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Powering California Homes & Businesses with Solar.
From rooftop residential systems to MW-scale commercial solar and energy storage — Option One Solar is the full-service EPC partner built for projects of every size.
54+
Years in Business
2,500+
Residential Installs
C-10 & C-46
Licensed Contractor
MW-Scale
EPC Capability
25-Year
Warranty
Our Solutions
Solar Solutions for Every Scale
Whether you're a homeowner looking to cut energy costs or a business planning a large-scale solar installation, we have the expertise to deliver.
Take control of your energy costs. With rising utility rates and a 30% federal tax credit still available, there's never been a better time to go solar. We've helped over 2,500 California homeowners lock in savings and gain energy independence.
Save thousands annually on electricity
Battery backup for outage protection
25-year warranty and local support
Financing options available
Reduce operating costs and meet sustainability goals with MW-scale solar and energy storage solutions. As a licensed C-10 & C-46 EPC contractor, we design, build, and commission commercial systems from ground-mount arrays to rooftop and carport installations.
MW-scale solar PV and BESS projects
Full EPC: design, engineering, procurement, construction
Ground-mount, rooftop, and carport installations
Utility interconnection and permitting management
Why Option One Solar
Why California Trusts Option One Solar
Whether you're a homeowner looking to cut energy costs or a business planning a large-scale solar installation, we have the expertise to deliver.
Over five decades of electrical experience to thousands of solar installations across residential and commercial projects. Our experience means fewer surprises and better outcomes — whether it's a 10kW home system or a multi-MW commercial array.
We handle every phase in-house — design, engineering, procurement, permitting, construction, and interconnection. One team, one point of accountability, from first meeting to final commissioning.
From Tesla Powerwall home batteries to large-scale BESS for commercial demand management, we design storage solutions that maximize your investment and protect against outages.
We're not a national chain or a call center. Our team is based right here in Southern California, and we stand behind every system with a 25-year warranty and dedicated support.
How It Works
Getting Started Is Simple — For Any Size Project
Whether it's a home rooftop system or a multi-acre commercial installation, our process is designed to be seamless from start to finish.
Tell us about your goals. Whether you're a homeowner looking to cut your utility bill or a business planning a large-scale installation, we start with a thorough site assessment and energy analysis.
Our engineering team designs a system optimized for your property — from residential rooftop layouts to commercial ground-mount and carport arrays. Every design is tailored for maximum performance and ROI.
Our licensed crews handle construction, permitting, inspections, and utility interconnection. We manage the entire process so you can focus on what matters.
Your system is backed by industry-leading warranties and our local support team. We monitor performance and are here whenever you need us.
Testimonials
Trusted by Homeowners & Businesses Across California
See why our clients — from first-time solar homeowners to commercial property managers — choose Option One Solar.
FAQ
Get Quick Answers to Common Questions
Have questions? We've got answers — for homeowners and businesses alike.