Top 22 Solar Power Companies in Maryland
Top 22 Solar Power Companies in Maryland
The solar power industry in Maryland is vibrant, driving renewable energy adoption through innovative solutions. Companies engage in solar panel installations, energy efficiency services, and financing options. As the state pushes for cleaner energy, the sector is anticipated to expand rapidly, fueled by government incentives and public interest in sustainability. Trends like community solar and battery storage solutions reflect a growing commitment to energy independence. With a focus on technology and service, the industry's trajectory suggests a robust future filled with opportunities for homeowners and businesses alike to harness solar energy for cost savings and environmental benefits.
This listing features 22 solar power companies based in Maryland, ranging in size from small family-owned firms to large corporate entities. Founded between 1981 and 2022, the companies are concentrated in urban areas like Baltimore, Beltsville, and Annapolis, displaying varying specializations in solar installations and energy management. Together, they showcase a blend of innovative technologies and customer-focused services while addressing the increasing demand for sustainable energy solutions in the region.
Continue reading to learn about Maryland's top solar power companies.
Top 22 Solar Energy Companies in Maryland
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, founded in 2011 and based in Beltsville, Maryland, is a prominent solar energy provider specializing in residential solutions. The company focuses on solar panel installations, offering various plans including solar subscriptions and leasing options. This approach allows homeowners to reduce their energy costs while transitioning to renewable energy sources. Vivint Solar has made significant strides in the industry, with a reported funding amount of $3.2 billion as of July 2020, indicating strong investor confidence. Their services include comprehensive maintenance and monitoring, ensuring that customers receive ongoing support. With a commitment to innovative energy management technologies, Vivint Solar is well-positioned to meet the growing demand for sustainable energy solutions.
2. Solar Energy World
- Website: solarenergyworld.com
- Ownership type: Private
- Headquarters: Laurel, Maryland, United States (USA)
- Employee distribution: United States (USA) 91%, India 4%, Other 5%
- Founded year: 2009
- Headcount: 201-500
- LinkedIn: solar-energy-world
Solar Energy World, based in Laurel, Maryland, is a private solar energy provider specializing in the installation of solar panels and batteries. Established in 2009, the company has grown to employ around 338 individuals, primarily in the United States. They serve both residential and commercial customers, focusing on reducing energy costs and promoting sustainability through renewable energy solutions. Solar Energy World offers a thorough installation process, which includes a free solar analysis, site assessment, and ongoing monitoring services to ensure optimal performance of solar systems. Their product offerings include a variety of solar panels and batteries, and they emphasize the importance of local solar incentives and regulations in their service areas. The company has built a reputation for customer satisfaction, as evidenced by positive testimonials from clients who have experienced significant reductions in their energy bills. They also provide financing options to make solar energy more accessible to homeowners and businesses alike.
3. Renewable Energy Corporation
- Website: renewableenergysolar.net
- Ownership type: Family Owned
- Headquarters: Timonium, Maryland, United States (USA)
- Founded year: 2002
- Headcount: 1-10
- LinkedIn: renewable-energy-corporation
Renewable Energy Corporation, based in Timonium, Maryland, is a family-owned solar energy provider established in 2002. The company specializes in solar panel installation and offers a range of services aimed at helping homeowners and businesses reduce their energy costs and environmental impact. They provide products such as solar panels, battery backups, and energy efficiency solutions. Operating primarily in Maryland and extending into Virginia, Pennsylvania, and Delaware, Renewable Energy Corporation has built a reputation for quality service and customer satisfaction. Their collaboration with industry-leading manufacturers, including QCELLS, allows them to offer high-efficiency solar products. The company prides itself on its experienced team and commitment to empowering clients with sustainable energy solutions. With a focus on both economic and environmental benefits, Renewable Energy Corporation continues to play a significant role in the solar energy sector.
4. CI Renewables
- Website: cirenew.com
- Ownership type: Private
- Headquarters: Baltimore, Maryland, United States (USA)
- Employee distribution: United States (USA) 100%
- Founded year: 2010
- Headcount: 11-50
- LinkedIn: kdc-solar
CI Renewables, based in Baltimore, Maryland, is a private company specializing in solar energy solutions. Since its inception in 2010, CI Renewables has focused on developing, owning, and operating solar power projects tailored for commercial, governmental, and educational clients. The company has successfully constructed over 200 megawatts of solar capacity across 45 projects, generating more than 260 million kilowatt-hours of clean energy. Their services cover the entire project lifecycle, including early-stage development, financing, construction, and ongoing asset management. CI Renewables is also pioneering agrivoltaics, integrating solar energy production with agricultural practices, which reflects their commitment to innovative and sustainable energy solutions. Their team, with over 160 years of collective experience in the renewable energy sector, emphasizes quality and customer collaboration, ensuring that projects meet the highest standards.
5. Power Factor
- Website: powerfactorco.com
- Ownership type: Family Owned
- Headquarters: Dundalk, Maryland, United States (USA)
- Employee distribution: United States (USA) 100%
- Founded year: 2013
- Headcount: 51-200
- LinkedIn: power-factor
Power Factor is a family-owned solar energy and electrical services company based in Dundalk, Maryland, with a strong focus on the Baltimore area. Since its inception in 2013, the company has specialized in the installation of solar panels for both residential and commercial properties. With a dedicated team of over 50 employees, Power Factor has successfully completed more than 1,800 residential installations and has deployed over 35 megawatts of solar energy solutions. Their services extend beyond solar installations to include electrical services, ensuring a comprehensive approach to energy needs. Power Factor is committed to helping homeowners and businesses reduce energy costs while promoting sustainability. They also provide financing options to facilitate the adoption of solar energy, making it accessible to a broader audience. The company prides itself on transparency, with no hidden fees, and offers 24/7 emergency services, showcasing their dedication to customer service and reliability.
6. Energy Select
- Website: energyselectllc.com
- Ownership type: Private
- Headquarters: Leonardtown, Maryland, United States (USA)
- Employee distribution: United States (USA) 100%
- Founded year: 2002
- Headcount: 11-50
- LinkedIn: energyselect
Energy Select LLC, based in Leonardtown, Maryland, is a solar energy provider that has been serving residential and commercial customers since its founding in 2002. The company focuses on renewable energy solutions, offering a range of services including solar panel installation, battery backup systems, and energy analysis. Their mission is to assist clients in reducing energy costs while transitioning to sustainable energy sources. Energy Select operates primarily in Southern and Western Maryland, extending its services to parts of Virginia and West Virginia. The company prides itself on delivering tailored solar solutions that not only save money but also contribute to a healthier planet. Their commitment to sustainability is evident in their operational practices and customer engagement. Energy Select is also a member of the Amicus Solar Co-Op, which allows them to collaborate with other solar companies to enhance service delivery and community impact.
7. Standard Energy Solutions
- Website: standardenergysolutions.com
- Ownership type: Private
- Headquarters: Columbia, Maryland, United States (USA)
- Employee distribution: United States (USA) 100%
- Founded year: 2004
- Headcount: 51-200
- LinkedIn: standard-energy-solutions
Standard Energy Solutions, based in Columbia, Maryland, is a private solar energy contractor that has been operational since 2004. The company specializes in renewable energy solutions, particularly solar panel and battery storage installations. With a workforce of approximately 32 employees, they have successfully installed over 5,000 residential solar systems, totaling more than 50 million watts of solar capacity. Their services extend beyond installation; they also offer project management and various financing options tailored to meet the needs of homeowners and businesses. Operating across six states, including Maryland, Virginia, and New Jersey, Standard Energy Solutions is dedicated to fostering partnerships and delivering high-quality services in the renewable energy sector. Their focus on community and customer satisfaction positions them as a reliable choice for solar energy solutions.
8. Sunrock Distributed Generation
- Website: sunrockdg.com
- Ownership type: Private
- Headquarters: Baltimore, Maryland, United States (USA)
- Employee distribution: United States (USA) 100%
- Latest funding: $10.0M, May 2022
- Founded year: 2022
- Headcount: 11-50
- LinkedIn: sunrock-distributed-generation
Sunrock Distributed Generation is a private renewable energy solutions company based in Baltimore, Maryland, specializing in solar energy. Founded in 2022, the company offers a range of services including solar project development, financing options, and asset management tailored for businesses and organizations across various sectors such as healthcare, education, and retail. Sunrock aims to help clients reduce energy costs and improve sustainability through effective solar installations. The company has recently received $10 million in funding, which supports its growth and operational capabilities. With a focus on customer-centric solutions, Sunrock is positioned to make a significant impact in the solar energy market.
9. New Energy Equity
- Website: newenergyequity.com
- Ownership type: Corporate
- Headquarters: Annapolis, Maryland, United States (USA)
- Employee distribution: United States (USA) 100%
- Latest funding: $165.5M, March 2022
- Founded year: 2013
- Headcount: 51-200
- LinkedIn: new-energy-equity
New Energy Equity, based in Annapolis, Maryland, is a solar energy developer and finance company that specializes in the comprehensive development and management of solar projects. Since its inception in 2013, the company has focused on providing a full suite of services, including project financing, engineering, construction, and ongoing operation and maintenance. They cater to a variety of clients, including government entities, commercial businesses, and non-profit organizations, reflecting their adaptability in the market. New Energy Equity has successfully completed over 250 solar projects, generating more than 310 megawatts of power, which translates to significant environmental benefits, such as the avoidance of millions of pounds of CO2 emissions. The company has also secured substantial funding, with a notable amount of $165.5 million raised in 2022, underscoring its growth trajectory and the confidence investors have in its operations. Their commitment to clean energy and the transformation of the energy sector is evident in their extensive project portfolio and strategic partnerships.
10. SuperGreen Solutions
- Website: supergreensolutions.com
- Ownership type: Private
- Headquarters: Bel Air, Maryland, United States (USA)
- Employee distribution: United States (USA) 88%, Australia 12%
- Founded year: 2010
- Headcount: 51-200
- LinkedIn: supergreensolutions
SuperGreen Solutions, based in Bel Air, Maryland, is a private company that specializes in renewable energy solutions tailored for homeowners and businesses. Established in 2010, the firm focuses on solar energy, providing a range of services that include residential and commercial solar installations, EV charging stations, and LED lighting solutions. Their mission is to help clients reduce energy costs while promoting sustainability through clean energy technologies. With a workforce of around 40 employees, SuperGreen Solutions operates primarily in the United States, with a small presence in Australia. The company is dedicated to enhancing the quality of life for its customers by lowering energy expenses and ensuring exceptional service through a reliable installation process. They offer flexible financing options and emphasize the importance of tax incentives and rebates to make solar energy more accessible. SuperGreen Solutions has built a reputation for quality installations and customer satisfaction, making them a relevant player in the solar energy market.
11. Advanced Solar
- Website: advanced.solar
- Ownership type: Private
- Headquarters: Hyattsville, Maryland, United States (USA)
- Employee distribution: United States (USA) 96%, Costa Rica 4%
- Founded year: 2009
- Headcount: 51-200
- LinkedIn: advanced-solar-2009
Advanced Solar, founded in 2009 and based in Hyattsville, Maryland, is a private solar energy provider dedicated to delivering renewable energy solutions tailored for residential, commercial, and agricultural clients. The company specializes in solar panel installations and energy efficiency upgrades, aiming to make solar energy accessible to all, particularly low-income households. Advanced Solar operates primarily in Washington D.C. and Maryland, where they have established a significant presence. Their involvement in the DC Solar For All program underscores their commitment to increasing solar access for low-income residents, providing free solar panel installations and energy efficiency upgrades. With a workforce of 51-200 employees, Advanced Solar has garnered a reputation for quality service, as reflected in their numerous positive customer reviews. They are licensed and compliant with local regulations, ensuring that their installations meet industry standards.
12. Solar-verse
- Website: solar-verse.com
- Ownership type: Private
- Headquarters: Millersville, Maryland, United States (USA)
- Employee distribution: United States (USA) 100%
- Founded year: 2017
- Headcount: 11-50
- LinkedIn: solar-verse
Solar-verse, based in Millersville, Maryland, is a private solar energy provider that specializes in solar panel installation for both residential and commercial clients. Established in 2017, the company has carved out a niche in the solar market by offering a variety of services, including energy storage solutions and utility-scale solar projects. Solar-verse prides itself on its partnerships with local installers, ensuring high-quality products and professional installation tailored to the specific needs of its customers. The company emphasizes customer satisfaction and aims to help clients reduce their energy costs while promoting sustainable energy practices. With a dedicated team of 11-50 employees, Solar-verse is committed to making solar energy accessible and affordable for homeowners and businesses alike.
13. Sustainable Energy Systems, LLC
- Website: sustainableenergysystems.net
- Ownership type: Family Owned
- Headquarters: Frederick, Maryland, United States (USA)
- Employee distribution: United States (USA) 100%
- Founded year: 2008
- Headcount: 11-50
- LinkedIn: sustainable-energy-systems-llc
Sustainable Energy Systems, LLC, based in Frederick, Maryland, is a family-owned renewable energy company that has been operating since 2008. The firm specializes in solar energy solutions, providing design and installation services for various types of solar systems, including grid-tied, battery backup, and off-grid configurations. Catering to both residential and commercial customers, they have successfully installed over 1,000 solar arrays, showcasing their experience and commitment to the industry. The company prioritizes local hiring and actively supports renewable energy employment programs at local universities, reflecting their dedication to community engagement. Their goal is to create a sustainable energy future by delivering efficient and cost-effective solar installations with minimal ecological impact.
14. American Sentry Solar
- Website: americansentrysolar.com
- Ownership type: Private
- Headquarters: Bel Air, Maryland, United States (USA)
- Employee distribution: United States (USA) 100%
- Founded year: 2009
- Headcount: 51-200
- LinkedIn: american-sentry-solar
American Sentry Solar, based in Bel Air, Maryland, is a private company that specializes in solar panel installation services. Founded in 2009, the company has carved out a niche in the residential solar market, primarily serving homeowners in Maryland, Delaware, and Pennsylvania. With a team of certified professionals, American Sentry Solar offers customized solar energy solutions designed to reduce electric bills and enhance energy efficiency. They manage the entire installation process, including permits and paperwork, ensuring a hassle-free experience for their clients. The company prides itself on using high-quality solar panels and equipment, backed by a 25-year warranty. Their commitment to customer support extends beyond installation, providing ongoing maintenance and monitoring services to ensure optimal system performance. American Sentry Solar has helped thousands of homeowners transition to solar energy, reflecting their significant involvement in promoting renewable energy solutions in their region.
15. Gordian Energy Systems
- Website: gordianenergysystems.com
- Ownership type: Family Owned
- Headquarters: Baltimore, Maryland, United States (USA)
- Employee distribution: United States (USA) 100%
- Founded year: 2019
- Headcount: 51-200
- LinkedIn: gordian-energy
Gordian Energy Systems, based in Baltimore, Maryland, is a family-owned solar energy company founded in 2019. The firm specializes in solar construction and engineering services, offering solutions that include commercial rooftop solar installations, solar canopies, and ground mount solar systems. Gordian Energy Systems primarily serves businesses and organizations aiming to reduce energy costs and enhance sustainability through renewable energy. The company has a strong foundation in the construction industry, having evolved from a planned extension of Cole Roofing Company, which has a century-long reputation for quality workmanship. Gordian's team is dedicated to delivering high-quality solar projects, leveraging their engineering expertise to ensure that installations are efficient and effective. Their portfolio includes notable projects like the 595 kW DC solar array at the Maryland SoccerPlex and participation in community solar initiatives, showcasing their commitment to advancing solar energy solutions in the region.
16. Aurora Energy, Inc.
- Website: aurora-energy.com
- Ownership type: Private
- Headquarters: Columbia, Maryland, United States (USA)
- Employee distribution: United States (USA) 100%
- Founded year: 1994
- Headcount: 11-50
- LinkedIn: aurora-energy-inc.
Aurora Energy, Inc., based in Columbia, Maryland, is a commercial solar energy provider that has been active since 1994. The company specializes in creating custom solar solutions for businesses and organizations, offering a comprehensive suite of services that includes engineering, installation, and ongoing maintenance of solar energy systems. Aurora Energy aims to help clients achieve their sustainability goals while also reducing energy costs. Their operations are primarily concentrated in the Mid-Atlantic region, where they serve various sectors, including real estate and agriculture. The company has successfully completed numerous projects, demonstrating their expertise in handling complex solar installations. Their portfolio includes significant projects like the solar array for United Therapeutics, showcasing their capability to deliver innovative and effective solar solutions. Aurora Energy's focus on customer needs and their extensive experience in the industry position them as a relevant player in the solar power market.
17. Green World Renewable Energy LLC
- Website: greenworld-energy.com
- Ownership type: Private
- Headquarters: Baltimore, Maryland, United States (USA)
- Employee distribution: India 94%, United States (USA) 5%, Other 1%
- Founded year: 2016
- Headcount: 201-500
- LinkedIn: gwre
Green World Renewable Energy LLC, founded in 2016 and based in Baltimore, Maryland, is a private company focused on solar energy solutions. The firm offers a range of services including solar proposals, site surveys, and permit design, catering to both residential and commercial customers. With a mission to facilitate the transition to renewable energy, Green World aims to help clients lower their energy costs while minimizing their environmental footprint. The company has a notable track record, having designed over 1000 MW of solar projects, which reflects their expertise in solar design and permitting services. Their operational model includes a significant workforce in India, which supports their service delivery across the United States. Green World Renewable Energy is ISO 14001:2015 and ISO 9001:2015 certified, underscoring their commitment to quality and environmental management. They are also a member of the Solar Energy Industries Association, further solidifying their involvement in the solar industry.
18. Solar Energy Services, Inc.
- Website: solarsaves.net
- Ownership type: Private
- Headquarters: Millersville, Maryland, United States (USA)
- Employee distribution: United States (USA) 87%, Israel 13%
- Founded year: 2006
- Headcount: 11-50
- LinkedIn: solar-energy-services-inc.
Solar Energy Services, Inc. is a private solar energy service provider based in Millersville, Maryland. Established in 2006, the company specializes in the installation and maintenance of solar energy systems for both residential and commercial clients. With a strong foundation built on over 40 years of industry experience, the team at Solar Energy Services is dedicated to delivering sustainable energy solutions that help customers reduce their energy costs while taking advantage of available solar incentives. The company operates mainly in the Mid-Atlantic region, where it has developed a reputation for providing customized solar solutions that meet the unique needs of its clients. Their services include comprehensive project management, from initial consultation to installation and ongoing maintenance, ensuring that customers receive reliable support throughout their solar journey. Solar Energy Services also emphasizes the importance of safety, integrity, and continuous improvement, which are core values that guide their operations. They have a long-standing commitment to the solar industry, often stepping in to service systems installed by other companies, showcasing their expertise and reliability in the field.
19. EDGE Energy
- Website: edge-gogreen.com
- Ownership type: Private
- Headquarters: Beltsville, Maryland, United States (USA)
- Employee distribution: United States (USA) 100%
- Founded year: 2006
- Headcount: 51-200
- LinkedIn: edge-energy
EDGE Energy, based in Beltsville, Maryland, is an energy solutions provider that specializes in solar energy and HVAC services. Founded in 2006, the company has built a solid reputation in the DMV area, offering a range of services that include solar panel installation, energy audits, and home improvements aimed at enhancing energy efficiency. With a workforce of approximately 66 employees, EDGE Energy has successfully completed over 5,000 projects, demonstrating their operational capacity and commitment to customer satisfaction. The company has been recognized as a six-time ENERGY STAR® Contractor of the Year, reflecting its dedication to high performance and quality service. Their clientele includes both homeowners and businesses looking to reduce energy costs and transition to renewable energy sources, positioning them as a relevant player in the solar power industry.
20. SolarGaines
- Website: solargaines.com
- Ownership type: Private
- Headquarters: Cockeysville, Maryland, United States (USA)
- Employee distribution: United States (USA) 100%
- Founded year: 2009
- Headcount: 51-200
- LinkedIn: solar-gaines-llc
SolarGaines, LLC is a commercial solar construction company based in Cockeysville, Maryland, with a focus on delivering solar energy solutions across the Mid-Atlantic region, including Virginia, Maryland, D.C., Pennsylvania, and Delaware. Established in 2009, the company has roots in the construction industry dating back to the 1980s, which provides them with a solid foundation for executing large-scale solar projects. SolarGaines offers a comprehensive range of services, including engineering, procurement, construction, and ongoing operations and maintenance of solar systems. Their portfolio includes various community solar initiatives and commercial installations, showcasing their capability to manage projects of varying complexity. The company prides itself on using high-quality materials and maintaining a strong commitment to customer service, ensuring that clients receive tailored solutions that maximize their investment in renewable energy.
21. Neighborhood Sun
- Website: neighborhoodsun.solar
- Ownership type: Venture Capital
- Headquarters: Silver Spring, Maryland, United States (USA)
- Employee distribution: United States (USA) 100%
- Latest funding: Seed, $1.5M, December 2022
- Founded year: 2016
- Headcount: 11-50
- LinkedIn: neighborhood-sun
Neighborhood Sun, founded in 2016 and based in Silver Spring, Maryland, is a community solar service provider dedicated to making renewable energy accessible to all. The company allows individuals and households to subscribe to local solar farms, enabling them to benefit from reduced electricity costs while supporting clean energy initiatives. Neighborhood Sun operates in several states, including Maryland, Colorado, New York, and New Jersey, and has successfully saved its subscribers over $6 million on electricity bills. The company is also committed to social equity, offering additional support to low-income households through its SHARE program. As a Certified B Corporation, Neighborhood Sun meets high standards of social and environmental performance, demonstrating its commitment to using business as a force for good. The company has received $1.5 million in funding as of December 2022, indicating investor confidence in its business model and growth potential.
22. Hasi
- Website: hasi.com
- Ownership type: Private
- Headquarters: Annapolis, Maryland, United States (USA)
- Employee distribution: United States (USA) 99%, Other 1%
- Latest funding: $90.5M, June 2016
- Founded year: 1981
- Headcount: 51-200
- LinkedIn: hannon-armstrong
Hasi, based in Annapolis, Maryland, is an investment firm focused on climate solutions and renewable energy. Founded in 1981, the company manages over $12 billion in assets, targeting projects that enhance energy efficiency and promote renewable sources like solar and wind energy. Hasi's investment strategy is centered on generating attractive returns while contributing positively to the climate. They have a robust portfolio that includes significant investments in solar energy, such as a 605 MW portfolio of solar and solar-plus-storage assets across various states and a 131 MW portfolio of distributed solar projects. Their approach combines equity investments, joint ventures, and financing transactions, showcasing their commitment to advancing solar energy and reducing carbon emissions. Hasi's clients include businesses and organizations aiming to improve their sustainability efforts, making them a notable entity in the renewable energy sector.
Solar Energy Insights: Key Companies in Maryland
| Company | Headquarter | Size | Founded | Ownership |
|---|---|---|---|---|
| Vivint Solar | Beltsville, Maryland, United States (USA) | 5001-10000 | 2011 | Corporate |
| Solar Energy World | Laurel, Maryland, United States (USA) | 201-500 | 2009 | Private |
| Renewable Energy Corporation | Timonium, Maryland, United States (USA) | 1-10 | 2002 | Family Owned |
| CI Renewables | Baltimore, Maryland, United States (USA) | 11-50 | 2010 | Private |
| Power Factor | Dundalk, Maryland, United States (USA) | 51-200 | 2013 | Family Owned |
| Energy Select | Leonardtown, Maryland, United States (USA) | 11-50 | 2002 | Private |
| Standard Energy Solutions | Columbia, Maryland, United States (USA) | 51-200 | 2004 | Private |
| Sunrock Distributed Generation | Baltimore, Maryland, United States (USA) | 11-50 | 2022 | Private |
| New Energy Equity | Annapolis, Maryland, United States (USA) | 51-200 | 2013 | Corporate |
| SuperGreen Solutions | Bel Air, Maryland, United States (USA) | 51-200 | 2010 | Private |
| Advanced Solar | Hyattsville, Maryland, United States (USA) | 51-200 | 2009 | Private |
| Solar-verse | Millersville, Maryland, United States (USA) | 11-50 | 2017 | Private |
| Sustainable Energy Systems, LLC | Frederick, Maryland, United States (USA) | 11-50 | 2008 | Family Owned |
| American Sentry Solar | Bel Air, Maryland, United States (USA) | 51-200 | 2009 | Private |
| Gordian Energy Systems | Baltimore, Maryland, United States (USA) | 51-200 | 2019 | Family Owned |
| Aurora Energy, Inc. | Columbia, Maryland, United States (USA) | 11-50 | 1994 | Private |
| Green World Renewable Energy LLC | Baltimore, Maryland, United States (USA) | 201-500 | 2016 | Private |
| Solar Energy Services, Inc. | Millersville, Maryland, United States (USA) | 11-50 | 2006 | Private |
| EDGE Energy | Beltsville, Maryland, United States (USA) | 51-200 | 2006 | Private |
| SolarGaines | Cockeysville, Maryland, United States (USA) | 51-200 | 2009 | Private |
| Neighborhood Sun | Silver Spring, Maryland, United States (USA) | 11-50 | 2016 | Venture Capital |
| Hasi | Annapolis, Maryland, United States (USA) | 51-200 | 1981 | Private |
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