entities facilities. Its set of services includes upgrades to a facility's energy infrastructure. Ameresco provides renewable energy products and services that include the construction of small-scale plants that produce electricity, gas, heat, or cooling from renewable sources of energy; the sale of such electricity, processed landfill gas, heat, or cooling from plants that it owns; and the sale and installation of solar energy products and systems for both on-grid and off-grid applications. It 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 was founded in 2000 and is headquartered in Framingham, Massachusetts.