The PV modules are integrated into different building components, providing examples of how the PV might be used in place of traditional building materials. The PV substitutes the semi-transparent parts, the insulated windows, the external parapets and the external cladding. In the semi-transparent part, it is used as a sun shielding without the need for additional shading provisions that would have increased the costs. Moreover, the amorphous silicon texture produces a special lighting scenario, a uniform shading effect that does not disturb the office’s users. The light controlling function of the photovoltaic cells is added to the insulating function of the glazing system, highlighting the multifunctional feature of the BIPV technology. Regarding the BIPV system design, one of the main challenges reported by the designer is related to the strict fire-safety regulations which need to be respected in the façadedesign (Energytech Srl).