Ameresco Inc provides energy efficiency solutions for facilities in North America and Europe. It focuses on projects that reduce energy, also focuses on the operations and maintenance costs of governmental, educational, utility, healthcare, and other institutional, commercial, and industrial entities facilities. Ameresco distributes solar energy products and systems, such as PV panels, solar regulators, solar charge controllers, inverters, solar-powered lighting systems, solar-powered water pumps, solar panel mounting hardware, and other system components. The company's segment includes U.S. Regions; U.S. Federal; Canada; Alternative Fuels; Non-Solar DG and All Other. It derives a majority of revenue from the U.S. Regions segment.