Every criterion in this guide, expanded into a working checklist.
2026 Buyer's Guide · Ventura County
Best Solar Companies in
Ventura County
Coastal mornings, hot inland afternoons, and real wildfire-shutoff risk — Ventura County rewards an installer who designs for your specific side of the county. Here's how to judge any of them, including us.
Disclosed bias
This guide is published by OC Solar.
We rank ourselves first — here's exactly why, and how to verify every claim yourself. Our own numbers below link to public sources, and for every competitor we tell you to check their live Google and Yelp profiles instead of trusting stats we wrote down that could go stale. If you'd rather start with someone else's quote, we'll review it for free — no pressure, no obligation.
The criteria
How to judge a Ventura County solar company in 2026
A coastal-to-inland climate split and real wildfire risk mean a 'good' installer in Ventura isn't automatically the right fit in Thousand Oaks — these four factors decide whether a quote actually fits your address.
Designs for coastal vs. inland climate
Marine-layer mornings on the coast and significantly hotter inland summers change both production estimates and battery-sizing decisions. A one-size design across the county is a red flag.
Battery competence for PSPS resilience
Ventura County's inland and foothill communities see real wildfire-driven power shutoffs. A battery here is a resilience purchase as much as a savings one — the installer should explain both.
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.
In-house crews, not a subcontractor chain
When the company that sold the job also employs the people on your roof, accountability has nowhere to hide. Ask who pulls the permit, who installs, and who answers the phone afterward.
Ventura County, actually
Coastal mornings. Inland afternoons.
Every install on this page is a real Southern California roof — not stock photography.
The 2026 list
Ventura County's best solar companies, ranked
One disclosed-bias pick at #1 with receipts, then four real alternatives described neutrally. Every company here is worth a quote — get more than one.
1
OC Solar
That's us — judge accordinglyIrvine-headquartered, founded 2016, serving Ventura, Oxnard, Thousand Oaks, and Simi Valley with in-house crews. Here are the numbers — each one is public, and each one is checkable in under a minute.
4.9★
Google rating
400+ reviews
4.7★
Yelp rating
451 reviews
A+
BBB rating
Accredited profile
5,000+
Projects & service calls
Since 2016
30 days
Median sign-to-install
60-day median to PTO
#1023627
CSLB license
Verify at cslb.ca.gov
Tesla Powerwall Premier Certified · Tesla Solar Roof installer
Coastal and inland system designs, sized for your specific climate
ConsumerAffairs #1 solar company in California
Verify our license at cslb.ca.gov (CSLB #1023627) — and yes, check our live Google and Yelp profiles too.
2
Sespe Power Solutions
A family-run, locally based solar, battery, and EV-charger installer headquartered in Ventura, operating since 2014 with in-house C-10 electricians and a Tesla Certified Installer for Powerwall.
Best for: Buyers who want a small, locally headquartered specialist that handles everything in-house.
We don't publish other companies' ratings or review counts — check their live Google and Yelp profiles before deciding, and visit sespepowersolutions.com directly.
3
Coastal Solar
A Ventura-based, family-owned solar and battery installer with roots dating to 1988, serving Ventura, Oxnard, Camarillo, Ojai, Moorpark, Thousand Oaks, Westlake Village, and Agoura Hills.
Best for: Buyers who want a long-tenured, BBB-accredited local company with hundreds of local installs.
We don't publish other companies' ratings or review counts — check their live Google and Yelp profiles before deciding, and visit coastalsolarventura.com directly.
4
Semper Solaris
A veteran-owned California solar, battery storage, roofing, and HVAC company with a dedicated Simi Valley service page.
Best for: Households that value veteran ownership and want roofing or HVAC bundled with solar.
We don't publish other companies' ratings or review counts — check their live Google and Yelp profiles before deciding, and visit sempersolaris.com directly.
5
NRG Clean Power
A California installer with a dedicated Ventura County service page and decades installing systems for homes and businesses in the greater LA/Ventura region.
Best for: Buyers who want a company with a long operating history across Southern California.
We don't publish other companies' ratings or review counts — check their live Google and Yelp profiles before deciding, and visit nrgcleanpower.com directly.
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
50+
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.
Why Ventura County is different
One county, two climates
Ventura County's coastal-to-inland split changes the production estimate and the battery-backup case depending on which side of the county you live on.
- Coastal Ventura and Oxnard see marine-layer morning cloud cover that typically burns off by late morning, with strong afternoon production. Inland Thousand Oaks and Simi Valley run noticeably hotter in summer, driving heavier AC load.
- Ventura County sits in SCE's wildfire-risk service area. Inland and foothill communities can see Public Safety Power Shutoffs during high-wind, low-humidity fire weather that have lasted several days.
- With NEM 3.0 paying little for exported solar, a battery captures evening-peak savings and provides backup power during a shutoff — a double benefit that's especially relevant in this county's higher fire-risk areas.
Ventura County solar FAQ
Questions homeowners ask before choosing an installer
It depends on whether your home is coastal (Ventura, Oxnard) or inland (Thousand Oaks, Simi Valley) — the climate and battery-backup case differ. OC Solar's verifiable case: a 4.9-star Google rating across 400+ reviews, BBB A+, 6,373 projects & service calls since 2016, and a 30-day median sign-to-install timeline. Sespe Power Solutions, Coastal Solar, Semper Solaris, and NRG Clean Power all maintain a real local Ventura County presence and are worth a quote. Verify every company's current Google and Yelp profiles and CSLB license before deciding.
More 2026 buyer's guides: Best Solar Companies in California · Best Solar Companies in Los Angeles · Best Solar Companies in San Bernardino County
Research like a pro
The guides behind this ranking
The vetting framework, NEM 3.0, and the local-vs-national question — in depth.
2026 statewide cost benchmarks for comparing Ventura County quotes.
What actually differs after install day.
Compare us against anyone on this list.
Get a free estimate from OC Solar, designed for your side of the county — coastal or inland — and put it next to any other quote. We're confident in how that comparison ends.
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Licensed, Bonded & Insured · CSLB #1023627