Princeton Energy Systems is a specialty energy consulting, services and project development company focused on renewable energy, on-site cogeneration, advanced energy efficiency and energy management. In total, the Princeton Energy principals and associates have designed, developed, consulted on and/or installed over 600 MW of cogeneration and district energy systems as well as 35 MW of solar electric (photovoltaic or PV) projects for commercial, institutional, utility and government customers.  Princeton Energy's unique capability is developing projects that combine on-site cogeneration, renewable energy and advanced energy efficiency technologies in a manner that brings the greatest economic value and energy performance to facilities.