I've only skimmed this document but it appears reasonable. It's aimed at assessing PV lifetime panel costs and is specifically intende= d to show how Sunpower's high efficiency cells are better than thin film, wit= h tracking in each case, BUT would allow Stirling comparisons to be made and allows a better view of true PV costs than are usually provided. The drivers of the levelized cost of electricity for Utility Scale Photovoltaics - LCOE_Final_081408.pdf http://files.shareholder.com/downloads/SPWR/991790477x0x223178/61DF3B4E-C0E= 0-454D-BCF8-969C97E2D495/LCOE_Final_081408.pdf --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .