Renewable Energy Systems (RES) are essential for sustainable development of the society. Since the nature of some RES is intermittent, the reliability of a RES increases, working with hybrid renewable energy systems. This paper proposes to use intelligent technologies to optimally size a hybrid renewable energy system using solar and wind power. User will establish the system configuration, providing or not grid connection, battery storage and the optimization approaches. Experimental results and conclusions emphasizing the advantages of intelligence optimization techniques for the improvement of hybrid renewable energy systems are presented.