Ardani, Kristen, Galen L. Barbose, Robert Margolis, Ryan H. Wiser, David Feldman, and Sean Ong."Benchmarking Non-Hardware Balance of System (Soft) Costs for U.S. Photovoltaic Systems Using a Data-Driven Analysis from PV Installer Survey Results." (2012).
Ardani, Kristen, Galen L. Barbose, Robert Margolis, and David Feldman."Quantifying non-hardware balance of system costs for photovoltaic installations in the United States using a combined annual expenditure-labor hour productivity approach."2012 38th IEEE Photovoltaic Specialists Conference (2012) 001762 - 001767. DOI