Keywords: Swansons-law de.png en The green line shows Swanson's law a 20 decrease in price for every doubling of cumulative shipped photovoltaics The blue line shows actual world wide module shipments vs average module price from 1976 to 2014 Prices are in 2011 dollars Data is from Figure 1 http //www itrpv net/Reports/Downloads/2015/ ITRPV Edition 2015 compare to current spot-market prices http //pv energytrend com/pricequotes html here 2014-07-13 own Delphi234 <table><tr><td>thumb SVG</td><td>thumb English</td><td>thumb French</td></tr><tr><td>thumb Japanese</td><td>thumb Polish</td><td>thumb Chinese</td></tr></table> cc-zero Uploaded with UploadWizard Photovoltaics Learning curve |