The following is an extract from a recent study by Lawrence Berkeley National Labs and National Renewable Energy Laboratory. The report is a high-level overview of historical, recent, and projected near-term PV system pricing trends in the United States, drawing on several ongoing research activities at LBNL and NREL. Prices are subject to the location, suppliers, pricing, as well as local economic factors. According to the report near future analysts expect system prices to continue to fall, but for module prices to stabilize (Module ASP projected to be between $0.50/W – $0.75/W by 2014 ).
Modeled overnight capital cost for systems quoted in Q4 2012 (expected to be installed in 2013):
Residential (5.1 kW) was $3.69/W, a reduction of 13% from Q4 2011
Commercial (222.5 kW) was $2.61/W, a reduction of 19% from Q4 2011
Utility-scale (192.8 MW) was $1.92/W, a reduction of 23% from Q4 2011.
The report can be downloaded here