Storage/Batteries/ Stationary Storage/Flywheels

31 Oct 2016 http://www.wiwo.de/technologie/green/tech/alte-speichertechnologie-start-up-entdeckt-das-schwungrad-wieder/14754416.html. A German start-up uses an old system, the flywheels, to store energy. Flywheels work with weight, the new flywheels replace weight by faster turns.