Best solar companies California Sonoma County Windsor
Verified Windsor 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 Windsor 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 Sonoma County and beyond. See the full Sonoma County ranking →
| # | Installer | |||||||
|---|---|---|---|---|---|---|---|---|
| 1 | Northern Pacific Power Systems23 recent installs128 verifiedActive since 20100.0% leased | 23 | 128 | 2010 | 0.0% | 8.9 | Get a direct bid | |
| 2 | Suntegrity Solar2 recent installs32 verifiedActive since 20143.1% leased | 2 | 32 | 2014 | 3.1% | 8.7 | Get a direct bid | |
| 3 | West Coast Solar2 recent installs10 verifiedActive since 20120.0% leased | 2 | 10 | 2012 | 0.0% | 8.6 | Get a direct bid | |
| 4 | Synergy Solar & Electrical Systems1 recent installs12 verifiedActive since 20120.0% leased | 1 | 12 | 2012 | 0.0% | 8.5 | Get a direct bid | |
| 5 | Citadel Roofing And Solar0 recent installs15 verifiedActive since 20200.0% leased | 0 | 15 | 2020 | 0.0% | 8.4 | Get a direct bid | |
| 6 | Solar Works1 recent installs22 verifiedActive since 20040.0% leased | 1 | 22 | 2004 | 0.0% | 8.3 | Get a direct bid | |
| 7 | Solarcraft Services3 recent installs21 verifiedActive since 20090.0% leased | 3 | 21 | 2009 | 0.0% | 8.2 | Get a direct bid | |
| 8 | Pure Power Solutions5 recent installs26 verifiedActive since 20130.0% leased | 5 | 26 | 2013 | 0.0% | 8.2 | Get a direct bid | |
| 9 | Sunrise Solar0 recent installs16 verifiedActive since 20130.0% leased | 0 | 16 | 2013 | 0.0% | 8.2 | Get a direct bid | |
| 10 | Grid Alternatives0 recent installs16 verifiedActive since 201425.0% leased | 0 | 16 | 2014 | 25.0% | 7.8 | Get a direct bid | |
| 11 | Simply Solar8 recent installs105 verifiedActive since 20150.0% leased | 8 | 105 | 2015 | 0.0% | 7.7 | Get a direct bid | |
| 12 | Sunrun79 recent installs489 verifiedActive since 201365.8% leased | 79 | 489 | 2013 | 65.8% | 6.9 | Get a direct bid | |
| 13 | Better Earth Electric1 recent installs44 verifiedActive since 20214.5% leased | 1 | 44 | 2021 | 4.5% | 6.4 | Get a direct bid | |
| 14 | American Solar0 recent installs10 verifiedActive since 20130.0% leased | 0 | 10 | 2013 | 0.0% | 6.2 | Get a direct bid | |
| 15 | High Definition Solar1 recent installs10 verifiedActive since 20150.0% leased | 1 | 10 | 2015 | 0.0% | 5.9 | Get a direct bid | |
| 16 | Syntrol Solar0 recent installs23 verifiedActive since 2015100.0% leased | 0 | 23 | 2015 | 100.0% | 5.5 | Get a direct bid | |
| 17 | Tesla Energy10 recent installs247 verifiedActive since 200920.6% leased | 10 | 247 | 2009 | 20.6% | 5.5 | Get a direct bid | |
| 18 | SunPower Corporation1 recent installs50 verifiedActive since 20164.0% leased | 1 | 50 | 2016 | 4.0% | 5.1 | Get a direct bid | |
| 19 | Freedom Forever2 recent installs45 verifiedActive since 201937.8% leased | 2 | 45 | 2019 | 37.8% | 4.3 | Get a direct bid | |
| — | Bright Planet10 recent installs24 verifiedActive since 202175.0% leased | 10 | 24 | 2021 | 75.0% | Not yet scored | Get a direct bid |
Solar.com Scores are live for 19 of the 28 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; 19 companies in this city currently carry a score. Companies not yet scored remain visible below the scored cohort by recent Windsor 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 Windsor 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.