European roadmap for the En-ActivETICS advancement and potential of the PV/PCM unventilated wall system application

•The new solution for the façade integrated photovoltaic system, En-ActivETICS was proposed and described in detail, including technical recommendations.•The calibrated numerical model was used to determine hygrothermal performance and identify the most crucial issues of En-ActivETICS.•The positive effect of PCM and diffusion channels was revealed based on a numerical study using calibrated thermoelectrical and hygrothermal models.•The En-ActivETICS was investigated considering local climatic and economic conditions among 38 European countries.•The roadmap 2030 for the En-ActivETICS advancement was developed and presented.