“Tracking the Sun IV: An Historical Summary of the Installed Cost of Photovoltaics in the United States from 1998 to 2010.”

 This report provides a comprehensive summary of installed cost trends for grid-connected solar photovoltaic (PV) systems in the United States from 1998 through 2010, and provides preliminary cost trends for systems installed in 2011. The report, which updates three previous editions of the report series, is based on project-level data from approximately 116,500 PV systems, totaling 1,685 MW of capacity and representing 79% of all grid-connected PV capacity installed in the United States through 2010. The report also includes, for the first time, a separate analysis of utility-sector PV cost trends.

 In addition to describing temporal trends, the report also describes trends in installed costs by system size; by component; between the United States, Germany, and Japan; among individual states; between customer-owned and third party-owned systems; and among customer types, applications, and technologies. The report also describes trends in financial incentive levels and the associated impact of those trends on the net installed cost of PV after receipt of incentives.

 The report, along with a PowerPoint briefing and associated data file, can be downloaded from:


 This report was funded with support of the U.S. Department of Energy’s Solar Energy Technologies Program, and the Clean Energy States Alliance.