We discuss the use of photovoltaic systems in the developing world and the problems hindering their widespread use. Three countries are considered when referring to Latin America, namely, Brazil, Mexico and Argentina. They each have different approaches to the dissemination of stand-alone PV power. Brazil relies entirely on the free market. Mexico has launched one of the world＇s largest rural electrification programs under the jurisdiction of the public electric utility. In Argentina, the approach combines a government policy and decisive intervention by the private sector. An official PV policy is essential for the successful implementation of photovoltaics in developing countries. The role of regional centers for the dissemination of solar technologies is discussed.