Currently, electric power systems are experiencing increasing trends for solar and wind generation penetration, which are intermittent sources by nature. For electric power systems that have aggressive goals for these intermittent generation, energy storage will place a key role in order to maintain within acceptable limits key operational variables such as frequency and voltage. Also the electric power systems are experiencing increasing grid congestion and difficulties to build new transmission infrastructure to reliably serve the load. This panel will focus on key electric power system problems that can be solved by energy storage. The presentation will include the regulatory aspect of energy storage and will emphasize the importance to recognize that energy storage is a multi-purpose, multi- service asset and revenue streams should be recognized by type of service which may cross generation, transmission or distribution. The panel will share international perspectives of energy storage, success stories and future vision.