This is a very open analysis of Sumitomo Electric's 15MW/60MWh vanadium redox flow battery which started operation in December 2015.
The graph below shows testing of a full charge and discharge cycle every 6 seconds with no degradation
#VRFB #energy
https://t.co/hZ7A8wMPHn https://t.co/Wj5HUpOpIK