This group has directed two editions (in the years 2015 and 2017) of an interesting course about the energy store which are celebrated in Madrid (Spain) coordinated by Mirian Bravo Taranilla (CIEMAT) and directed by Marcos Lafoz (CIEMAT). This course review the different existing technologies to store energy, grid connection regulation and potential effects. Furthermore, the course is also complemented with an introduction to environmental and safety issues. You can find more information in the page (2017) Principles of energy storage about the course imparted in the year 2017. Furthermore, you have available a registration formulary to receive news about energy storage if you are interested.