Dipl.-Ing. Georg Bopp got his diploma in electrical engineering in 1981 from the university Stuttgart. Since 1982 he works as scientist at the Fraunhofer Institute for Solar Energy. 1994 2001 head of the group PV Standalone Systems. 2002-2005 management of the Demo center Fraunhofer Solar Building Innovation Center. Since 2005 senior scientist in the department PV Off - Grid Solutions and Battery System Technology. Since 2013 head of the team Autonomous Systems and Mini-Grids. A lot of experience with PV Off - Grid Solutions especially with batteries and battery control and operation.