One of the priority goals of the European Union is the transition to a carbon-free energy sector, including energy use in buildings. New technologies enable use of renewable energy with elements integrated in energy self-sufficient buildings. In this paper, we investigated the energy properties of two modern glazing technologies, which are prevalent in modern trends in non-residential building construction: 6-layer glazing and a ventilated double-skin facade. Both systems have been upgraded with elements for improving energy self-sufficiency of buildings: with integrated electricity generators (BIPV) and phase change materials (PCM). The dynamic thermal response of systems was modelled with computational fluid dynamics in a reference summer day in environments with different climates. The results of the numerical simulations were validated by experimental measurements on a ventilated double-skin facade model with BIPV and PCM elements. Upgraded façade systems have shown great potential to reduce heat gains during summer. Parametric analysis of the material properties of PCM elements provides guidance in the selection of PCMs depending on the conditions of heat transfer. We have developed an approximation model for the prediction of the electrical power of BIPV elements, which enable the analysis of energy self-sufficiency of buildings.