Best solar companies California San Joaquin County Lathrop
Verified Lathrop 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 Lathrop 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 Joaquin County and beyond. See the full San Joaquin County ranking →
| # | Installer | |||||||
|---|---|---|---|---|---|---|---|---|
| 1 | Senga Energy6 recent installs10 verifiedActive since 201950.0% leased | 6 | 10 | 2019 | 50.0% | 8.4 | Get a direct bid | |
| 2 | Citadel Roofing And Solar365 recent installs381 verifiedActive since 20240.0% leased | 365 | 381 | 2024 | 0.0% | 8.4 | Get a direct bid | |
| 3 | American Array Solar Electric4 recent installs73 verifiedActive since 20160.0% leased | 4 | 73 | 2016 | 0.0% | 8.0 | Get a direct bid | |
| 4 | Master Roofing Solutions16 recent installs16 verifiedActive since 20256.2% leased | 16 | 16 | 2025 | 6.2% | 7.9 | Get a direct bid | |
| 5 | Grid Alternatives10 recent installs81 verifiedActive since 201698.8% leased | 10 | 81 | 2016 | 98.8% | 7.8 | Get a direct bid | |
| 6 | Five Star Solar2 recent installs15 verifiedActive since 20170.0% leased | 2 | 15 | 2017 | 0.0% | 7.7 | Get a direct bid | |
| 7 | Honeys Air & Solar0 recent installs13 verifiedActive since 20160.0% leased | 0 | 13 | 2016 | 0.0% | 7.7 | Get a direct bid | |
| 8 | Synergy 7680 recent installs11 verifiedActive since 20110.0% leased | 0 | 11 | 2011 | 0.0% | 7.6 | Get a direct bid | |
| 9 | Semper Solaris2 recent installs12 verifiedActive since 20178.3% leased | 2 | 12 | 2017 | 8.3% | 7.4 | Get a direct bid | |
| 10 | Nexus Energy Systems4 recent installs12 verifiedActive since 20158.3% leased | 4 | 12 | 2015 | 8.3% | 7.3 | Get a direct bid | |
| 11 | Sunrun250 recent installs1,471 verifiedActive since 201446.5% leased | 250 | 1,471 | 2014 | 46.5% | 6.9 | Get a direct bid | |
| 12 | Lift Energy Construction0 recent installs40 verifiedActive since 202135.0% leased | 0 | 40 | 2021 | 35.0% | 6.9 | Get a direct bid | |
| 13 | Empower Electric Solar2 recent installs43 verifiedActive since 20200.0% leased | 2 | 43 | 2020 | 0.0% | 6.8 | Get a direct bid | |
| 14 | Future Energy0 recent installs14 verifiedActive since 20130.0% leased | 0 | 14 | 2013 | 0.0% | 6.5 | Get a direct bid | |
| 15 | Better Earth Electric2 recent installs12 verifiedActive since 202125.0% leased | 2 | 12 | 2021 | 25.0% | 6.4 | Get a direct bid | |
| 16 | Energy Service Partners2 recent installs20 verifiedActive since 202025.0% leased | 2 | 20 | 2020 | 25.0% | 6.0 | Get a direct bid | |
| 17 | Tesla Energy24 recent installs490 verifiedActive since 201039.0% leased | 24 | 490 | 2010 | 39.0% | 5.5 | Get a direct bid | |
| 18 | Gold Rush Energy Solutions0 recent installs11 verifiedActive since 20200.0% leased | 0 | 11 | 2020 | 0.0% | 5.3 | Get a direct bid | |
| 19 | Infinity Energy0 recent installs34 verifiedActive since 201523.5% leased | 0 | 34 | 2015 | 23.5% | 5.3 | Get a direct bid | |
| 20 | SunPower Corporation7 recent installs376 verifiedActive since 201925.0% leased | 7 | 376 | 2019 | 25.0% | 5.1 | Get a direct bid |
Solar.com Scores are live for 24 of the 30 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; 24 companies in this city currently carry a score. Companies not yet scored remain visible below the scored cohort by recent Lathrop 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 Lathrop 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.