Top Renewable Energy Companies in Washington, DC (21)

GRID Alternatives is a national nonprofit dedicated to advancing economic and environmental justice by providing underserved communities with access to affordable solar power, clean mobility, and energy storage. They focus on reducing energy costs for low-income households and creating pathways to sustainable careers through comprehensive workforce development and job training in the renewable energy sector.

POET is the world's largest producer of ethanol and a leader in bioprocessing, focused on renewable energy and agricultural products.

Headquartered in Walnut Creek, Calif., Brown and Caldwell is an employee-owned firm with 2,100+ professionals serving clients locally and globally from 52 locations. We are the largest engineering and construction firm solely focused on the U.S. water and environmental sectors. Our creative designs and progressive solutions have helped municipal, federal and private organizations overcome their most complex environmental challenges. We offer...

The Sierra Club is the largest and most influential grassroots environmental organization in the United States. For over 130 years, it has worked to promote clean energy, safeguard community health, protect wildlife, and preserve wild places. Through grassroots activism, public education, lobbying, and legal action, the organization mobilizes millions of members and supporters to defend the right to a healthy...

Distributed Sun (DSUN) is a renewable energy services provider and solar developer founded in 2009. The company develops, constructs, finances, and operates commercial, community, and utility-scale solar projects and distributed generation. It specializes in integrating solar solutions with adjacent technologies, such as energy storage and microgrids, and provides tax equity syndication to help enterprises achieve ambitious decarbonization goals and optimize...

Deep Isolation offers an innovative solution to secure and dispose of spent nuclear fuel from commercial nuclear reactors. Our horizontal drill hole technology offers both safety and low cost. While the drilling technology is standard, Deep Isolation is the first company proposing to use this method for the safe isolation of spent nuclear fuel under a billion tons of rock...

Advanced Energy United is a national industry association representing businesses that deliver advanced energy and transportation solutions. It educates, advocates, and activates in decision-making venues nationwide, working with member companies, policymakers, regulators, and market stakeholders. The organization promotes competition, economic opportunity, lower consumer costs, energy reliability, resilience, and policies supporting a secure, clean, affordable energy system and a 100% clean-energy...

ACORE is a national nonprofit organization that unites finance, policy, and technology to accelerate the transition to a clean energy economy. It promotes investment in American clean energy infrastructure, development, and innovation.

The AES Corporation is a Fortune 500 global energy company that develops, owns, and operates power generation and utility infrastructure. It focuses on accelerating the future of energy by providing clean energy solutions through a diverse portfolio of solar, wind, hydro, and battery storage assets, serving millions of customers across multiple continents to facilitate a net-zero future.

OneEnergy Renewables is an innovative developer of community and utility-scale solar energy projects in North America. Powered by the belief that the future will run on clean energy, our team delivers solar projects to communities, utilities, and commercial and institutional customers. We build trust with landowners, communities, and customers to help them achieve a cleaner, brighter energy future.

Edelman Heating, Cooling, Plumbing, Electric & Solar is a family-owned business that has provided high-quality HVAC, plumbing, electrical, and solar solutions to homes and businesses across Illinois and Wisconsin for over 20 years. Specializing in installation, repair, and maintenance, they employ NATE-certified technicians and are committed to 100% customer satisfaction, ensuring reliable home comfort services for their residential and commercial...

DC Green Bank is an independent instrumentality of the District of Columbia, established to increase private investment in sustainable projects including clean energy, transportation, and green infrastructure. By providing access to capital for residents, businesses, and community institutions, the bank aims to grow the clean economy and develop a more equitable, resilient, and sustainable District of Columbia.

Founded by Al Gore, The Climate Reality Project is a non-profit organization dedicated to solving the climate crisis. It works to catalyze a global solution by educating the public and mobilizing a global network of millions to demand urgent action and a just transition to a sustainable, net-zero future through grassroots leadership training and advocacy.

The Smart Electric Power Alliance (SEPA) is a nonprofit organization that envisions a carbon-free energy system that is safe, affordable, reliable, resilient and equitable. Our mission is to accelerate the electric power industry’s transformation to a modern energy future through education, research, standards, and collaboration. Since 1992, we have led electric stakeholders to solutions and strategies for their unique clean and modern...

The Solar Energy Industries Association (SEIA®) is the driving force behind solar energy and is building a strong solar industry to power America through advocacy and education. As the national trade association in the U.S., we represent all organizations that promote, manufacture, install and support the development of solar energy. SEIA works with its 1,000 member companies to champion the use...

Greenlight America is a non-profit organization dedicated to environmental education and supporting local groups in building utility-scale clean energy projects.

NASEO is the only national non-profit association for the governor-designated energy officials from each state and territory. Formed by the states in 1986, NASEO facilitates peer learning among state energy officials, serves as a resource for and about state energy offices, and advocates the interests of the state energy offices to Congress and federal agencies. The State and Territory Energy...

The Union of Concerned Scientists is an independent national nonprofit that uses science to protect our health, safety, and environment by advocating for practical solutions to global problems.

The American Public Power Association is a non-profit, non-partisan trade association representing approximately 2,000 community-owned electric utilities in the United States. Its mission is to advance the public policy interests of its members, provide services to ensure reliable and affordable electricity, and promote environmental protection. It serves as the national advocate for public power in Washington, D.C., and facilitates collaboration,...

NuScale has designed a new kind of nuclear power plant that is smarter, safer, cleaner, and more cost competitive than the large gigawatt nuclear power plants of the past. At the heart of the NuScale power plant is the NuScale Power Module™ (NPM), a small modular reactor (SMR) that brings together traditional components—the reactor vessel, steam generator, pressurizer, and containment—into a...