Energy System Models (ESMs) are tools that help energy experts and policy makers to rationally describe energy systems and systematically evaluate the impacts of long-term energy scenarios. Current ESMs lack accuracy required for proper capture of the use of energy in households. WHY develops a new Causal Model combined with an innovative profiling approach to analyse human decision making in energy consumption and human reactions to energy policy changes. WHY will therefore create innovative methodologies for short and long term load forecasting. The WHY toolkit will be used to assess several scenarios simulating different policy measures. All results will be open-sourced to maxim- ize uptake, and be widely disseminated to diverse target audiences
