The energy transition raises many questions about how to achieve and design net-zero emission energy systems. Energy models can support decision-makers by providing virtual laboratories in which different energy futures can be explored. But what are the requirements of different stakeholders on these energy models? Which challenges of the energy transition should they tackle? What questions should these models be able to answer? In order to identify needs and discuss the expectations placed on energy modelling in the framework of the project Sustainable Energy Transition Laboratory (SENTINEL), we conducted an online survey in summer and held an online expert workshop on the 1st of October.