The STORE project aims to improve energy efficiency and grid stability by developing an AI-based Smart Flexibility Energy Manager (SFEM) for supermarkets—major electricity consumers. The system integrates photovoltaic energy and electric vehicle (EV) charging infrastructure into daily supermarket operations, positioning them as future “energy hubs.” Conducted in Germany, Cyprus, and Tunisia, the project adapts to local conditions while pursuing seven core objectives, including AI-driven grid stabilization, energy storage optimization, and international knowledge exchange. Real and simulated data inform the development of innovative business models, with TH Ingolstadt coordinating the international consortium.