The European Union (EU) is increasingly targeting energy poverty in its policy action, aiming to boost efforts towards the effective reduction of this issue within a framework of energy efficiency, decarbonisation of the economy, and a clean and just energy transition. The latest effort is “Fit for 55”, aiming to update EU legislation to achieve its climate goals [1]. In the “Clean Energy for All Europeans” legislative package, the EU mandates Member States to address energy poverty in their National Energy and Climate Plans (NECP) and propose measures to mitigate it, if necessary, in each context [2]. The Green Deal also stresses the need to integrate the goal of mitigating energy poverty in wider efforts for a sustainable energy transition [3]. Following this indication, several Member States have developed national strategies to tackle energy poverty, advancing their own definition, methods for measurement and monitoring, and solutions to tackle it in terms of a national point of view. The adequate measuring and monitoring of energy poverty enables a more comprehensive understanding of the breadth and depth of the problem, which is an essential step towards the production of effective evidence-based policy strategies and schemes, as well as the impact assessment of these instruments towards a swifter resolution of the problem [4,5].