Best solar companies California San Bernardino County Rancho Cucamonga
Verified Rancho Cucamonga 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 Rancho Cucamonga 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 Bernardino County and beyond. See the full San Bernardino County ranking →
| # | Installer | |||||||
|---|---|---|---|---|---|---|---|---|
| 1 | Option One Solar5 recent installs19 verifiedActive since 20170.0% leased | 5 | 19 | 2017 | 0.0% | 9.1 | Get a direct bid | |
| 2 | Hpm Solar6 recent installs16 verifiedActive since 20216.2% leased | 6 | 16 | 2021 | 6.2% | 8.9 | Get a direct bid | |
| 3 | California Solar & Electric0 recent installs10 verifiedActive since 20220.0% leased | 0 | 10 | 2022 | 0.0% | 8.6 | Get a direct bid | |
| 4 | Orange County Contracting Services6 recent installs14 verifiedActive since 20220.0% leased | 6 | 14 | 2022 | 0.0% | 8.4 | Get a direct bid | |
| 5 | Blalock Electric2 recent installs22 verifiedActive since 201813.6% leased | 2 | 22 | 2018 | 13.6% | 8.4 | Get a direct bid | |
| 6 | T & G Roofing And Solar Electric6 recent installs38 verifiedActive since 20170.0% leased | 6 | 38 | 2017 | 0.0% | 8.3 | Get a direct bid | |
| 7 | Solar Optimum Design & Electrical8 recent installs66 verifiedActive since 20151.5% leased | 8 | 66 | 2015 | 1.5% | 8.2 | Get a direct bid | |
| 8 | Powur Home Construction1 recent installs46 verifiedActive since 20222.1% leased | 1 | 46 | 2022 | 2.1% | 8.0 | Get a direct bid | |
| 9 | Pell Solar3 recent installs54 verifiedActive since 20117.4% leased | 3 | 54 | 2011 | 7.4% | 7.9 | Get a direct bid | |
| 10 | Triple Line Solar0 recent installs20 verifiedActive since 201290.0% leased | 0 | 20 | 2012 | 90.0% | 7.9 | Get a direct bid | |
| 11 | Grid Alternatives4 recent installs28 verifiedActive since 201278.6% leased | 4 | 28 | 2012 | 78.6% | 7.8 | Get a direct bid | |
| 12 | Simply Solar5 recent installs44 verifiedActive since 20150.0% leased | 5 | 44 | 2015 | 0.0% | 7.7 | Get a direct bid | |
| 13 | La Solar Group5 recent installs48 verifiedActive since 201320.8% leased | 5 | 48 | 2013 | 20.8% | 7.6 | Get a direct bid | |
| 14 | Rooms Covers N Solar1 recent installs28 verifiedActive since 20180.0% leased | 1 | 28 | 2018 | 0.0% | 7.6 | Get a direct bid | |
| 15 | Current Home5 recent installs65 verifiedActive since 201995.4% leased | 5 | 65 | 2019 | 95.4% | 7.6 | Get a direct bid | |
| 16 | True Power Solar0 recent installs60 verifiedActive since 201315.0% leased | 0 | 60 | 2013 | 15.0% | 7.5 | Get a direct bid | |
| 17 | Sunlux2 recent installs44 verifiedActive since 201811.4% leased | 2 | 44 | 2018 | 11.4% | 7.5 | Get a direct bid | |
| 18 | Nrg Clean Power3 recent installs13 verifiedActive since 20160.0% leased | 3 | 13 | 2016 | 0.0% | 7.4 | Get a direct bid | |
| 19 | Semper Solaris3 recent installs76 verifiedActive since 20152.6% leased | 3 | 76 | 2015 | 2.6% | 7.4 | Get a direct bid | |
| 20 | Nexus Energy Systems1 recent installs15 verifiedActive since 201513.3% leased | 1 | 15 | 2015 | 13.3% | 7.3 | Get a direct bid |
Solar.com Scores are live for 50 of the 82 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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Need the local solar math? The Rancho Cucamonga guide covers utility rates, incentives, and what changes the bid.
Read the Rancho Cucamonga solar guide →The table ranks scored companies by Solar.com Score, computed from customer review evidence and verified track record; 50 companies in this city currently carry a score. Companies not yet scored remain visible below the scored cohort by recent Rancho Cucamonga 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 Rancho Cucamonga 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.
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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.