The usage of autonomous power-systems is one of the most successful ways to treat the electrification requirements of numerous isolated consumers, not only in Greece but also worldwide. Such an autonomous system comprises a micro-wind converter and a battery storage device, along with the corresponding electronic equipment. Considering the high wind potential of several regions in our country, an integrated study is carried out, based on long-term wind-potential experimental measurements, in order to determine the optimum configuration of a stand-alone wind power system. The proposed solution “guarantees” zero load rejections for all the 4-year period examined. For this purpose, two separate calculation approximations are developed, presenting almost similar results. Of course, the application of the “WINDREMOTE II” numerical code based on detailed measurements, gives almost analytical results concerning the energy autonomy and the operational status of the autonomous system components. Finally, by introducing preliminary financial aspects, it is possible to determine the optimum system dimensions on a minimum first-installation cost.