Plug-in electric and hybrid vehicles (PEVs) have the potential to provide substantial storage to a city's grid, a key component in mitigating intermittency issues of power sources. But the batteries of these vehicles also need to be charged at times when their users need them. Thus, V2G (vehicle-to-grid) is becoming an important issue in the future grid. An integrated treatment of this system, from power generation, monitoring, storage in stationary and PEV batteries to control is a complex task.