Electrical Generating Systems Association (EGSA)The Electrical Generating Systems Association (EGSA) is the world’s largest organization exclusively dedicated to On-Site Power Generation. The Association is comprised of over 550 companies—Manufacturers, Distributor/Dealers, Contractors/Integrators, Manufacturer’s Representatives, Consulting and Specifying Engineers, Service firms, End-Users and others—throughout the U.S. and around the world that make, sell, distribute and use On-Site Power generation technology and equipment, including generators, engines, switchgear, controls, voltage regulators, and governors.