Best solar companies California Contra Costa County Antioch
Verified Antioch 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 Antioch 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 Contra Costa County and beyond. See the full Contra Costa County ranking →
| # | Installer | |||||||
|---|---|---|---|---|---|---|---|---|
| 1 | Kingdom Solar0 recent installs23 verifiedActive since 20180.0% leased | 0 | 23 | 2018 | 0.0% | 8.8 | Get a direct bid | |
| 2 | Ambrose Solar9 recent installs35 verifiedActive since 20180.0% leased | 9 | 35 | 2018 | 0.0% | 8.8 | Get a direct bid | |
| 3 | Got Watts Electric & Solar2 recent installs17 verifiedActive since 20180.0% leased | 2 | 17 | 2018 | 0.0% | 8.8 | Get a direct bid | |
| 4 | Sol R Us Electrical0 recent installs27 verifiedActive since 20180.0% leased | 0 | 27 | 2018 | 0.0% | 8.7 | Get a direct bid | |
| 5 | West Coast Solar7 recent installs239 verifiedActive since 20110.8% leased | 7 | 239 | 2011 | 0.8% | 8.6 | Get a direct bid | |
| 6 | United Solar Electric9 recent installs30 verifiedActive since 20200.0% leased | 9 | 30 | 2020 | 0.0% | 8.4 | Get a direct bid | |
| 7 | Senga Energy5 recent installs26 verifiedActive since 202076.9% leased | 5 | 26 | 2020 | 76.9% | 8.4 | Get a direct bid | |
| 8 | Citadel Roofing And Solar97 recent installs638 verifiedActive since 20190.0% leased | 97 | 638 | 2019 | 0.0% | 8.4 | Get a direct bid | |
| 9 | Your Energy Solutions2 recent installs19 verifiedActive since 20140.0% leased | 2 | 19 | 2014 | 0.0% | 8.3 | Get a direct bid | |
| 10 | Clear Day Energy7 recent installs73 verifiedActive since 20150.0% leased | 7 | 73 | 2015 | 0.0% | 8.2 | Get a direct bid | |
| 11 | Solar Optimum Design & Electrical6 recent installs36 verifiedActive since 20200.0% leased | 6 | 36 | 2020 | 0.0% | 8.2 | Get a direct bid | |
| 12 | Element Power Systems0 recent installs42 verifiedActive since 20130.0% leased | 0 | 42 | 2013 | 0.0% | 8.1 | Get a direct bid | |
| 13 | Powur Home Construction3 recent installs37 verifiedActive since 20228.1% leased | 3 | 37 | 2022 | 8.1% | 8.0 | Get a direct bid | |
| 14 | American Array Solar Electric1 recent installs194 verifiedActive since 20150.0% leased | 1 | 194 | 2015 | 0.0% | 8.0 | Get a direct bid | |
| 15 | Ilum Solar1 recent installs26 verifiedActive since 20180.0% leased | 1 | 26 | 2018 | 0.0% | 7.9 | Get a direct bid | |
| 16 | Diablo Solar Services2 recent installs60 verifiedActive since 20050.0% leased | 2 | 60 | 2005 | 0.0% | 7.9 | Get a direct bid | |
| 17 | Sky Power Systems0 recent installs15 verifiedActive since 20110.0% leased | 0 | 15 | 2011 | 0.0% | 7.9 | Get a direct bid | |
| 18 | Calpro Solar0 recent installs15 verifiedActive since 20196.7% leased | 0 | 15 | 2019 | 6.7% | 7.9 | Get a direct bid | |
| 19 | All On Electric4 recent installs39 verifiedActive since 20152.6% leased | 4 | 39 | 2015 | 2.6% | 7.8 | Get a direct bid | |
| 20 | Grid Alternatives8 recent installs40 verifiedActive since 200872.5% leased | 8 | 40 | 2008 | 72.5% | 7.8 | Get a direct bid |
Solar.com Scores are live for 55 of the 89 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; 55 companies in this city currently carry a score. Companies not yet scored remain visible below the scored cohort by recent Antioch 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 Antioch 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.