The need for deploying fast-charging stations for electric vehicles (EVs) is becoming essential in recent years. This need is justified by the increasing recharging demand, and supported by new recharging technologies making EV chargers more efficient. For this purpose, we introduce an optimization model for finding the optimal deployment of EV fast-charging stations through a network of highways, while taking into account their recharging demands and the restrictions imposed by the electric grid. We also consider the availability of local photovoltaic (PV) power station and integrate its energy to the proposed recharging network. In addition, we present a case study on Paris-Saclay area where the actual mobility flows and electric network specifications are considered. We thus provide the optimal locations for EV charging stations at the studied area, and we indicate the number of chargers to be deployed at each station. Finally, we study the potential benefits of integrating local PV energy and analyze its different prices and production costs.