28
Fig. 2.12 The graph of “Wind Vision: A New Era for Wind Power in the United States,
U.S. Department of Energy Wind Energy Technologies Office” has been processed. (Note: In the
Wind Vision, good to excellent sites’ are those with average wind speeds of 7.5 meters per second
(m/s) or higher at hub height. LCOE estimates the PTC)
Price history of silicon PV cells
in US$ per watt
90
80
70
60
50
40
30
20
10
$/watt
1977 1981 1985
1990
1995
2000
2005
2010
2015
$0.30
$76.00
Fig. 2.13 Fall in solar power generation costs. (Source: Bloomberg New Energy Finance &
pv.energytrend.com)
2 Progress on Vision 2050 Since 1995