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Vehicle to grid (V2G) describes a system in which power can be fed back to the electrical power grid from an electric drive vehicle (EDV) when connected to the grid and not in use. Alternatively, when the vehicle batteries need to be charged, the flow can be reversed and electricity can be drawn from the electrical power grid to charge the battery. Taking into account the specific features of the EDV battery energy storage system, a MATLAB simulator has been developed by the authors to model the scenarios of V2G deployment within a daily power dispatch schedule. Different characteristics of EDV battery energy storage system and test scenarios can be set up by the user. The power networks modeled in the simulator are standard IEEE-30, -57 and -118 bus systems. The simulator provides a tool to investigate the effects of V2G implementation across a wide scope of the economic and technical issues, with respect to the physical power grid operation.