Solar.com Score
Every published customer review of each company, read in full and scored 0-10 across six categories. Under 20 analyzed review texts: not yet scored. Never for sale. How scores work →
Best solar companies California San Mateo County
Best solar companies in San Mateo County (2026)
Scored installers are ranked by Solar.com Score. Not-yet-scored active companies remain listed below them by recent San Mateo County installs, with public records beside every score.
26,324verified San Mateo County systems
18established companies listed
$5.30/Wmedian reported cost, owned systemsSolar.com base price: $2.59/WMedian is self-reported installed cost on owned-system public interconnection records. Solar.com base price is a starting price before site-specific adders (roof complexity, electrical work, etc.); final quotes vary.
268installers active in 2025
San Mateo County installers, ranked
Solar.com Score leads. Not-yet-scored active companies stay below by recent local installs.Every company with 250 or more verified San Mateo County installs is included. Scored companies receive the numbered rank; unscored rows show a dash.
Install counts: San Mateo County only
| # | Installer | |||||||
|---|---|---|---|---|---|---|---|---|
| 1 | All Bay Solar Construction45 recent installs367 verifiedActive since 20130.0% leased | 45 | 367 | 2013 | 0.0% | 8.6 | Get a direct bid | |
| 2 | Cobalt Power Systems98 recent installs832 verifiedActive since 20040.0% leased | 98 | 832 | 2004 | 0.0% | 8.5 | Get a direct bid | |
| 3 | Clean Solar53 recent installs504 verifiedActive since 20090.0% leased | 53 | 504 | 2009 | 0.0% | 8.5 | Get a direct bid | |
| 4 | Citadel Roofing And Solar66 recent installs283 verifiedActive since 20200.0% leased | 66 | 283 | 2020 | 0.0% | 8.4 | Get a direct bid | |
| 5 | Your Energy Solutions61 recent installs280 verifiedActive since 20140.0% leased | 61 | 280 | 2014 | 0.0% | 8.3 | Get a direct bid | |
| 6 | Solar Optimum Design & Electrical48 recent installs314 verifiedActive since 20190.0% leased | 48 | 314 | 2019 | 0.0% | 8.2 | Get a direct bid | |
| 7 | Simply Solar130 recent installs663 verifiedActive since 20162.3% leased | 130 | 663 | 2016 | 2.3% | 7.7 | Get a direct bid | |
| 8 | Nrg Clean Power56 recent installs328 verifiedActive since 20160.0% leased | 56 | 328 | 2016 | 0.0% | 7.4 | Get a direct bid | |
| 9 | Semper Solaris81 recent installs610 verifiedActive since 20142.3% leased | 81 | 610 | 2014 | 2.3% | 7.4 | Get a direct bid | |
| 10 | Nexus Energy Systems88 recent installs295 verifiedActive since 20154.4% leased | 88 | 295 | 2015 | 4.4% | 7.3 | Get a direct bid | |
| 11 | SunrunIncludes Vivint Solar records465 recent installs2,988 verifiedActive since 201367.6% leased | 465 | 2,988 | 2013 | 67.6% | 6.9 | Get a direct bid | |
| 12 | Better Earth Electric12 recent installs343 verifiedActive since 20203.8% leased | 12 | 343 | 2020 | 3.8% | 6.4 | Get a direct bid | |
| 13 | Tesla EnergyIncludes SolarCity records307 recent installs5,308 verifiedActive since 200713.7% leased | 307 | 5,308 | 2007 | 13.7% | 5.5 | Get a direct bid | |
| 14 | SunPower Corporation27 recent installs1,151 verifiedActive since 20153.9% leased | 27 | 1,151 | 2015 | 3.9% | 5.1 | Get a direct bid | |
| 15 | Freedom Forever68 recent installs251 verifiedActive since 201834.3% leased | 68 | 251 | 2018 | 34.3% | 4.3 | Get a direct bid | |
| — | Bright Planet391 recent installs453 verifiedActive since 201695.4% leased | 391 | 453 | 2016 | 95.4% | Not yet scored | Get a direct bid | |
| — | Bay Area Energy Solutions49 recent installs342 verifiedActive since 20090.0% leased | 49 | 342 | 2009 | 0.0% | Not yet scored | Get a direct bid | |
| — | Petersendean0 recent installs375 verifiedActive since 20080.0% leased | 0 | 375 | 2008 | 0.0% | Not yet scored | Get a direct bid |
Solar.com Scores are live for 15 of the 18 listed companies. Companies marked “Not yet scored” have fewer than 20 analyzed review texts or are still being analyzed; scores appear as each company's full review record is processed. Select up to 4 companies to compare them category by category.
What this data covers: These counts come from PG&E interconnection records, the investor-owned utility service in San Mateo County. Homes served by municipal or cooperative utilities interconnect through their local utility instead and do not appear in these records, so installers focused on those areas show fewer installs here than they actually build.
All install columns are San Mateo County-specific. The county's 268 active installers in 2025 include smaller and occasional operations below the table floor. Acquired brands count under their current parent: SolarCity under Tesla Energy, Vivint Solar under Sunrun. No per-installer price is published in the table.
Recent installs
San Mateo County installs recorded in 2025 and 2026. A big historical name with thin recent activity is a different signal than a company building every week.
Verified installs
Residential systems in San Mateo County public records listing that company as installer of record, all time. Real local activity, not review stars.
% leased
The share of that company's San Mateo County systems recorded as third party owned, a lease or power purchase agreement. Ownership mix, not quality.
% leased counts systems recorded as third party owned, meaning a lease or power purchase agreement. The remainder are customer owned. Active installer counts include every company that filed an interconnection that year, down to small and occasional operations. Counts come from PG&E, SCE, and SDG&E interconnection records; homes served by municipal utilities like LADWP, SMUD, and city power departments interconnect through their local utility instead, so companies focused on those territories show fewer records here. The Solar.com Score is computed from the full text of each company's published customer reviews (star ratings and review counts sourced from Google and Yelp), plus verified public-record track record; it drives the default ranking for scored companies and is never for sale.
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Where solar.com fits in
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See your priceMedian installed price ($/W) - public records$5.30/W
Solar.com base price$2.59/W51% below median
How to read these pricesMedian is self-reported installed cost on owned-system public interconnection records. Solar.com base price is a starting price before site-specific adders (roof complexity, electrical work, etc.); final quotes vary.18established companies ranked in the county
Cities in San Mateo County
6 city guides from the same public-record dataset.FAQ
Who has the best solar company reviews in San Mateo County?
The Solar.com Score column ranks review evidence directly: we read the full text of every published customer review of the county's established installers and score what reviewers actually report, 0-10, across sales integrity, price transparency, communication, timeline reliability, workmanship, and after-install support. Sort the table by Solar.com Score or select companies to compare their reviews side by side.
Who is the best solar company in San Mateo County?
The best company depends on your roof, utility, equipment needs, and whether you want to own the system or use a lease-style agreement. The table ranks scored installers by Solar.com Score, keeps unscored active companies below them, and shows verified San Mateo County interconnection activity beside the score.
How are San Mateo County installers ranked here?
The list includes every company with at least 250 verified San Mateo County installs in CPUC Rule 21 public records through May 2026. Companies with a Solar.com Score are ranked by that score; companies not yet scored show a dash in the rank column and appear below the scored cohort, ordered by recent 2025-26 activity. Every install column is San Mateo County-specific. Acquired brands are combined with their current parent, so SolarCity records count under Tesla Energy and Vivint Solar records count under Sunrun.
What does % leased (TPO) mean?
% leased (TPO) is the share of that installer's recorded systems that appear as third-party owned. It helps you see whether an installer historically skews toward owned systems, leases, or a mix.
How does solar.com pricing compare in San Mateo County?
San Mateo County has a median reported install cost of $5.30/W on owned-system CPUC records. Run your address through solar.com to see direct bids for your home, backed by the Best Price Guarantee.
Does being listed mean solar.com recommends that installer?
No. The public table reports verified installation volume only. The companies that bid on your home are separately vetted before they can compete through solar.com, and nobody can buy public placement here.
How we built this data
Methodology: Counts are residential PV interconnections in investor-owned-utility territory (PG&E, SCE, SDG&E) per CPUC Rule 21 public records through May 2026. Postal and name variants are merged. Municipal utility territory such as LADWP, Glendale, Pasadena, Burbank, Anaheim, and Riverside Public Utilities is not included in those CPUC counts. Counts show recorded installations, not quality ratings. Reported costs are self-reported on owned-system interconnections. No installer can pay for placement.
Who we are: Solar.com is a solar marketplace — we connect homeowners with installers and earn a fee when projects move forward. These rankings and scores are computed from public installation records and published customer reviews. No installer can pay for placement, and no installer — including those we work with — can pay to change a score.