The solar energy industry in the US has rapidly evolved to become a crucial part of the energy market. Companies ranging from large-scale providers to local contractors facilitate the installation of solar panels, battery storage, and energy management systems. As innovation continues to drive down costs, consumers increasingly embrace solar technology. This embrace has led to a strong focus on residential solutions, community solar projects, and energy efficiency. The US solar market is projected to grow further, making it an attractive space for investment and development.

This article examines 24 noteworthy solar energy companies in the US, representing a mix of sizes, headquarters across diverse states, and varying founded years from as early as 1985. These companies focus on residential and commercial solutions, with some offering additional services such as energy storage and HVAC systems. By understanding their unique specializations, investors can better gauge market opportunities and trends.

Continue reading to learn about notable solar energy companies in the US.

Top 24 Solar Energy Companies in the US

1. Vivint Solar

• Website: vivintsolar.com
• Ownership type: Corporate
• Headquarters: Beltsville, Maryland, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: $3.2B, July 2020
• Founded year: 2011
• Headcount: 5001-10000
• LinkedIn: armed-forces-credit-solutions-llc

Vivint Solar, now known as Sunrun, is a prominent solar energy provider based in Beltsville, Maryland. Founded in 2011, the company specializes in offering solar power solutions tailored for residential customers. Their services include solar panel installations, solar subscriptions, and advanced energy management technologies. This focus allows homeowners to reduce their energy costs while transitioning to renewable energy sources. Sunrun has made significant strides in the industry, having powered over one million homes with solar energy. The company has also received substantial funding, totaling $3.2 billion as of July 2020, which underscores its growth potential and commitment to enhancing solar accessibility. Sunrun's innovative approach includes tailored payment plans and cutting-edge battery storage solutions, making solar energy more affordable and reliable for consumers.

2. SunPower Corporation

• Website: us.sunpower.com
• Ownership type: Private Equity
• Headquarters: Richmond, California, United States (USA)
• Employee distribution: United States (USA) 55%, Philippines 35%, Mexico 4%, Other 7%
• Latest funding: Other (Debt), $300.0M, February 2024
• Founded year: 1985
• Headcount: 1001-5000
• LinkedIn: sunpower-corporation

SunPower Corporation, based in Richmond, California, is a prominent solar energy provider that has been operational since 1985. The company specializes in residential solar solutions, offering a range of products including high-quality solar panels, battery storage systems, and electric vehicle (EV) charging solutions. SunPower aims to help homeowners reduce their energy costs and environmental impact through its innovative technologies. The company operates through a network of certified dealers, ensuring personalized service and support for its customers. With a workforce of approximately 3,572 employees, SunPower has a significant presence in the United States, as well as in the Philippines and Mexico. In February 2024, SunPower secured $300 million in funding, reflecting strong investor confidence in its business model and growth potential. This financial support will likely aid in furthering their mission to provide clean energy solutions to homeowners across the nation.

3. Semper Solaris

• Website: sempersolaris.com
• Ownership type: Private
• Headquarters: El Cajon, California, United States (USA)
• Employee distribution: United States (USA) 99%
• Founded year: 2012
• Headcount: 501-1000
• LinkedIn: semper-solaris

Semper Solaris, based in El Cajon, California, is a private solar energy provider and roofing contractor that specializes in solar power solutions, battery storage, and HVAC systems. Founded in 2012, the company primarily serves homeowners, helping them enhance energy efficiency and reduce utility costs. Semper Solaris prides itself on delivering high-quality service and ensuring customer satisfaction. The company has expanded its offerings to include roofing services, which complement their solar installations, allowing for streamlined home energy solutions. They have received numerous awards for their performance in the solar industry, highlighting their commitment to excellence and innovation. Semper Solaris operates across various locations in the United States, making them accessible to a broad customer base.

4. Blue Raven Solar

• Website: blueravensolar.com
• Ownership type: Corporate
• Headquarters: Orem, Utah, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: $165.0M, October 2021
• Founded year: 2014
• Headcount: 1001-5000
• LinkedIn: blue-raven-solar

Blue Raven Solar, based in Orem, Utah, is a solar energy provider that specializes in residential solar panel installation and financing solutions. Since its inception in 2014, the company has aimed to empower homeowners by helping them reduce their energy costs and transition to renewable energy sources. Blue Raven Solar offers a comprehensive service that includes system design, permitting, financing, and installation, all managed in-house to ensure a seamless experience for customers. The company has expanded its reach across multiple states, providing services in locations such as Colorado, Florida, and North Carolina. With a workforce of over 1,100 employees, Blue Raven Solar has positioned itself as a significant player in the solar industry. The company secured $165 million in funding in 2021, which underscores its growth trajectory and commitment to enhancing its offerings in the renewable energy market.

5. Renogy

• Website: renogy.com
• Ownership type: Venture Capital
• Headquarters: Ontario, California, United States (USA)
• Employee distribution: United States (USA) 48%, China 48%, Czech Republic 2%, Other 2%
• Latest funding: Series E-K, June 2022
• Founded year: 2010
• Headcount: 501-1000
• LinkedIn: renogy

Renogy, based in Ontario, California, is a solar energy provider that specializes in renewable energy solutions. Founded in 2010, the company has carved out a niche by offering a comprehensive range of products, including solar panels, batteries, and inverters. Renogy serves both individual consumers and businesses, helping them harness solar power for energy independence and cost savings. The company operates primarily through an online platform, which streamlines the purchasing process and enhances customer experience. This approach allows customers to access solar energy systems easily, without the traditional sales pressure. Renogy's commitment to innovation is evident in their product offerings, which include high-efficiency solar panels and smart energy management solutions. Their recent funding round in June 2022 reflects continued investor interest and confidence in their business model and growth potential. Renogy's mission is to accelerate the adoption of clean energy solutions globally, making them a significant player in the solar energy industry.

6. Palmetto

• Website: palmetto.com
• Ownership type: Private Equity
• Headquarters: Charlotte, North Carolina, United States (USA)
• Employee distribution: United States (USA) 99%, Other 1%
• Latest funding: Other (Debt), $1.2B, January 2025
• Founded year: 2009
• Headcount: 201-500
• LinkedIn: palmetto%e2%84%a2

Palmetto is a solar energy provider based in Charlotte, North Carolina, specializing in customized solar solutions for homeowners. Established in 2009, the company aims to help customers reduce their electricity costs and transition to renewable energy sources. Palmetto offers a range of products, including solar panels and energy plans, and provides comprehensive support throughout the installation and maintenance process. The company has a significant presence in the U.S. market, with operations primarily focused on residential solar solutions. Recently, Palmetto secured $1.2 billion in funding, indicating strong investor confidence and a commitment to growth. Their innovative LightReach Energy Plan allows customers to go solar without the burden of upfront costs, enhancing accessibility to clean energy. Palmetto also emphasizes customer education, offering resources to help homeowners understand solar energy and its benefits, further establishing their role in the solar industry.

7. d.light

• Website: dlight.com
• Ownership type: Venture Capital
• Headquarters: San Francisco, California, United States (USA)
• Employee distribution: Kenya 48%, Tanzania 13%, India 13%, Other 25%
• Latest funding: Other (Debt), $176.0M, July 2024
• Founded year: 2007
• Headcount: 501-1000
• LinkedIn: d-light-design

d.light, founded in 2007 and based in San Francisco, California, is a solar energy company dedicated to enhancing energy access for underserved communities. The company specializes in solar home systems, inverters, and appliances, all designed to improve the quality of life for consumers. With a workforce of nearly 1,000 employees, d.light operates primarily in regions like Kenya, Tanzania, India, Nigeria, and Uganda, where it has established a significant presence. The company has successfully empowered over 180 million people through its sustainable products and has offset 40 million tons of CO2 through its clean energy initiatives. d.light's innovative Pay-As-You-Go financing model allows customers to access solar energy solutions without the burden of upfront costs. Recently, d.light secured $176 million in funding, further solidifying its position in the solar energy sector and enabling it to expand its reach and impact.

8. Freedom Forever

• Website: freedomforever.com
• Ownership type: Private
• Headquarters: Temecula, California, United States (USA)
• Employee distribution: United States (USA) 99%, Other 1%
• Founded year: 2011
• Headcount: 1001-5000
• LinkedIn: freedom-forever

Freedom Forever, based in Temecula, California, is a private solar energy provider specializing in residential solar panel installation and energy storage solutions. Founded in 2011, the company aims to help homeowners reduce energy costs and achieve greater energy independence through renewable energy. Freedom Forever offers tailored solar systems and flexible financing options, ensuring a smooth transition to solar power for its customers. The company has built a reputation for its customer-centric approach, exemplified by its unique 25-year production guarantee, which assures clients of the energy output from their solar systems. With a workforce of approximately 1,800 employees, Freedom Forever is actively involved in the solar industry, focusing on enhancing the accessibility and affordability of solar energy for homeowners across the United States.

9. Green Solar Technologies

• Website: greensolartechnologies.com
• Ownership type: Corporate
• Headquarters: Los Angeles, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: February 2024
• Founded year: 2010
• Headcount: 201-500
• LinkedIn: green-solar-technologies

Green Solar Technologies, based in Los Angeles, California, is a solar energy provider that specializes in delivering affordable solar solutions to residential and commercial clients. Established in 2010, the company has built a reputation for its commitment to high-quality, American-made solar products. They offer a comprehensive suite of services, including solar panel installation, energy storage systems, and customized financing options designed to help customers reduce their energy costs and carbon footprint. With a focus on making solar energy accessible, Green Solar Technologies has positioned itself as a knowledgeable partner in the solar industry, leveraging over a decade of experience to guide clients through the transition to renewable energy. Their dedication to customer satisfaction and innovative solutions reflects their role as a proactive participant in the solar energy market.

10. Greentech Renewables

• Website: greentechrenewables.com
• Ownership type: Private
• Headquarters: San Diego, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1957
• Headcount: 1001-5000
• LinkedIn: cedgreentech

Greentech Renewables, based in San Diego, California, specializes in renewable energy solutions with a strong emphasis on solar energy. Founded in 1957, the company has built a reputation for providing a wide array of products, including solar panels, inverters, energy storage systems, and solar racking. They also offer essential services such as design and financing, which support their clients in implementing solar technology effectively. Greentech Renewables serves a variety of customers, from residential homeowners to commercial enterprises and organizations, helping them transition to solar energy. Their commitment to customer support is evident through resources like a customer portal and a Q&A forum, which facilitate engagement and provide valuable information to clients and installers alike.

11. Nexamp

• Website: nexamp.com
• Ownership type: Venture Capital
• Headquarters: Boston, Massachusetts, United States (USA)
• Employee distribution: United States (USA) 99%, Other 1%
• Latest funding: Other (Debt), $340.0M, April 2025
• Founded year: 2007
• Headcount: 201-500
• LinkedIn: nexamp

Nexamp, headquartered in Boston, Massachusetts, is a clean energy provider that specializes in solar energy and energy storage solutions. Established in 2007 by two U.S. Army veterans, the company has grown to employ between 201 and 500 individuals. Nexamp offers a range of services, including community solar, energy storage, and power purchase agreements, aimed at helping residential consumers, businesses, and municipalities reduce energy costs and achieve sustainability objectives. The company has developed a unique vertically integrated model that allows it to manage projects from development through to customer management. With a focus on democratizing clean energy, Nexamp has made significant strides in expanding access to solar power across the United States. Their recent funding of $340 million underscores their growth potential and commitment to enhancing their service offerings in the renewable energy sector.

12. Greenskies Clean Focus

• Website: greenskies.com
• Ownership type: Private Equity
• Headquarters: North Haven, Connecticut, United States (USA)
• Employee distribution: United States (USA) 98%, Other 2%
• Latest funding: October 2023
• Founded year: 2009
• Headcount: 51-200
• LinkedIn: greenskies-clean-energy

Greenskies Clean Focus is a solar energy provider based in North Haven, Connecticut, specializing in renewable energy solutions tailored for municipalities, schools, nonprofits, and commercial entities. Since its inception in 2009, the company has developed and constructed over 320 MW of renewable energy facilities across more than 600 sites in 19 states. Greenskies offers a comprehensive suite of services, including project financing, operations and maintenance, and solar installations, allowing clients to transition to solar energy without upfront costs. The company has been recognized for its achievements, notably being ranked as the number one commercial solar developer in the Northeast and among the top three in the U.S. by Solar Power World. Greenskies operates with a focus on building long-term partnerships, ensuring that clients benefit from ongoing support and maintenance throughout the life of their solar projects.

13. GAF Energy

• Website: gaf.energy
• Ownership type: Private
• Headquarters: San Jose, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: Other (Grant), $1.6M, May 2024
• Founded year: 2019
• Headcount: 201-500
• LinkedIn: gaf-energy

GAF Energy, founded in 2019 and based in San Jose, California, is a private company specializing in solar roofing solutions. The company focuses on innovative products that integrate solar technology directly into roofing materials, with Timberline Solar™ being a prime example. This product not only serves as a protective roof but also generates clean electricity, making it an attractive option for homeowners looking for sustainable energy solutions. GAF Energy targets both homeowners and roofing contractors, providing advanced products that enhance energy efficiency and installation processes. The company has a workforce of approximately 383 employees and has recently secured funding, reflecting its growth and commitment to the solar energy market. GAF Energy's mission is to promote energy generation from every roof, contributing to a more sustainable future.

14. EnergySage

• Website: energysage.com
• Ownership type: Corporate
• Headquarters: Boston, Massachusetts, United States (USA)
• Employee distribution: United States (USA) 88%, Serbia 12%
• Latest funding: February 2022
• Founded year: 2009
• Headcount: 51-200
• LinkedIn: energysage

EnergySage, founded in 2009 and based in Boston, Massachusetts, is a clean energy solutions provider that specializes in solar energy, backup power, heating and cooling systems, and electric vehicle charging. The company assists both homeowners and businesses in exploring their clean energy options, offering personalized quotes and expert guidance to help them electrify their homes and reduce energy costs. EnergySage has developed a marketplace that connects users with pre-screened local solar installers, making it easier for customers to find reliable service providers. They also provide extensive educational resources, including guides and calculators, to help users understand the benefits and costs associated with solar energy. With a workforce of approximately 135 employees, EnergySage has made a significant impact in the clean energy sector, helping over 50,000 homeowners electrify their homes and contributing to substantial reductions in CO2 emissions. Their commitment to transparency and customer support further solidifies their role in the solar industry.

15. Xero Solar

• Website: xerosolar.com
• Ownership type: Private
• Headquarters: El Segundo, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2010
• Headcount: 51-200
• LinkedIn: xerosolar

Xero Solar is a private solar energy company located in El Segundo, California, established in 2010. The firm specializes in designing, installing, and managing solar energy systems tailored for both residential and commercial customers. With a dedicated team of around 37 employees, Xero Solar emphasizes a consultative approach to projects, ensuring that each installation meets the unique needs of its clients. They also provide energy storage solutions, which enhance the efficiency and reliability of solar energy systems. The company prides itself on using high-quality products and maintaining a strong focus on customer satisfaction. Xero Solar has installed numerous systems across Southern California, contributing to the region's shift towards renewable energy and sustainability.

16. Alternate Energy Inc.

• Website: alternateenergyhawaii.com
• Ownership type: Private
• Headquarters: Honolulu, Hawaii, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1993
• Headcount: 51-200
• LinkedIn: alternate-energy-inc-

Alternate Energy Inc., based in Honolulu, Hawaii, has been a significant player in the renewable energy sector since its inception in 1993. The company specializes in solar energy systems, air conditioning, and battery storage solutions, catering to both residential and commercial customers. With a focus on reducing energy costs and promoting sustainability, Alternate Energy has established itself as a trusted provider of high-quality installations and services. The company prides itself on using premium products, including Panasonic and Mitsubishi solar panels, and has been recognized for its excellence in service, winning multiple awards for being the best solar company in Hawaii. Their in-house teams are fully licensed, ensuring that all installations meet high standards of quality and safety. With a strong local presence and a commitment to customer satisfaction, Alternate Energy continues to play a vital role in Hawaii's transition to renewable energy.

17. Alta Devices

• Website: altadevices.com
• Ownership type: Corporate
• Headquarters: Sunnyvale, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: December 2013
• Founded year: 2008
• Headcount: 201-500
• LinkedIn: alta-devices

Founded in 2008 and based in Sunnyvale, California, Alta Devices is a company dedicated to solar energy solutions. They specialize in the development of high-efficiency solar cells, particularly utilizing gallium arsenide technology. This innovative approach has allowed them to achieve notable efficiency records, including a dual junction solar cell efficiency of 30.8%, verified by the National Renewable Energy Laboratory. Alta Devices not only provides solar panels but also offers educational resources aimed at helping homeowners and businesses understand the benefits and practicalities of solar energy. Their target customers include both residential users and commercial enterprises looking to reduce energy costs and promote sustainability. The company has a team with extensive experience in the solar industry, which enhances their credibility and expertise in designing, installing, and maintaining solar systems. Although they have not reported any recent funding, their historical achievements and ongoing commitment to solar technology make them a relevant player in the solar energy sector.

18. Renova Energy

• Website: renovaenergy.com
• Ownership type: Private
• Headquarters: Palm Desert, California, United States (USA)
• Latest funding: September 2022
• Founded year: 2006
• Headcount: 201-500
• LinkedIn: renova-solar

Renova Energy, based in Palm Desert, California, is a private solar energy provider that specializes in the installation, maintenance, and cleaning of solar panels. Founded in 2006 by Vincent Battaglia, the company has grown to serve both residential and commercial customers across California and Arizona. With a workforce of approximately 300 employees, Renova Energy prides itself on its customer-centric approach, which has led to a significant portion of its new business coming from referrals. The company has been recognized for its excellence in the solar industry, receiving numerous awards from SunPower, including accolades for customer excellence and design installation. Renova Energy also offers unique services such as in-house solar system maintenance and cleaning, which further enhances its value proposition. The company is committed to promoting renewable energy solutions that not only reduce costs for customers but also contribute positively to the environment.

19. Baker Home Energy

• Website: bakerhomeenergy.com
• Ownership type: Family Owned
• Headquarters: Escondido, California, United States (USA)
• Employee distribution: United States (USA) 96%, Mexico 4%
• Founded year: 2007
• Headcount: 201-500
• LinkedIn: bakerhomeenergy

Baker Home Energy, based in Escondido, California, is a family-owned company that specializes in renewable energy solutions. Established in 2007, the firm has built a reputation for providing solar energy systems, home battery installations, heating and cooling services, and roofing solutions to homeowners throughout Southern California. With a workforce of approximately 162 employees, Baker Home Energy is dedicated to helping customers reduce their energy costs and enhance home comfort through efficient energy management. The company positions itself as a comprehensive provider of home energy solutions, ensuring that their clients can generate, store, and manage energy effectively. Their focus on customer service and community involvement further solidifies their standing in the renewable energy sector.

20. REC Solar

• Website: recsolar.com
• Ownership type: Private Equity
• Headquarters: San Luis Obispo, California, United States (USA)
• Employee distribution: United States (USA) 53%, Singapore 35%, Norway 9%, Other 3%
• Latest funding: October 2023
• Founded year: 1997
• Headcount: 11-50
• LinkedIn: rec-solar

REC Solar, based in San Luis Obispo, California, is a commercial solar energy provider that has been operating since 1997. The company specializes in onsite solar installations, energy storage solutions, and community solar projects. With a workforce of approximately 436 employees, REC Solar serves a variety of clients, including businesses, municipalities, and educational institutions. Their mission is to help these organizations reduce energy costs and meet sustainability targets through tailored renewable energy projects. Over the years, REC Solar has completed more than 700 projects nationwide, totaling 675 MW of solar and storage capacity. Their approach includes offering seamless financing options, such as power purchase agreements (PPAs), which allow clients to benefit from solar energy without upfront costs. This commitment to long-term support and high-quality service has established REC Solar as a trusted partner in the commercial solar sector.

21. Infinity Solar

• Website: infinitysolar.net
• Ownership type: Private
• Headquarters: Orange, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1999
• Headcount: 11-50
• LinkedIn: infinity-solar-orange-ca

Infinity Solar, based in Orange, California, has been a player in the solar energy industry since its inception in 1999. The company specializes in custom-designed solar panel and home battery systems, serving both residential and commercial customers. Their product offerings include well-known brands such as Tesla Powerwall and Panasonic solar panels, which are integral to their strategy of promoting sustainable energy solutions. Infinity Solar is dedicated to reducing electricity costs for its clients while facilitating the transition to renewable energy. They provide comprehensive installation services, from initial site assessments to final inspections, ensuring a seamless experience for customers. The company also offers various financing options, making solar energy more accessible. With a team of certified installers and a focus on high-quality service, Infinity Solar aims to meet the evolving energy needs of Southern California residents and businesses.

22. Solar Direct

• Website: solardirect.com
• Ownership type: Venture Capital
• Headquarters: Sarasota, Florida, United States (USA)
• Employee distribution: United States (USA) 48%, Australia 26%, France 26%
• Latest funding: Crowdfunding, $58,000, January 2019
• Founded year: 1985
• Headcount: 11-50
• LinkedIn: solar-direct

Solar Direct, based in Sarasota, Florida, is a solar energy company that specializes in the installation of solar panels for both residential and commercial clients. Established in 1985, the company has built a reputation for providing comprehensive solar solutions, including solar electric systems, pool heating, and solar water heaters. Their primary clientele consists of homeowners and businesses looking to lower energy expenses and increase property value through renewable energy. Solar Direct also offers financing options and assists customers in navigating federal tax credits, making solar energy more accessible. The company has a small team of around 30 employees and has expanded its reach beyond the U.S. to countries like Australia and France. In 2019, they engaged in crowdfunding to support their operations, reflecting their ongoing relevance and adaptability in the solar industry.

23. Powerhome Solar

• Website: powerhome.com
• Ownership type: Private Equity
• Headquarters: Mooresville, North Carolina, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: January 2018
• Founded year: 2014
• Headcount: 1001-5000
• LinkedIn: powerhomesolar

Powerhome Solar, based in Mooresville, North Carolina, is a private equity-owned company that has been operational since 2014. The firm specializes in providing solar energy solutions, particularly for off-grid living. Their product lineup includes solar generators, solar panels, and inverters, aimed at consumers who are interested in sustainable energy alternatives. Powerhome Solar focuses on enabling customers to generate their own power, especially in areas where traditional electricity sources are unavailable. The company has a workforce of approximately 437 employees, indicating a significant presence in the renewable energy market. Their commitment to off-grid solutions reflects a growing trend towards self-sufficiency in energy consumption, aligning with broader environmental goals.

24. ReVision Energy

• Website: revisionenergy.com
• Ownership type: Private
• Headquarters: South Portland, Maine, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2003
• Headcount: 201-500
• LinkedIn: revision-energy

ReVision Energy is a solar energy provider based in South Portland, Maine, with additional locations in New Hampshire and Massachusetts. Established in 2003, the company specializes in renewable energy solutions tailored for homes, businesses, and municipalities. Their offerings include solar panel installations, energy storage systems, electric vehicle charging stations, and heat pumps. ReVision Energy is notable for its employee-owned structure, which fosters a strong commitment to community engagement and environmental stewardship. The company has installed nearly 20,000 projects, resulting in significant carbon emissions reductions and substantial utility savings for its customers. As a Certified B Corporation, ReVision Energy emphasizes its mission to create a sustainable energy future while supporting local economies and promoting equitable access to renewable energy.

Solar Energy Insights: Key Companies in the US

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