The series of IRES conferences has emerged as a leading forum for the discussion of the pressing problems with renewable energy storage by drawing together one of the largest gatherings of scientific and economic experts worldwide. Now the participants can choose from even more extensive options. Running in Dusseldorf for the first time, IRES 2015 is being held as a concurrent event with ENERGY STORAGE EUROPE (Conference & Expo) and the 4th Conference Power-to-Gas Conference (OTTI e.V.). Furthermore, there will be a tradeshow with approx. 80 exhibitors. The three conferences and the exhibition will take place March 9 to 11, 2015 at the Trade Fair Dusseldorf, Germany.