This is a presentation by Meg Gottstein at the international seminar: “A La Luz de Un Cambio” sponsored by the Universidad Adolfo Ibáñez and Empresas Eléctricas A.G. in Santiago, Chile in November 2008.(English version). Topics covered in this presentation include what an Efficiency Power Plant (EPP) is and what its advantage are, what California’s experience is with investments in EPPs, how California plans, finances and builds EPPs, the approaches other states take, and the key components for the successful implementation of EPPs.