Mario Castillo Electric's Clean Energy & Solar Solutions in Long Beach, LA County, Orange County Communities and Surrounding Areas
Discover the power to transform the environment and your home and business with Mario Castillo Electric's clean energy and solar services offered in LA County, Long Beach and throughout Orange County communities. We are proud to offer a wave of renewable energy solutions including solar energy consulting, assessment, customized panel and battery setups, and seamless installation. In addition to implementation we offer ongoing maintenance, monitoring and system troubleshooting. With California's groundbreaking NEM 3.0 policy leading the charge towards a cleaner, greener future, it's time to reimagine our energy grid. Let's brighten the future together.
Get a Quote today by filling out the form on this page. Learn how our inspection, design and ongoing maintenance and support can benefit your home and business - and shrink your bills! Our experienced clean energy and solar service certified electricians are dedicated to illuminating your path to renewable energy.

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Why Clean Energy Matters
The clean energy of tomorrow is here today! At Mario Castillo Electric, we believe clean energy is more than just an upgrade—it’s a way to create a sustainable future for your family while lowering your utility bills. Solar power reduces your dependence on traditional energy sources, helps protect the environment, and provides long-term financial benefits. Switching to clean energy means:
Lower monthly electricity costs
A smaller carbon footprint and reduced greenhouse gas emissions
Greater energy independence and protection against rising utility rates
Increased home and business value with a modern, eco-friendly upgrades
Commercial & Residential Renewable Energy Services
At Mario Castillo Electric, we offer a range of solar services to cater to your specific needs and budget. Our trained and certified electricians will assess your home and business' energy consumption and design a customized solar panel system that maximizes efficiency and savings. In addition, we will monitor your system for optimization and ensure your hardware and software is supporting the highest capacity of savings. Get a quote today!
Commercial & Residential Clean Energy Services
Lower your monthly electricity costs with commercial and residential clean energy services.
Consultation and Personalized Assessment
Understand how solar energy fits into your life with our comprehensive consulting services.
Expert Solar Panel Installation
Our certified residential solar electricians ensure a smooth and efficient installation process, respecting your time and property.
Custom Solar Panel Systems
Your home is unique, and so should be your solar solution. We design systems to fit your specific energy needs.
Solar Battery Storage Solutions
Maximize your solar investment with our state-of-the-art battery storage systems that provide reliability and peace of mind.
Maintenance & Monitoring
Keep your solar investment performing at its best!
Support & Troubleshooting
Remote and onsite support for ongoing care and solar system upkeep.
System Upgrades
From hardware to software we can help you upgrade - even retrofit - your system for optimal performance.
Why Choose Solar Energy?
Embrace clean energy and solar services with Mario Castillo Electric! Investing in solar power is a sustainable way to reduce your carbon footprint and achieve energy independence that results in savings. With Mario Castillo Electric helping you design, install, monitor and troubleshoot your solar power systems, you can unlock the full potential of the sun's abundant energy, leading to lower utility bills and a more eco-friendly lifestyle.
By choosing to invest in this technology, you're not only making a smart financial decision but also contributing to a sustainable future. With our solar panel installations and ongoing maintenance plan along with our commitment to excellence, we ensure an electrifyingly positive experience for your home, business and budget! Start your sustainable energy journey today and contribute to a greener planet.

NEM 3.0
California's Net Energy Metering (NEM) 3.0 policy is steering us into a future of cleaner energy with solar incentives that make going solar more appealing than ever. Our knowledgeable solar energy consultants can guide you in leveraging these opportunities to make a positive environmental impact and enjoy financial benefits.
Mario Castillo Electric is Your Trusted Partner
When you choose Mario Castillo Electric, you get more than just a solar installation—you gain a trusted partner in your journey to clean, reliable, and affordable energy. Our team is here for you before, during, and long after your system is installed.
- Qualified Expert Technicians: Our skilled solar installers possess the expertise to deliver high-quality solar panel installations tailored for Long Beach, LA County and Orange County Communities and the surrounding area homes and businesses.
- Locally Owned & Operated: Being a local, family-owned company, we take pride in fostering community relations and understanding your needs.
- Access to Free Financing Options: We offer financial solutions that can free you to go solar without worrying about upfront costs.
- Assured Satisfaction: Our one-year warranty and dedication to 100% customer satisfaction underpin our high-caliber services.
- Unmatched Customer Care & System Support: Your experience is paramount. We guarantee thorough after-installation support, troubleshooting, maintenance, monitoring and ongoing advice.


Expert Technicians

Local & Family-Owned Company

Free Financing Options

One-Year Warranty on Services

100% Customer Satisfaction Guaranteed
Check Out Our Latest Offers and Specials!
Frequently Asked Questions
Mario Castillo Electric is a trusted name in the renewable electric and solar energy industries, and we pride ourselves on providing exceptional service to our clients. We understand that navigating the world of electric and solar services can be confusing, which is why we’ve compiled a list of common questions. View our resource below for homeowners and businesses.
Solar energy reduces your electricity costs, increases your home’s value, and lowers your carbon footprint. It also provides long-term energy independence by protecting you against rising utility rates.
Yes. We specialize in reactivating and servicing legacy or abandoned installs, ensuring they are brought back online safely and efficiently.
Absolutely. We can expand your system with additional panels, add battery storage, upgrade inverters, or integrate smart energy platforms such as Modbus, MQTT, or Home Assistant.
Solar panels are low-maintenance, but we recommend periodic system checks. Our services include monitoring performance, diagnosing issues, updating firmware, and ensuring wiring and inverters remain in top condition.
We can help you track production vs. consumption in real time. If Wi-Fi is lost or your system disconnects, our team can remotely diagnose and restore connection.
Our team evaluates your roof structure, sunlight exposure, current energy usage, and local utility requirements. Even if your roof isn’t ideal, ground-mounted or hybrid options may still be available.
We handle everything from system design and inspections to final installation and activation of the system, with ongoing maintenance, troubleshooting and beyond. Installation is unique to the size of project but with Mario Castillo Electric you will know the status of the project every step of the way.
We offer full troubleshooting and repair services. From inverter resets and wiring inspections, our technicians can identify and fix the issue quickly.
Standard solar systems shut off during outages for safety reasons. To maintain power during blackouts, we offer battery storage solutions that provide backup energy when you need it most.
Choosing the right solar panel for your home can be difficult. We can help you simplify the process.
Read our blog for more information!
Choosing the Right Solar Panel for Homes in Long Beach and the Surrounding Areas
Yes. We partner with trusted financing providers to make solar more affordable. Options include low-interest loans, payment plans, and incentives such as tax credits and rebates.
Sorting through the sea of solar batteries can be a challenge. Read our blog for more insight!
Mario Castillo Electric Powers Up New Solar Battery Services
Mario Castillo Electric understands the impact of NEM on customers, clients and the services we provide! Read our blog for the benefits and impacts.
Mario Castillo Electric Sheds Light on NEM 3.0 & Our New Solar Energy Services
Check out our Blog
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South Bay and Orange County Communities We Serve
LA County / Southbay Cities:
Carson, Cerritos, Compton, Downey, Gardena, Harbor City, Hawaiian Gardens, Lakewood, Lomita, Long Beach, Norwalk, San Pedro, Signal Hill, Palos Verdes Peninsula, Torrance, Wilmington, Lynwood, Lawndale, La Mirada, Paramount, Artesia, Hawthorne, Willowbrook
Orange County Communities:
Rossmoor, Alamitos, Cypress, Seal Beach, Irvine, Buena Park, La Palma, Fullerton, Anaheim, Westminister, Stanton, Midway City, Orange, Garden Grove, Fountain Valley, Costa Mesa, Santa Ana, Newport Beach, Tustin/North Tustin, Huntington Beach, Villa Park, Placentia, Yorba Linda
