Smart Grid projects play a key role in shedding some light on how to move forward in this challenging transition. To this end, in 2011, the JRC launched the first comprehensive inventory of Smart Gird projects in Europe to collect lessons learned and assess current developments on Smart Grids in Europe [JRC 2011]. The final catalogue was published in July 2011 and included 219 Smart Grid and smart metering projects from EU27 Member States (including 24 smart metering pilots and roll-outs). The overall investment amounted to € 5 billion.