Clean Energy Solutions

Clean Energy Solutions, Inc.

Trusted advisors for the energy of the future.


Forging innovative solutions that move clean energy forward.

Clean Energy Solutions, Inc., known to many of our clients as simply CESI, is a consulting firm headquartered in Boston, MA with staff in Washington, DC and Asheville, NC. Our firm specializes in energy efficiency and renewable energy program and project design, with extensive knowledge in financing, state and local policy, and regulatory affairs. 

Our principals have been on the forefront of the clean energy movement for over 25 years and have assisted countless government, nonprofit, small business, and foundation clients formulate policies, programs, and business plans that conserve energy, reduce costs, and protect the environment. 

CESI has consulting arrangements with a substantial number of expert specialists, providing immediate access to a wide spectrum of energy-related disciplines. CESI is closely associated with the Peregrine Energy Group in Boston, with whom it shares corporate offices.