Best solar companies California Napa County Napa
Verified Napa 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 Napa 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 Napa County and beyond. See the full Napa County ranking →
| # | Installer | |||||||
|---|---|---|---|---|---|---|---|---|
| 1 | Northern Pacific Power Systems18 recent installs90 verifiedActive since 20140.0% leased | 18 | 90 | 2014 | 0.0% | 8.9 | Get a direct bid | |
| 2 | Ambrose Solar27 recent installs185 verifiedActive since 20180.0% leased | 27 | 185 | 2018 | 0.0% | 8.8 | Get a direct bid | |
| 3 | Suntegrity Solar7 recent installs81 verifiedActive since 20102.5% leased | 7 | 81 | 2010 | 2.5% | 8.7 | Get a direct bid | |
| 4 | West Coast Solar3 recent installs23 verifiedActive since 20110.0% leased | 3 | 23 | 2011 | 0.0% | 8.6 | Get a direct bid | |
| 5 | Sun First!0 recent installs36 verifiedActive since 20020.0% leased | 0 | 36 | 2002 | 0.0% | 8.4 | Get a direct bid | |
| 6 | Citadel Roofing And Solar59 recent installs194 verifiedActive since 20170.0% leased | 59 | 194 | 2017 | 0.0% | 8.4 | Get a direct bid | |
| 7 | Solarcraft Services5 recent installs71 verifiedActive since 20040.0% leased | 5 | 71 | 2004 | 0.0% | 8.2 | Get a direct bid | |
| 8 | Green Stock Solar30 recent installs345 verifiedActive since 20120.0% leased | 30 | 345 | 2012 | 0.0% | 8.2 | Get a direct bid | |
| 9 | Element Electric1 recent installs11 verifiedActive since 20140.0% leased | 1 | 11 | 2014 | 0.0% | 8.2 | Get a direct bid | |
| 10 | Powur Home Construction4 recent installs28 verifiedActive since 202217.8% leased | 4 | 28 | 2022 | 17.8% | 8.0 | Get a direct bid | |
| 11 | Right Now Air1 recent installs11 verifiedActive since 20200.0% leased | 1 | 11 | 2020 | 0.0% | 8.0 | Get a direct bid | |
| 12 | American Array Solar Electric4 recent installs11 verifiedActive since 20210.0% leased | 4 | 11 | 2021 | 0.0% | 8.0 | Get a direct bid | |
| 13 | Ilum Solar0 recent installs13 verifiedActive since 20180.0% leased | 0 | 13 | 2018 | 0.0% | 7.9 | Get a direct bid | |
| 14 | Diablo Solar Services2 recent installs39 verifiedActive since 20060.0% leased | 2 | 39 | 2006 | 0.0% | 7.9 | Get a direct bid | |
| 15 | Summit Technology Group0 recent installs18 verifiedActive since 20120.0% leased | 0 | 18 | 2012 | 0.0% | 7.8 | Get a direct bid | |
| 16 | North Valley16 recent installs26 verifiedActive since 202380.8% leased | 16 | 26 | 2023 | 80.8% | 7.8 | Get a direct bid | |
| 17 | Simply Solar8 recent installs62 verifiedActive since 20150.0% leased | 8 | 62 | 2015 | 0.0% | 7.7 | Get a direct bid | |
| 18 | Hooked On Solar5 recent installs66 verifiedActive since 20167.6% leased | 5 | 66 | 2016 | 7.6% | 7.5 | Get a direct bid | |
| 19 | Nrg Clean Power8 recent installs32 verifiedActive since 20160.0% leased | 8 | 32 | 2016 | 0.0% | 7.4 | Get a direct bid | |
| 20 | Semper Solaris13 recent installs84 verifiedActive since 20161.2% leased | 13 | 84 | 2016 | 1.2% | 7.4 | Get a direct bid |
Solar.com Scores are live for 39 of the 63 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; 39 companies in this city currently carry a score. Companies not yet scored remain visible below the scored cohort by recent Napa 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 Napa 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.