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Los Angeles County · We serve this area
Solar & Battery Installation in Walnut, CA
Walnut is a hillside city in eastern Los Angeles County's San Gabriel Valley, incorporated in 1959, where master-planned neighborhoods built from the 1970s through the 1990s pair generous roof planes with long, inland sun hours. We know the area well — permitting runs through Walnut's own Building & Safety Division, and interconnection goes through Southern California Edison.
What going solar looks like in Walnut
Walnut homes are served by Southern California Edison (SCE), and permits run through City of Walnut Building & Safety Division. We manage both for you. Under NEM 3.0, the smart play here is solar sized to charge a battery, so you run your home on stored solar during the expensive evening peak instead of buying power at top rates.
See how solar works for Southern California Edison customers →
- Permits handled through City of Walnut Building & Safety Division
- Southern California Edison (SCE) interconnection & PTO managed end-to-end
- Custom, roof-first design for your home
- One company for solar, battery, Tesla Solar Roof & HVAC
Local to Walnut
Solar designed around Walnut
We design and install across Walnut — including Snow Creek, Timberline, Walnut Hills, and Cross Keys.
Climate & energy use
Walnut sits well inland in the eastern San Gabriel Valley, on the southern slopes of the San Jose Hills at roughly 560 feet — the coastal marine layer rarely lingers this far east, so summer sun is long and intense, with local record highs reaching into the 110s. That heat rewards panels with strong temperature coefficients, and regional fall Santa Ana wind events make attachment quality and wind-uplift ratings worth attention on exposed hillside lots.
Roofs & housing stock
Most of Walnut was master-planned between the 1970s and 1990s, with single-family homes ranging from roughly 1,800 to over 11,000 square feet. Concrete tile is typical on the 1980s–90s two-story tracts such as Snow Creek, where we mount with tile hooks or comp-out flashing rather than drilling tile, while earlier 1970s tracts like Walnut Hills more often carry composition shingle that allows straightforward flashed attachments.
HOA & design review
Walnut has no citywide master association, and many of its established tracts are HOA-free; some subdivisions and townhome communities do have associations with architectural review. Where an HOA applies, California's Solar Rights Act (Civil Code 714) prevents it from unreasonably restricting your system, and we prepare and submit the architectural package as part of our process.
Walnut by the numbers
20
projects & service calls in Walnut
That's part of the 6,373 projects & service calls OC Solar has handled across Southern California since 2016. Per our company records as of June 2026.
Walnut savings
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What we install
Our services in Walnut
Why Walnut chooses OC Solar
Local crews, verified track record
10+
Years serving SoCal
Founded 2016
50+
MW installed
across Southern California
6,373+
Projects & service calls
by in-house crews
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
Walnut solar FAQ
Common questions in Walnut
Yes — we serve Walnut (Los Angeles County) with solar, battery storage, the Tesla Solar Roof, and HVAC. We serve it from a nearby OC Solar office.
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Solar research for Walnut homeowners
The cost, worth-it, NEM 3.0, and battery guides behind every honest California solar decision.
The honest 2026 worth-it analysis, utility by utility.
The net-billing rules that decide your savings.
When storage pays under NEM 3.0 — and when it doesn't.
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