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Los Angeles County · We serve this area
Solar & Battery Installation in Diamond Bar, CA
Diamond Bar sits on the eastern edge of Los Angeles County, right where LA, Orange, and San Bernardino counties meet — just over the 57 from our Orange County home base. Developed by Transamerica on the old Diamond Bar Ranch starting in 1959 as one of the nation's first master-planned communities, the city is dominated by 1960s–1980s single-family hillside tract homes in Southern California Edison territory, with newer gated enclaves like Willow Heights added in the 2010s.
What going solar looks like in Diamond Bar
Diamond Bar homes are served by Southern California Edison (SCE), and permits run through City of Diamond Bar 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 Diamond Bar 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 Diamond Bar
Solar designed around Diamond Bar
We design and install across Diamond Bar — including The Country (Diamond Bar Country Estates), Diamond Point, Pathfinder, Cimarron Oaks, South Pointe, Willow Heights, and Diamond Ridge.
Climate & energy use
Diamond Bar is well inland at the 57/60 interchange, so summer heat drives heavy afternoon and evening air-conditioning loads that land squarely on SCE's 4–9 p.m. time-of-use peak — exactly the window a battery is designed to cover. The city's hillsides border the undeveloped 5,700-acre Tonner Canyon, and Los Angeles County Fire mails annual defensible-space notices to more than 3,500 Diamond Bar parcels in mapped fire hazard severity zones, so Santa Ana wind events carry real wildfire and SCE Public Safety Power Shutoff exposure that makes solar-plus-battery backup a practical design choice here.
Roofs & housing stock
Because Transamerica began building its master-planned community here in 1959, most of Diamond Bar's housing stock is 1960s–1980s single-family tract homes, typically roofed today in composition shingle or concrete tile, with clay and concrete S-tile common on later hillside phases and custom homes in The Country. On tile roofs we use tile-hook or remove-and-replace mounting at each attachment point rather than drilling through tiles, and on older original roofs we flag re-roof needs before panels go up.
HOA & design review
HOA and architectural review are a fact of life in Diamond Bar: The Country Estates is one of the largest private gated communities in greater Los Angeles with its own architectural review, and South Pointe, Willow Heights, and the Diamond Point club community also have active associations. California's Solar Rights Act limits what any HOA can deny, and we prepare and submit the design-review package as part of every Diamond Bar project.
Diamond Bar by the numbers
26
projects & service calls in Diamond Bar
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.
Diamond Bar savings
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What we install
Our services in Diamond Bar
Why Diamond Bar 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
Diamond Bar solar FAQ
Common questions in Diamond Bar
Yes — we serve Diamond Bar (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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When storage pays under NEM 3.0 — and when it doesn't.
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