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Fullerton
(855) 502-6363
★★★★★ 5.0 — 2,500+ Google Reviews
Expert Solar Installation in Fullerton, CA
Harness warm inland sunshine and start saving with Option One Solar — Orange County's trusted solar installer since 1970. Home to Cal State Fullerton and a thriving arts scene, Fullerton attracts forward-thinking residents who recognize that solar is one of the smartest long-term financial decisions an Orange County homeowner can make. Residential and commercial solar, battery storage, and full EPC services from a licensed local team.
54+ Years
Experience
2,500+
Installs
5-stars
Rated
Our Services
Complete Solar Services for Fullerton Homes & Businesses
Every service you need to go solar in Fullerton — design, installation, storage, and ongoing support.
Residential Solar Installation
From single-family homes to multi-unit properties, we design and install solar systems tailored to each Fullerton home. Take advantage of 276+ annual sunny days and start reducing your monthly SCE costs significantly.
Commercial Solar Solutions
Our licensed team delivers scalable solar for Fullerton businesses — full EPC from design to commissioning. We help commercial clients reduce overhead, achieve sustainability targets, and maximize the federal Investment Tax Credit.
Solar Battery Storage
Pair your solar system with a Tesla Powerwall or commercial-grade BESS for energy independence. In Fullerton's warm inland Mediterranean climate with good sunshine and mild winters, battery backup isn't a luxury — it's the smartest upgrade you can add to a solar installation.
System Monitoring & Maintenance
Real-time monitoring keeps you informed about your system's performance 24/7. Our local Orange County team handles maintenance and repairs quickly, so your investment stays at peak output year after year.
Solar Consulting & Design
Our engineers perform a thorough analysis of your Fullerton property — roof condition, orientation, shading, and local SCE rate structure — to design a system that delivers the best possible return on your investment.
Full EPC Services
We handle everything from structural engineering to City of Fullerton building permits and SCE interconnection agreements. Our EPC capability means a single point of accountability from contract signing to system activation.
Free Consultation
Start Saving — Free Fullerton Solar Estimate
No pressure, no guesswork. We start with your Fullerton property and SCE bills, and finish with a transparent proposal showing exactly how much you'll save and how quickly your system pays for itself.
Detailed property and shading assessment
Custom system design with production estimates
Transparent pricing with financing options
Federal tax credit and incentive guidance
No obligation — no pressure
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(855) 502-6363
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Our Community
Rooted in Orange County, Serving Fullerton
Option One Solar has been serving Southern California communities like Fullerton since 1970. While our headquarters is in Apple Valley, our crews, project managers, and service technicians work throughout Orange County every day — and we treat every Fullerton customer like a neighbor. When you work with us, you're not getting a call center; you're getting a dedicated team that knows your area. Fullerton's educated, environmentally aware community and consistent sunshine have made it a rising solar market in North Orange County. That's why we take the time to design every system specifically for local conditions — sun angles, utility rate structures, and City of Fullerton permitting requirements — rather than applying a one-size-fits-all approach. From a single residential rooftop to a multi-acre commercial installation, our licensed C-10 and C-46 team has the credentials and capacity to deliver. Every project comes backed by our 25-year warranty and ongoing local support.
How It Works
Our Simple Solar Process in Fullerton
Going solar in Fullerton doesn't have to be complicated. Here's exactly how our process works, from first call to first kilowatt.
Free Site Assessment & Energy Review
We start by reviewing your Fullerton property and SCE energy bills together. Our team evaluates your roof condition, orientation, and any shading from nearby structures, then combines that with your actual monthly usage — so every recommendation we make is grounded in real data for your specific situation.
Custom System Design for Fullerton
Using your site data and Orange County's reliable year-round sunshine, our engineers design a system sized and positioned specifically for your property. We model annual production estimates, calculate your payback period, and present a fully transparent proposal with no surprises and no pressure.
Permits, Installation & SCE Interconnection
Our licensed C-10 and C-46 crews handle every detail — pulling permits with City of Fullerton, scheduling inspections, installing your system to code, and filing your SCE interconnection agreement. You stay informed at every milestone without managing any of it yourself.
System Activation & Ongoing Local Support
Once SCE approves your interconnection, we commission your system and walk you through monitoring your production in real time. Our team remains your local resource for any questions, maintenance, or service needs for the full life of your installation, backed by a 25-year warranty.
Why Choose Us
The Option One Solar Difference in Fullerton
From credentials to customer service, here's what makes Option One Solar the right choice for Fullerton.
54+ Years of Experience
Founded in 1970, Option One Solar brings over five decades of expertise to every Fullerton project. Three generations of experience means your installation is in proven, capable hands.
C-10 & C-46 Licensed
We hold both California C-10 (Electrical) and C-46 (Solar) contractor licenses — the dual credentials required to handle any solar project in Fullerton, residential or commercial.
25-Year Warranty
Every Fullerton installation is backed by our comprehensive 25-year warranty covering equipment, workmanship, and system performance. Your investment is protected for decades.
Local Orange County Experts
Our crews and project managers work throughout Orange County every day. We understand the local climate, SCE rate structures, and City of Fullerton permitting process inside and out.
5-Star Rated
With over 2,500 five-star reviews from homeowners and businesses across Southern California, our track record speaks clearly. Fullerton customers consistently rate us at the top of the industry.
Flexible Financing
We offer solar loans, leases, and power purchase agreements to fit any budget. Our team will identify the financing structure that maximizes your savings from day one in Fullerton.
FAQ
Solar Installation FAQ for Fullerton Homeowners
Honest answers to the most common solar questions we hear from Fullerton customers.
Service Areas
Also Serving Nearby Communities
In addition to Apple Valley, Option One Solar proudly serves homes and businesses throughout the High Desert and Inland Empire.
Get Started
Ready to go Solar in Fullerton?
Take the first step toward energy independence. Whether you are protecting your home from rising SCE rates or powering your business with clean energy, our Fullerton team is ready to help.