Best solar companies in Southern California →
The region-wide guide — how the six criteria play out across SCE, SDG&E, and LADWP territory, with the county-line differences that change the answer.
Start here if you're comparing across county lines.
2026 buyer's guide
Best Solar Companies
in California
There's no single best solar company for a state this big — but there is a best method for finding yours. Six verifiable criteria, region-by-region guides for every SoCal county we serve, and a way to check every claim without trusting anyone's list. Including ours.
Full transparency
Updated June 2026
This guide is published by OC Solar. We're a California solar contractor, so read accordingly: this page teaches the evaluation method and links our regional guides — it doesn't publish other companies' ratings, review counts, or prices, because those drift and stale numbers mislead. Our own figures below link to public sources you can check in under a minute, starting with our reviews across every platform.
The criteria
How to judge any California solar company in 2026
The rules changed: the residential federal tax credit is gone, NEM 3.0 rewrote the savings math, and review profiles drift monthly. These six criteria are how we'd evaluate any installer — including ourselves.
Current rating AND review volume
A 5.0 from a dozen reviews is a coin flip; a high rating across hundreds is a track record. Check both numbers on Google and Yelp, and read each company's most recent reviews — the last 90 days tells you more than the lifetime average.
NEM 3.0 and battery competence
Under NEM 3.0, savings come from storing and self-consuming your own power, not exporting it. Any installer who quotes solar-only without explaining the battery math is selling outdated economics — in every utility territory in the state.
Financing honesty — including §48E
The residential federal credit expired at the end of 2025. The surviving commercial §48E credit works only on lease, PPA, or prepaid plans: the financier claims it and passes roughly 30% of the value through as a lower price, through about 2027. A good company explains this as a price benefit — anyone promising you a personal 30% credit on a 2026 purchase fails instantly.
License and insurance you can verify
Look every contractor up at cslb.ca.gov: active license, current bond, workers' compensation on file, and a legal entity that matches the contract in front of you. Thirty seconds of checking beats years of regret.
Install speed, in writing
The statewide gap between signing and a working system can stretch for months. Ask for the company's median sign-to-install timeline and whether they'll commit to it in your contract. Vague answers here predict a vague timeline later.
Who services the system afterward
Panels carry 25-year warranties; plenty of installers don't last five. Ask who answers the phone in year 7 — an in-house local service team, or a call center routing tickets to whichever subcontractor is available that week.
California, county by county
Solar vetting is local.
Utilities, permit offices, and rate structures differ by county — pick the guide for where you live.
Pick your region
The 2026 guides, region by region
Each regional guide applies the criteria above where you actually live — with real alternatives named.
Best solar companies in Orange County →
Where OC Solar is headquartered — the county guide names real alternatives, ranks with receipts, and shows how to check every claim.
SCE and SDG&E territory; battery-first design is the 2026 default.
Best solar companies in Los Angeles →
LA adds a wrinkle the rest of the state doesn't have: LADWP municipal rules vs. SCE's NEM 3.0. The LA guide covers how that changes the vetting.
Confirm which utility your home is on before comparing any quotes.
Best solar companies in San Diego →
SDG&E charges some of the highest residential rates in the country, which makes battery design competence the deciding factor in San Diego.
The SD guide explains why storage math separates the finalists.
Best solar companies in Riverside County →
From Temecula to Palm Springs, desert heat drives some of the heaviest AC loads in the state — the Riverside guide covers what that does to system sizing.
Mostly SCE territory, with a municipal utility inside the city of Riverside.
Best solar companies in San Bernardino County →
The Inland Empire's extreme summer heat and rapid new-home growth make installer capacity and battery design the questions that matter most.
SCE territory across Ontario, Rancho Cucamonga, Fontana, and San Bernardino.
Best solar companies in Ventura County →
A coastal-to-inland climate split and real wildfire/PSPS exposure make battery backup a bigger consideration here than in most SoCal counties.
SCE territory across Ventura, Oxnard, Thousand Oaks, and Simi Valley.
Powerwall Premier Certified InstallerTesla · OngoingTesla Pro Council — 1 of 12 installersTesla · Ongoing
Solar Roof Premier Certified InstallerTesla · OngoingResidential Installer of the Year — Southern CaliforniaPanasonic · 2024Residential Installer of the Year — Southern CaliforniaPanasonic · 2023Top Residential Installer of the Year — Southern CaliforniaPanasonic · 2022Best of HouzzHouzz · 2022
Top Solar ContractorSolar Power World · 2024Top Solar Contractor — #203 nationallySolar Power World · 2025Entrepreneur Of The Year — Pacific Southwest FinalistEY (Ernst & Young) · 2025Excellence in Entrepreneurship AwardOrange County Business Journal · 2026Super Service AwardAngi · 2024 & 2025
Angi Pro Council — memberAngi · Since 2023
#1 Solar Company in CaliforniaConsumerAffairs · 2026Buyer's Choice Award — Best Equipment & Best InstallationConsumerAffairs (national) · 2026A+ Accredited BusinessBetter Business Bureau · Since 2017Official Solar Partner of the Anaheim DucksAnaheim Ducks (NHL) — partnership · OngoingCertified & recognized by
6,373+
Projects & service calls
by in-house crews
10
Years serving SoCal
Founded 2016
30+
MW installed
across Southern California
4.9★
Google rating
400+ reviews · BBB A+
Manufacturer certifications
1 of 12 installers- EnphaseInstaller NetworkStorage-certified · IQ Battery
- QcellsQ.PARTNERAuthorized installer
- RECCertified Solar ProfessionalProTrust warranty program
- SolarEdgeCertified Installer
- Owens CorningRoofing Preferred Contractor
Awards & recognition
2024- Solar Power WorldTop Solar Contractor2025#203 nationally
- PanasonicTop Residential Installer of the Year2023Southern California
- EY (Ernst & Young)Entrepreneur Of The Year — Finalist2025Pacific Southwest
- Orange County Business JournalExcellence in Entrepreneurship Award2026
- HouzzBest of Houzz2022
- AngiSuper Service Award2024
#1 in California2026- Best Equipment2026
- Best Installation2026
Ratings, license & partnership
Since 2017- Yelp4.7★ rating451 reviews
- Google4.9★ rating400+ reviews
- CSLBLicense #1023627Licensed · Bonded · Insured
Team partnership
CSLB License #1023627 · Licensed, bonded & insured · Orange County Solar, Contracting Services Inc.
Where we fit
OC Solar's numbers — public, and checkable
We're an Irvine-headquartered contractor serving Southern California with in-house crews. Judge us by the same six criteria: here is every number, each one verifiable at the source.
Verify our license at cslb.ca.gov (CSLB #1023627) — and check our live Google and Yelp profiles too.
Questions
Choosing a California solar company: FAQs
No single company is best for every home in a state with three major utilities, dozens of municipal ones, and wildly different roofs — so distrust any list that pretends otherwise. The honest answer is a method: compare each company's current rating AND review volume on Google and Yelp (read the most recent reviews, not the pinned ones), verify the CSLB license is active and bonded at cslb.ca.gov, and make every bidder show the battery math behind their NEM 3.0 savings projection. This guide is published by OC Solar — our own checkable marks are a 4.9★ Google rating across 400+ reviews, a BBB A+ rating, 6,373 projects & service calls since 2016, and CSLB #1023627 — and we'd rather you verify all of it than take our word.
Research like a pro
The guides behind this framework
The vetting checklist, the statewide cost picture, and the local-vs-national question — in depth.
Every criterion on this page, expanded into a working checklist.
2026 statewide cost benchmarks to hold any quote against.
What actually differs after install day.
Compare us against anyone in the state.
Get a free estimate from OC Solar, put it next to any other quote, and verify every number we've published. We wrote the method because we're confident in how the comparison ends.
Already a customer? Refer a friend & get $500 · See all OC Solar reviews
Licensed, Bonded & Insured · CSLB #1023627