Best solar companies California Sonoma County Cotati
Every company below has verified installations at Cotati addresses in public utility records. Review scores are computed from every published customer review. Public data, not paid placement.
What this data covers: counts come from investor-owned-utility interconnection records for Cotati service addresses. Homes served by municipal utilities interconnect through their city utility instead and do not appear here. Companies with fewer than 10 recorded Cotati installs are not listed; many also build across Sonoma County and beyond. See the full Sonoma County ranking →
| # | Installer | |||||||
|---|---|---|---|---|---|---|---|---|
| 1 | Sunrun | 16 | 104 | 2014 | 73.1% | 6.6 | Get a direct bid | |
| 2 | Northern Pacific Power Systems | 3 | 18 | 2015 | 0.0% | 8.2 | Get a direct bid | |
| 3 | Tesla Energy | 1 | 42 | 2013 | 31.0% | 6.8 | Get a direct bid | |
| 4 | Freedom Forever | 1 | 12 | 2020 | 8.3% | 6.9 | Get a direct bid | |
| 5 | Citadel Roofing And Solar | 1 | 11 | 2021 | 0.0% | 7.6 | Get a direct bid | |
| 6 | Better Earth Electric | 1 | 10 | 2022 | 0.0% | 6.0 | Get a direct bid | |
| 7 | Sunrun Installation Services | 0 | 18 | 2017 | 66.7% | Not yet scored | Get a direct bid | |
| 8 | Rockin Roofers | 0 | 10 | 2020 | 0.0% | Not yet scored | Get a direct bid |
Solar.com Scores are live for 6 of the 8 ranked companies. Companies marked “Not yet scored” have fewer than 20published reviews 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); it is separate from the install ranking and never for sale.
The table ranks every established company with recorded Cotati installs by recent activity in public utility interconnection records, and 6 of them carry Solar.com Scores computed from every published customer review. 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.
By recent 2025-26 installation activity recorded for Cotati addresses in CPUC interconnection records, with all-time installs as the tiebreak. Review scores are shown alongside but never change the activity ranking, and no company can pay for placement.
Where a company clears the 20-review floor, its Solar.com Score summarizes every published customer review, 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.
Run your address and see direct pricing for Cotati in about two minutes. No sales call required.
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.