The concept of Eco-Maintenance aims to prolong the lifetime of the system to maintain while minimizing environmental losses due to maintenance. This concept is developed for Renewable Energy Production System (Reps) like Wind Turbines or Photovoltaic Panel. REPS generate clean and inexhaustible energy. However the production of this energy is unpredictable because it depends on the weather. Moreover failures that occur on the means of production make the operation less interesting. However the implementation of technical resources (fault detection sensor, vehicles and transfer system for technicians, tools and spare parts) improves the performance of the production system. In this paper a model for REPS with an application on Wind Energy Production system (Offshore Wind Farm + Maintenance Systems) was developed and simulations have been performed. Hence we show the importance to design and optimize the maintenance the REPS for reducing cost and environmental issues.