In October 2019 worldwide-distinguished academic and industrial experts had share their knowledge on energy storage during 4 days in Madrid. 1st SESDIM (sustainable energy storage days in Madrid) was held from October 8th to 11th and organized by CSIC. The event count with distinguished guests in the field of electrochemistry as Prof. Clare Gray, Prof. Ulrich Schubert, Prof. Ulrich Stimming among others. B5tec was there as a participant of the industry round table involved in an interested and enriching debate.(1st SESDIM)