This document discusses vehicle-to-grid (V2G) technology which allows electric vehicles to provide power to the electric grid during periods when they are parked and connected to the grid. V2G technology integrates electric vehicles into the smart grid and allows them to provide services like frequency regulation. It describes how V2G works by establishing communication between vehicles and charging stations that can then form a "virtual storage network" to provide balancing services to the electric grid. V2G provides benefits like improving power quality and reducing electric bills but requires standards and legislation to fully integrate electric vehicles into grid operations.