business start to February 13, 2003 with incorporation February 19, 2003, and the about page says Mark Byington founded the company in 2003 in the garage of his Los Altos home. All three sources agree on 2003, making this the longest-licensed company in the track.
Source: CSLB license 820697
BBB shows 1 complaint in the last 3 years and 0 closed in the last 12 months, with no complaint text published, on an A+ profile accredited since June 1, 2010. No complaint disclosure link appears on the CSLB license page, and searches found no attorney general, district attorney, CPUC, or FTC action naming the company.
The company claims more than 4,500 photovoltaic systems and over 3,000 residential battery backup systems on its homepage, and more than 3,500 commercial and residential installs plus a 4,000 plus figure on its about page, but no Cobalt entry appears in the reviewed 2026 or 2025 Solar Power World tables, so the numbers remain company statements.
Source: Cobalt Power about page
CSLB lists COBALT POWER SYSTEMS INC as a current and active corporation with a C-46 Solar classification under license 820697, expiring June 30, 2027, with a $25,000 contractor bond and workers compensation through October 1, 2026. The about page publishes the matching license number. Qualifying individual John Paul Bergh, associated November 8, 2024, also remains active on Davis license 990449, Sun Metrics.
Source: CSLB license 820697
No workmanship warranty duration or scope is stated on the fetched home or about pages; the service-area page returned a client error. The homepage cites 25-year warranties for QCells panels and Enphase equipment, which are manufacturer terms, not Cobalt's own labor coverage.
Source: Cobalt Power homepage
Company facts
| CSLB entity | COBALT POWER SYSTEMS INC, Corporation |
| CSLB license | 820697, C-46 Solar, current and active; issued June 12, 2003; expires June 30, 2027 |
| Address | 2557 Wyandotte St, Mountain View, CA 94043 |
| Contractor bond | American Contractors Indemnity Company, bond SC1034855, $25,000; effective January 1, 2023 |
| Workers compensation | Cypress Insurance Company, policy COWC669369; October 1, 2025 to October 1, 2026 |
| Qualifying individual | John Paul Bergh since November 8, 2024; also active on license 990449, Sun Metrics, Davis. BBB and the site name founder Mark Byington as President |
| BBB | A+, accredited since June 1, 2010; 1 complaint in 3 years, 0 closed in last 12 months; business started February 13, 2003 |
| Founding | 2003, by Mark Byington in the garage of his Los Altos home |
| Volume claims | 4,500+ PV systems and 3,000+ residential battery systems (homepage); 3,500+ installs and 4,000+ installations (about page); company statements only |
| Brand relationships | Tesla Premier Certified Installer, Enphase partnership, QCells panels; first SunPower Elite Dealer claim is historical |
| Stated service area | Silicon Valley, San Francisco Bay Area, and Northern California; interconnects with PG&E, City of Palo Alto Utilities, and Silicon Valley Power |
Data pulled August 28, 2026 from CSLB license 820697, CSLB personnel list, John Paul Bergh, BBB profile, Cobalt Power Systems, Inc., Cobalt Power about page and Solar Power World 2026 list.
How to read this
This B reflects 23 years of clean state records and the best complaint numbers in the group, held back only by what the company does not publish: its own workmanship warranty terms and any third-party volume figure. Both gaps close with one email. Ask for the labor warranty in writing with a stated duration, and confirm which entity and crew handle your job given the November 2024 qualifying-individual change. 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.