The energy transition requires actors across all parts of society to make the changes necessary to reach net zero targets. In order to ensure public buy in, it is important that policies are perceived as fair by the people affected by them. While the notion of justice or fairness is prevalent in discussions on the energy transition, research on energy justice mostly investigate fairness through analysing policy documents or engaging with relevant stakeholders. Less focus is given to what individuals themselves experience as fair, and importantly, why they do so. In this study, we explore how the public weight different aspects of fairness in the context of the energy transition. Drawing on theoretical and empirical literature, we measure a comprehensive list of fairness principles relevant for energy policy. We also test whether people differ in how they construe fairness depending on individual and context level characteristics. For instance, the role of personal values, system justification beliefs, knowledge and awareness. In doing so we aim to get a more complete understanding of not simply whether people differ in what they deem fair policy, but whether they differ in the processes by which they reach these judgements. Results from this research can help achieve a more nuanced understanding of how people reach fairness judgements, and it can aid practitioners in formulating policies that better respond to these disparate views. Further, by understanding the sources of differences in fairness preferences, it allows for designing interventions to bridge these gaps. It can also serve as a starting point for dialogue about how to design systems for creating fair policies considering these differences. Data collection is currently ongoing, with an expected sample size of 500 Dutch participants.