Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Bosch Solar Energy AG is a German wafer and solar cell manufacturer, based in Erfurt, which specialises in silicon-based pholtovoltaic products. The company consists of the divisions Silicon, Wafers, Solar Cells and Modules. It has been listed on the German stock exchange since 30 September 2005 and on 19 December 2005 its shares were admitted to the TecDAX. The enterprise was founded in 1997 as ErSol Solarstrom GmbH & Co. KG.