Solar power has been making significant strides in the Golden State as an increasing number of residences and businesses make the shift towards renewable energy. The industry features diverse companies, ranging from providers of residential solar energy solutions to those offering pioneering technologies for smarter and more affordable solar energy systems. These companies help individuals and businesses reduce their reliance on fossil fuels, lower utility costs, and contribute to a cleaner environment. With California's ambitious clean energy targets, this industry is poised for further growth as it explores new frontiers in delivering cost-effective, sustainable power sources.


Top 20 solar power companies in California

1. Sunrun

  • Website: sunrun.com
  • Headquarters: San Francisco, California, United States
  • Founded: 2007
  • Headcount: 10001+
  • Latest funding type: Post Ipo Debt
  • LinkedIn

Sunrun is a solar company that offers solar energy solutions to residential customers. They have provided solar to over 550,000 customers nationwide, saving them over $600 million on their utility bills.


2. SolarCity

  • Website: solarcity.com
  • Headquarters: San Mateo, California, United States
  • Founded: 2006
  • Headcount: 10001+
  • LinkedIn

SolarCity offers solar energy solutions to residential and commercial customers, providing clean and sustainable power. Their services include installation, financing, and maintenance of solar panels.


3. Enphase Energy

  • Website: enphase.com
  • Headquarters: Fremont, California, United States
  • Founded: 2006
  • Headcount: 1001-5000
  • Latest funding type: Post Ipo Equity
  • LinkedIn

Enphase is an energy technology company that prioritizes safety and quality. They offer microinverter systems, AC modules, and other products related to solar energy. They value innovation and strive to make solar energy smarter, simpler, and more affordable.


4. Sungevity

  • Website: sungevity.com
  • Headquarters: Oakland, California, United States
  • Founded: 2007
  • Headcount: 501-1000
  • Latest funding type: Post Ipo Debt
  • LinkedIn

Sungevity is a leading residential solar power company in California. They offer customized solar energy systems with battery storage options, providing savings and financing solutions. Their solar systems are designed to adapt to customers' changing needs and come with a guarantee of performance for 25 years. Sungevity also offers a solar lease program where they own, install, and maintain the solar system. With an easy-to-use monitoring app, customers can track their solar energy system in real-time.


5. Freedom Forever

Freedom Forever is a solar panel installation company that offers customized solar energy systems for residential customers. They guarantee the amount of energy that their systems produce for 25 years, making them the best in the industry. The company aims to provide freedom from high electric bills and help customers become more energy efficient.


6. d.light

  • Website: dlight.com
  • Headquarters: San Francisco, California, United States
  • Founded: 2007
  • Headcount: 201-500
  • Latest funding type: Debt Financing
  • LinkedIn

d.light is a company that specializes in providing solar products and appliances. They offer a wide range of products such as solar lanterns, solar home systems, and portable chargers. Their mission is to transform the way people use and pay for energy.


7. Nextracker Inc.

  • Website: nextracker.com
  • Headquarters: Fremont, California, United States
  • Founded: 2013
  • Headcount: 201-500
  • Latest funding type: Ipo
  • LinkedIn

Nextracker Inc. is a global leader in solar tracker technology and advanced software solutions. With a focus on maximizing energy yield and plant performance, we offer innovative engineered designs and control systems for utility and commercial solar projects. Our proprietary software, TrueCapture™, boosts energy yields by up to 6% and has been embraced by financial institutions and developers worldwide. With a dedicated team and a global supply chain, we ensure the successful completion of solar projects in any terrain.


8. Clearway Energy Group

  • Website: clearwayenergygroup.com
  • Headquarters: San Francisco, California, United States
  • Founded: 2018
  • Headcount: 501-1000
  • Latest funding type: Secondary Market
  • LinkedIn

Clearway Energy Group is a leading provider of clean power generated by solar and wind across the US. They own and operate utility-scale wind and solar assets, community solar projects, and distributed solar projects. Their vision is to create a world powered by clean energy, and they work with customers, partners, and affiliates to accelerate the transition to a clean energy future.


9. GRID Alternatives

  • Website: gridalternatives.org
  • Headquarters: Oakland, California, United States
  • Founded: 2001
  • Headcount: 201-500
  • Latest funding type: Grant
  • LinkedIn

GRID Alternatives is a nonprofit organization that provides solar energy solutions and training programs for under-resourced communities. They offer installation training, workforce development, and clean mobility services.


10. SOLV Energy

  • Website: solvenergy.com
  • Headquarters: San Diego, California, United States
  • Founded: 2008
  • Headcount: 501-1000
  • LinkedIn

SOLV Energy is a company that specializes in building and managing state-of-the-art renewable energy systems and storage solutions. They are passionate about providing cleaner power, better jobs, and a brighter future for their community.


11. Renogy

  • Website: renogy.com
  • Headquarters: Ontario, California, United States
  • Founded: 2010
  • Headcount: 501-1000
  • Latest funding type: Series E
  • LinkedIn

Renogy is a company that offers a wide range of solar products and accessories. They provide battery chargers, solar panels, inverters, and other portable gear for various applications. Renogy also offers complete solar kits and deep cycle batteries for RV/Van and off-grid systems.


12. 174 Power Global

  • Website: 174powerglobal.com
  • Headquarters: Irvine, California, United States
  • Founded: 2017
  • Headcount: 201-500
  • Latest funding type: Debt Financing
  • LinkedIn

174 Power Global is a US-based company that specializes in utility-scale solar power and energy storage systems. They are committed to developing innovative solutions for a sustainable future.


13. Citadel Roofing & Solar

  • Website: citadelrs.com
  • Headquarters: Vacaville, California, United States
  • Founded: 2015
  • Headcount: 201-500
  • LinkedIn

Citadel Roofing & Solar offers homeowners in California the opportunity to save energy and protect their homes with solar panels, energy storage, and roofing solutions.


14. Qcells USA Corp.

  • Website: qcellsusa.com
  • Headquarters: Irvine, California, United States
  • Founded: 2015
  • Headcount: 51-200
  • LinkedIn

Qcells USA is a fully integrated EPC contractor offering solar developers a turnkey, bankable solution for their solar power investment. They provide EPC services from project engineering and design support in the early development stage to project realization. With 332 MW completed in North America and 2 GW under development or construction across the United States, they have expertise in utility-scale EPC.


15. Electrum

  • Website: electrum.co
  • Headquarters: Los Angeles, California, United States
  • Founded: 2014
  • Headcount: 51-200
  • Latest funding type: Angel
  • LinkedIn

Electrum is a company that provides innovative solutions in the field of solar energy. They offer a range of products and services related to solar power, including solar panels, installation services, and maintenance. With a focus on sustainability and renewable energy, Electrum aims to help individuals and businesses transition to clean and efficient solar energy.


16. Talesun Solar USA Ltd.

  • Website: talesunusa.com
  • Headquarters: San Jose, California, United States
  • Founded: 2009
  • Headcount: 1001-5000
  • LinkedIn

Talesun USA LLC is a company that specializes in producing solar panels and wind turbines for commercial and residential use.


17. Apricot Solar

Apricot Solar is a company that offers solar energy solutions for residential and commercial properties. They provide a range of products and services, including solar panel installation, maintenance, and financing options.


18. KOTA Energy Group

Kota Energy Group offers battery systems that charge with solar energy, providing power during outages and ensuring the safety and security of your home. They provide financing options and professional installations, focusing on quality and 25-year warranties.


19. SunPro Solar

SunPro Solar is a company that specializes in residential and commercial solar solutions. With a focus on providing durable and weather-resistant solar panels, they help homeowners and businesses save on electricity costs and shield themselves against future rate increases. They offer services such as solar panel installation, cleaning, and battery storage.


20. Trimark Associates, Inc.

Trimark is a company that specializes in designing, installing, and servicing utility-scale SCADA and metering systems for PV plants. They support the national goal of reducing greenhouse gas emissions and are committed to 'greening the grid'.


Want to find more solar power companies?


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