In this paper we present a Dynamic Energy Management System elaborated to share available electrical energy, provided by a battery less hybrid source (PV-Wind), between motor-pumps used in desalination process. This Dynamic Energy Management System is combined to Power Field Oriented Control to maintain DC bus voltage stability and to control electrical power of motor-pumps used for water pumping and/or reverse osmosis desalination. Simulation and practical results are demonstrated and discussed to evaluate the power sharing performances and "Water-Energy" cooperative control effectiveness.