An investigation of terrestrial applications for the photovoltaic conversion of solar energy is summarized. The specific objectives of the study were: (a) to survey and evaluate near-term (1976--1985) civilian photovoltaic applications in the United States; (b) to evaluate the most promising major missions for the mid-term period (1986--2000) and to determine the conditions under which photovoltaic technology can compete in those applications at array prices consistent with ERDA goals; (c) to address critical external issues and identify the sensitivity of photovoltaic system technical requirements to such factors; and (d) to quantify the societal costs of alternative energy sources and identify equalizing incentives. The study was divided into six separate but interrelated tasks: Task 1, Analysis of Near-Term Applications; Task 2, Analysis of Major Mid-Term Missions; Task 3, Review and Updating of the ERDA Technology Implementation Plan; Task 4, Critical External Issues; Task 5, The Impact of Incentives; and Task 6, The Societal Costs of Conventional Power Generation. The emphasis of the study was on the first two of these tasks, the other four serving to provide supplementary information.