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Top 10 Best Solar Energy Companies in Northern California in 2020

We know finding the best solar energy companies in Northern California can be difficult, so we put together this detailed list of the best of the best so you can make your decision wisely.  Each solar energy company may be in the business for a very long time and definitely all of their contractors are a certified professional and has licensed to prove their qualification. They may also provide agreement and warranties that suit your needs after the installation process. You may also check their website for a client’s review so you can finally choose the perfect installer for your personal, commercial or agricultural use.  This list of amazing locations is ever-changing and expanding, so please check back often. If you find another location that should be listed here – or one that should be removed – please let us know!

Solar Harmonics

Solar Energy Companies in Contra Costa County, California

Brentwood, California 94513 (925) 756-6944

About:  Solar Harmonics is a highly reviewed solar energy contractor, the best solar panel installer in Northern California, an award-winning, Diamond Certified and responsive solar provider.  If your home, company or farm needs an add-on solar system such as a whole house fan, variable-speed pool pump, or ground mount solar, the company gives free consultation full of real-world advice to maximize your energy usage and reduce your PG&E costs. We are NorCal’s nice solar solution. If you check in Google for a solar energy company that is near your place, you can be confident that our qualified team of licensed installers will be ready to support you. Solar Harmonics is centrally located near the historic center of Brentwood, close to the famous Brentwood Family Aquatic Complex and Brentwood Streets.

Services Offered:  Installation of residential solar panel systems, commercial solar panel systems and agricultural solar panel systems

What Makes them Different:  Diamond Certified, Owned Solar Panel Systems

Diablo Solar Services, Inc.

Solar Energy Companies in Contra Costa County, California

5021 Blum Rd STE 2, Martinez, CA 94553

About: In the late 1970s, Phil Deatsch and Tim Kruse started installing solar systems in the San Francisco Bay Area. They have been leading the solar installation industry for nearly 40 years, and since the founding of Diablo Solar Services in 1984, they have personally built and operated over 21,000 solar systems; more solar than any team in Bay Area history. Phil and Tim retired in 2015, but still have a close relationship with the new Diablo Solar team’s current owners – Bryan Raymond and Mike Powers. 

Services Offered: Solar Electric (PV) Systems, Combination Pool and PV Systems, Solar Pool Heating Systems, Seasonal Shutdown / Startup, Re-Roofing Service, and Repair / Maintenance Service

What Makes them Different: have over 223 years of combined solar experience


NorthStar Solar

Solar Energy Companies in Contra Costa County, California

822 Hartz Way #240, Danville, CA 94526

About: NorthStar Solar is located in Downtown Danville and serves the Bay Area and Central Valley. They compete in an industry where big companies treat customers like numbers with limited transparency and installation of cheap products to maximize profits. With full transparency, NorthStar Solar disrupts this tradition and offers efficiency that will last for a lifetime.

Services Offered: PV solar installations, roof replacements, ground-mount solar systems, rooftop solar, electric service panel upgrades, electric vehicle chargers, battery installation residential and commercial.

What Makes them Different: The best warranty in the industry. 25-year manufacturer warranty on solar systems.



Solar Energy Companies in Contra Costa County, California

6 Persia Ave, San Francisco, CA 94112



About: SolarUnion was established in 2011. The company uses only the highest quality solar photovoltaic components. This enables them to offer a 25-year production guarantee. They stand behind each and every one of their solar PV systems. As of April 22, 2016, and every year since SolarUnion has won and retained the prestigious Diamond Certified award.

Services Offered: solar panel installations, solar readiness audits, solar roof inspections, electrical panel upgrades, and solar EV charging station installations

What Makes them Different: Diamond Certified Bay Area solar company in the Silicon Valley and Bay Area



Sunvalley Solar

Solar Energy Companies in Contra Costa County, California

5653 Stoneridge Dr #108, Pleasanton, CA 94588

About: Sunvalley Solar was established in 2007. The company is a leading solar system solution provider that offers comprehensive solar energy technology, system design, installation, builders, homeowners, businesses/commercial buildings, and government entities that assist them in reducing utility bills, effects of climate change, and increasing energy reliability and independence through solar energy. Located in Castro Valley, California, Sunvalley Solar, Inc. is committed to lessening the world’s carbon footprint from traditional energy sources to make renewable sources such as solar the nation’s mainstream source of power.

Services Offered: Solar Energy Installations for local multi-family communities, commercial buildings, and agricultural facilities

What Makes them Different: focuses on retrofitting buildings to become more energy efficient




Slingshot Power

Solar Energy Companies in Contra Costa County, California

1805 Little Orchard St #100, San Jose, CA 95125

About: Slingshot Power was established in 2012. Paul Sherer is the owner and founder of this company. He gives all his entrepreneurial energy and passion to Slingshot Power. Growing up among 11 siblings in the Midwest, he truly enjoyed the outdoors like being at the lakes, fields, etc. He moved to California 40 years ago to make his home in the Bay Area and Silicon Valley to promote Education, the Internet, and Renewable Energy technologies.

Services Offered: Residential and commercial solar power installation

What Makes them Different:  Alow cost, high-quality vendor that offers package the best value for your needs





Solar Doctors

Solar Energy Companies in Contra Costa County, California

3233 Grace Dr, Diamond Springs, CA 95619

About: Solar Doctors LLC started in 2019 because the business owner Alicia D.  noticed that a lot of solar companies only worried about their revenue and would forgo aesthetically pleasing work. Alicia believes all work should go the extra mile without the extra cost.

Services Offered: Solar Installation with routine cleanings and checkups

What Makes them Different: They offer full solar and battery backup system check. Especially useful for their customers whose solar company already closes or gone out of business.





Earth Electric

Solar Energy Companies in Contra Costa County, California

San Jose, CA 95125

About: Earth Electric Incorporated was established in 2009. They are fully licensed, insured and experienced solar installation company serving the greater San Jose/Bay Area community. They specialize in residential solar installation and as of the moment do not serve commercial jobs. They also handle solar troubleshooting and repair, and EV charging station installation. 

Services Offered:  Solar installation, electric vehicle charging, and financing

What Makes them Different: Top Solar Contractor by Solar Power World Magazine. Earth Electric is an authorized PACE financing installer.

Synergy Power

Solar Energy Companies in Contra Costa County, California

962 Sunset Dr, Livermore, CA 94551

About: Synergy Power was established in 2005. The company created a small business partnership. As a general contractor, they have built anything from a school auditorium to commercial remodeling. They have installed solar in both residential and commercial purposes. Finally, in 2017 they built a new corporate structure that gave them a new name and place in the market. Most of their work is for sales companies or contractors.

Services Offered: Solar Panel Installation, Business Solar, Panel Repairs & Add-Ons, Solar for Your Home and Solar Panel Maintenance

What Makes them Different:  Trained and certified installers

Valley Solar

Solar Energy Companies in Contra Costa County, California

9265 Beatty Dr, Sacramento, CA 95826

About: President and owner Brad Price established Valley Solar in 2006. Brad has been involved in solar photovoltaics for more than fifteen years. He started Valley Solar when he was working as a solar technician for a solar inverter company. In many homes, he had to repair the installations that had been done poorly, or not to a quality he thought was necessary to maintain while conducting installations.

Services Offered: Battery Bank Services, Ground-mounted System Services, Solar Electric/PV System Installation, Solar EV Charging System Installation, Solar Panel Repair, Grid-tied Solar System Services, Virtual Consultations, Solar Electric/PV System Repair and Solar Panel Installation

What Makes them Different: Valley Solar Offers 25 Year Complete Confidence Warranty for SunPower Equinox Home Solar

What are your procedures for ensuring a contactless installation process?

Solar is installed on the roof or on the ground, and we already observed social distancing procedures. Our crews wear safety equipment including Personal Protection Equipment to prevent the spread of COVID 19 not only to our clients, but also within our crews.

How is the sales process if we cannot meet in person?

With just a few pieces of information about your solar project, we can design an online solar proposal for your review. We then set a time to review the proposal by phone or Zoom to answer any questions you have. The financing process is paperless and contactless, any hard copies are sent by Priority Mail/FedEx. All of the contracts and disclosures are contactless using e-signatures.

How is the permit process contactless?

Many jurisdictions are starting to allow online permit applications and communication is facilitated by email. Final inspections are still completed in person, but social distancing and PPE is used to prevent the spread of COVID-19.

How do we ensure our installation crews are COVID-19 free?

Any of our installers that show up to work with an elevated temperature, coughing, fever or other sickness, they are sent home until the symptoms have subsided.

Where can I find more information about COVID-19 and the Solar Industry?

Please check with the SEIA (Solar Energy Industry Association) on all of the latest developments and safety protocols in the solar industry.

Considering Going Solar? Solar Harmonics is Here to Help!

Most of our clients are looking for a company they can trust to help them go solar. Based on our decade in business, online reviews, and Diamond Certification, Solar Harmonics is the best choice to trust to complete your solar project on time, on budget, and with the expected results. It is our mission to design the best value solar panel system that produces reliably over the next 30 – 40 years, and saves the most money for our clients. If the financial goals of our clients intersects with the global and environmental goals of our founder, it is a win for everyone except the utility companies.  Contact us today for your free quote!

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