Best solar companies California San Diego County El Cajon
Verified El Cajon 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 El Cajon 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 San Diego County and beyond. See the full San Diego County ranking →
| # | Installer | |||||||
|---|---|---|---|---|---|---|---|---|
| 1 | Aloha Solar Power12 recent installs31 verifiedActive since 20210.0% leased | 12 | 31 | 2021 | 0.0% | 9.2 | Get a direct bid | |
| 2 | New Day Solar1 recent installs38 verifiedActive since 20120.0% leased | 1 | 38 | 2012 | 0.0% | 9.1 | Get a direct bid | |
| 3 | Cosmic Solar1 recent installs16 verifiedActive since 20130.0% leased | 1 | 16 | 2013 | 0.0% | 9.0 | Get a direct bid | |
| 4 | Stellar Solar11 recent installs265 verifiedActive since 20061.5% leased | 11 | 265 | 2006 | 1.5% | 8.9 | Get a direct bid | |
| 5 | Global Solar Electric14 recent installs73 verifiedActive since 20192.7% leased | 14 | 73 | 2019 | 2.7% | 8.8 | Get a direct bid | |
| 6 | Sunline Energy5 recent installs133 verifiedActive since 20130.0% leased | 5 | 133 | 2013 | 0.0% | 8.7 | Get a direct bid | |
| 7 | Jamar Power System1 recent installs106 verifiedActive since 20090.9% leased | 1 | 106 | 2009 | 0.9% | 8.6 | Get a direct bid | |
| 8 | West Coast Solar5 recent installs90 verifiedActive since 20100.0% leased | 5 | 90 | 2010 | 0.0% | 8.6 | Get a direct bid | |
| 9 | Alltech Solar2 recent installs27 verifiedActive since 20160.0% leased | 2 | 27 | 2016 | 0.0% | 8.6 | Get a direct bid | |
| 10 | Alive Industries3 recent installs16 verifiedActive since 20170.0% leased | 3 | 16 | 2017 | 0.0% | 8.5 | Get a direct bid | |
| 11 | Wave Electric Energy2 recent installs39 verifiedActive since 20200.0% leased | 2 | 39 | 2020 | 0.0% | 8.5 | Get a direct bid | |
| 12 | Blalock Electric13 recent installs177 verifiedActive since 20153.4% leased | 13 | 177 | 2015 | 3.4% | 8.4 | Get a direct bid | |
| 13 | Raneri And Long5 recent installs76 verifiedActive since 20150.0% leased | 5 | 76 | 2015 | 0.0% | 8.4 | Get a direct bid | |
| 14 | New Leaf Electric2 recent installs19 verifiedActive since 20170.0% leased | 2 | 19 | 2017 | 0.0% | 8.3 | Get a direct bid | |
| 15 | G C Electric-solar1 recent installs25 verifiedActive since 20150.0% leased | 1 | 25 | 2015 | 0.0% | 8.3 | Get a direct bid | |
| 16 | Unique Solar1 recent installs20 verifiedActive since 20140.0% leased | 1 | 20 | 2014 | 0.0% | 8.3 | Get a direct bid | |
| 17 | Heck Electric1 recent installs11 verifiedActive since 20150.0% leased | 1 | 11 | 2015 | 0.0% | 8.3 | Get a direct bid | |
| 18 | Perksolar2 recent installs67 verifiedActive since 20130.0% leased | 2 | 67 | 2013 | 0.0% | 8.3 | Get a direct bid | |
| 19 | Sunlight Solar2 recent installs117 verifiedActive since 20150.0% leased | 2 | 117 | 2015 | 0.0% | 8.2 | Get a direct bid | |
| 20 | Homegrown Energy Solutions2 recent installs13 verifiedActive since 20160.0% leased | 2 | 13 | 2016 | 0.0% | 8.2 | Get a direct bid |
Solar.com Scores are live for 54 of the 100 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; 54 companies in this city currently carry a score. Companies not yet scored remain visible below the scored cohort by recent El Cajon 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 El Cajon 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.