Day ahead optimization of an electric vehicle fleet providing ancillary services in the Los Angeles Air Force Base vehicle-to-grid demonstration

•We present an overview of an ongoing EV vehicle-to-grid demonstration project.•We discuss practical issues of bidding EV capacity in frequency regulation markets.•We formulate a MILP optimization model to plan EV charging and day-ahead bidding.•We analyze the model sensitivity and bidding strategy to variation of key inputs.•Model behavior is highly sensitive to predicted resource utilization and prices.