The installed cost of solar photovoltaic (PV) power systems in the United States fell substantially in 2010 and into the first half of 2011, according to a report released on September 15 by DOE’s Lawrence Berkeley National Laboratory (LBNL). The average installed cost of residential and commercial PV systems completed in 2010 fell by roughly 17 percent from 2009, and by an additional 11 percent within the first six months of 2011. The reductions reflect the drop in both the cost of PV modules as well as non-module costs such as installation labor, marketing, overhead, inverters, and the balance of systems. According to the report, “Tracking the Sun IV: A Historical Summary of the Installed Cost of Photovoltaics in the United States from 1998 to 2010,” average non-module costs for residential and commercial systems declined by roughly 18 percent from 2009 to 2010.
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