The paper presents a project that sets up to make energy consumption data visible and accessible to employees by providing dynamic situated consumption feedback at the workplace. Therefore a supporting infrastructure as well as two example applications have been implemented and evaluated. The resulting prototype fosters a ubiquitous learning process among the employees with the goal to change their consumption behaviour as well as the attitudes towards energy conservation. The paper presents the approach, the requirements, the infrastructure and applications, as well as the evaluation results of the conducted informative study, comparative study, user evaluation, and design study.