Depletion of fossil energy sources, rising energy prices and government regulation coerces manufacturing companies to foster their energy-efficiency. Among others, Information and communication technologies (ICT) are considered to be major enablers for improving the energy-efficiency. In this paper a concept for energy-efficiency based on an Event-driven Architecture (EDA) using Complex-Event-Processing (CEP) is presented that supports the integration of sensor data from the shop-floor level into the company’s decision support systems. Finally, a use-case for implementing the proposed concept in a real production environment is presented.