The principles of sustainable development emphasize the significance of the use of renewable energy resources in architecture. This paper is analyzing certain architectural characteristics of preschool facilities that are of the importance for theapplication and use of solar energy systems. It reviews all aspects of possible applications and use of these systems in this kind of facilities. The goal of the planned research is establishing practical, applicable model of the implementation and use ofsolar energy systems in existing preschools and kindergartens. The possibilities of solar energy systems application and use are reviewed based on suggested remodeled form of the preschool facilities in city of Nis, Serbia. In this article classification of active building-integrated solar systems and building-integrated photovoltaic (BIPV) technologies is presented. Application variants of solar energy systems for preschool facilities energy supply are considered. Optimization factors for application of solar energy systems in preschools facilities are given. Application and use of solar energy systems based on suggested remodeled form of the preschool facilities in city of Nis, Serbia are reviewed.