Ambient persuasive displays could be a potential way to raise awareness and lower the energy consumption in private households. There already exist a range of products in this direction. However, none of them seem to have any longterm persuasive effects. We argue that this effect could only be enabled by involving providers and potential users in the design process of an ambient persuasive display, which aims to lower energy consumption. In this paper, we present the results of five expert interviews with energy consultants and a participatory design workshop with six potential consumers. We focused on the ideal persuasive strategies as the requirement. In here, we show the commonalities and differences between these two stakeholders, demonstrating the relevance of taking both sides into account in the design to support behavior change systems.