Best solar companies California Santa Clara County Gilroy
Verified Gilroy installs, review-backed Solar.com Scores, and the broader county market in one place. Public data, not paid placement.
What this data covers: counts come from investor-owned-utility interconnection records for Gilroy service addresses. Homes served by municipal utilities interconnect through their city utility instead and do not appear here. Companies with fewer than 10 recorded local installs are not listed; many also build across Santa Clara County and beyond. See the full Santa Clara County ranking →
| # | Installer | |||||||
|---|---|---|---|---|---|---|---|---|
| 1 | Highlight Solar0 recent installs12 verifiedActive since 20140.0% leased | 0 | 12 | 2014 | 0.0% | 8.8 | Get a direct bid | |
| 2 | Cinnamon Energy Systems2 recent installs14 verifiedActive since 20170.0% leased | 2 | 14 | 2017 | 0.0% | 8.7 | Get a direct bid | |
| 3 | Infinium Solar6 recent installs14 verifiedActive since 20190.0% leased | 6 | 14 | 2019 | 0.0% | 8.7 | Get a direct bid | |
| 4 | Allterra Solar2 recent installs11 verifiedActive since 20150.0% leased | 2 | 11 | 2015 | 0.0% | 8.6 | Get a direct bid | |
| 5 | Cobalt Power Systems4 recent installs10 verifiedActive since 20100.0% leased | 4 | 10 | 2010 | 0.0% | 8.5 | Get a direct bid | |
| 6 | Clean Solar1 recent installs50 verifiedActive since 20110.0% leased | 1 | 50 | 2011 | 0.0% | 8.5 | Get a direct bid | |
| 7 | Simmitri2 recent installs59 verifiedActive since 20151.7% leased | 2 | 59 | 2015 | 1.7% | 8.4 | Get a direct bid | |
| 8 | Citadel Roofing And Solar50 recent installs105 verifiedActive since 201958.1% leased | 50 | 105 | 2019 | 58.1% | 8.4 | Get a direct bid | |
| 9 | Solar Technologies0 recent installs38 verifiedActive since 20070.0% leased | 0 | 38 | 2007 | 0.0% | 8.3 | Get a direct bid | |
| 10 | T D Construction3 recent installs37 verifiedActive since 20190.0% leased | 3 | 37 | 2019 | 0.0% | 8.2 | Get a direct bid | |
| 11 | Solar Optimum Design & Electrical2 recent installs21 verifiedActive since 20200.0% leased | 2 | 21 | 2020 | 0.0% | 8.2 | Get a direct bid | |
| 12 | Powur Home Construction1 recent installs12 verifiedActive since 20220.0% leased | 1 | 12 | 2022 | 0.0% | 8.0 | Get a direct bid | |
| 13 | American Array Solar Electric4 recent installs16 verifiedActive since 20200.0% leased | 4 | 16 | 2020 | 0.0% | 8.0 | Get a direct bid | |
| 14 | Grid Alternatives0 recent installs11 verifiedActive since 201372.7% leased | 0 | 11 | 2013 | 72.7% | 7.8 | Get a direct bid | |
| 15 | Nrg Clean Power5 recent installs34 verifiedActive since 20160.0% leased | 5 | 34 | 2016 | 0.0% | 7.4 | Get a direct bid | |
| 16 | Semper Solaris6 recent installs99 verifiedActive since 20141.0% leased | 6 | 99 | 2014 | 1.0% | 7.4 | Get a direct bid | |
| 17 | Nexus Energy Systems3 recent installs69 verifiedActive since 201514.5% leased | 3 | 69 | 2015 | 14.5% | 7.3 | Get a direct bid | |
| 18 | Poco Solar Energy0 recent installs41 verifiedActive since 20060.0% leased | 0 | 41 | 2006 | 0.0% | 7.2 | Get a direct bid | |
| 19 | Sunternal Construction1 recent installs36 verifiedActive since 20212.8% leased | 1 | 36 | 2021 | 2.8% | 7.0 | Get a direct bid | |
| 20 | Sunrun151 recent installs1,480 verifiedActive since 201373.7% leased | 151 | 1,480 | 2013 | 73.7% | 6.9 | Get a direct bid |
Solar.com Scores are live for 33 of the 50 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.
% 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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The table ranks scored companies by Solar.com Score, computed from customer review evidence and verified track record; 33 companies in this city currently carry a score. Companies not yet scored remain visible below the scored cohort by recent Gilroy install activity. The best company for your home also depends on your roof, utility, and bid, which is why the same companies compete on price through solar.com.
Companies with enough review evidence are ranked by Solar.com Score. Not-yet-scored companies show a dash in the rank column and sit below them, ordered by recent 2025-26 installation activity recorded for Gilroy addresses in CPUC interconnection records. No company can pay for placement.
Where a company clears the 20 analyzed-review floor, its Solar.com Score summarizes substantive customer review texts, weighted by reviewer credibility and recency. Select companies in the table to compare their review scores category by category, from sales integrity to long-term support.
Run your address through solar.com. Vetted installers compete on one identical scope for your home, pricing is locked online, and the Best Price Guarantee backs the winning number in writing.
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.