Energy storage systems aim to store electricity when the demand is low and provide stored electricity when the demand is high. For efficient grid operations and satisfying increasing customers’ demands, these systems should be distributed, and virtualized storages are essential to be dynamically allocated and operated for individual customers. Thus, this draft Recommendation provides the framework of distributed and virtualized energy storage systems. After identifying key characteristics and core technologies of energy storage systems, this draft Recommendation specifies roles of stakeholders associated to the energy value chain. Then, this draft Recommendation provides architectural overview specifying related interfaces and functional blocks. Finally, mechanisms for virtualization of energy storage systems are described.