Every criterion in this guide, expanded into a working checklist.
2026 Buyer's Guide · San Bernardino County
Best Solar Companies in
San Bernardino County
Extreme Inland Empire heat changes what 'good equipment' means. Here's how to judge any installer from Ontario to Fontana — including how to check our own claims.
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 San Bernardino County solar company in 2026
Extreme heat, fragmented city-by-city permitting, and NEM 3.0 mean the right installer here proves it with real local experience, not a statewide brochure.
Heat-rated equipment and design
Inland Empire summers regularly exceed 100°F. A good installer accounts for the real-world derating effect of extreme heat on panel and battery output, not just a spec-sheet number.
NEM 3.0 and battery competence
Under NEM 3.0, savings come from storing and self-consuming your own power during peak hours. A solar-only quote here is running on outdated economics.
Local permitting experience
Ontario, Rancho Cucamonga, Fontana, and San Bernardino each run their own building department and permitting platform. Crews that permit in your specific city move faster.
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 — anyone promising a personal 30% credit on a 2026 purchase fails this test instantly.
San Bernardino County, actually
290+ sunny days. Heat that punishes bad equipment.
Every install on this page is a real Southern California roof — not stock photography.
The 2026 list
San Bernardino County's best solar companies, ranked
One disclosed-bias pick at #1 with receipts, then five 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 Ontario, Rancho Cucamonga, Fontana, and San Bernardino 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
Heat-rated equipment selection for Inland Empire summers
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
Solar Optimum
A multi-time EnergySage National Installer of the Year with a dedicated Inland Empire branch office, offering solar, battery storage, and roofing.
Best for: Homeowners who want a regional installer with national-award recognition.
We don't publish other companies' ratings or review counts — check their live Google and Yelp profiles before deciding, and visit solaroptimum.com directly.
3
Semper Solaris
A veteran-owned California company with a dedicated Inland Empire office offering solar, battery storage, roofing, and HVAC.
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.
4
Baker Electric Home Energy
A San Diego-founded (1938) electrical and solar contractor explicitly listing San Bernardino County coverage, including Ontario, Rancho Cucamonga, Fontana, and the city of San Bernardino.
Best for: Buyers who value a long-tenured, family-run electrical contractor.
We don't publish other companies' ratings or review counts — check their live Google and Yelp profiles before deciding, and visit bakerhomeenergy.com directly.
5
NRG Clean Power
A statewide installer with a dedicated San Bernardino County landing page and listed coverage in Fontana, Ontario, and Rancho Cucamonga.
Best for: Buyers who want a California company with a long operating history.
We don't publish other companies' ratings or review counts — check their live Google and Yelp profiles before deciding, and visit nrgcleanpower.com directly.
6
Sunrun
A national residential solar and battery company, built primarily around lease and PPA financing, with an active local presence in San Bernardino.
Best for: Homeowners who specifically want a lease or PPA from a large national provider.
We don't publish other companies' ratings or review counts — check their live Google and Yelp profiles before deciding, and visit sunrun.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 San Bernardino County is different
Heat that tests every component
Over 290 sunny days a year is great for production — but the same heat that makes Inland Empire solar attractive also stresses equipment harder than coastal climates do.
- Summer highs commonly run 95–104°F, occasionally hotter. Extreme heat can reduce panel output roughly 10–15% versus optimal temperature, which is why panel temperature coefficient and inverter/battery thermal management matter more here.
- SCE territory operates under NEM 3.0, which pays little for exported solar — a battery that lets you self-consume during the evening peak is central to the savings, not optional.
- Foothill and wildland-urban-interface communities fall into SCE's higher fire-risk zones and can see Public Safety Power Shutoffs — added reason for battery backup in those specific areas.
San Bernardino County solar FAQ
Questions homeowners ask before choosing an installer
There's no single answer for every home in Ontario, Rancho Cucamonga, Fontana, and San Bernardino — but there's a reliable method. 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. Solar Optimum, Semper Solaris, Baker Electric Home Energy, NRG Clean Power, and Sunrun all maintain a real local Inland Empire 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 Riverside County · Best Solar Companies in Ventura 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 Inland Empire quotes.
What actually differs after install day.
Compare us against anyone on this list.
Get a free estimate from OC Solar, modeled on your actual roof and Inland Empire heat, 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