In July 2001 in the region of Kastri Platanistou in Evia, Greece a wind power park of 5 MWinstalled capacity, began its commercial power production under the supervision of the companyMELTEMI-KASTRI.During these 6 years of its operation significantly reduced incomes were recorded compared to theinitial study financial analysis. Apparently loss of income occurred due to technical failures;nevertheless more costly might have been a suboptimal primary energy analysis.Herein, the collected data from the nacelle of the wind turbines and a net installed in the site wereanalyzed in order to estimate the site’s wind energy potential and gain knowledge of the parametersthat so far affected the overall production. The analysis was performed through Windrose andWAsP software.Aiming to maximize the exploitation of the site’s wind energy potential, several wind turbinemodels in different installation points were examined. Further analysis of the exported resultsindicated the optimum scenario, finally suggested to the owners of the wind farm.