An Industry Foundation Classes (IFC) Schema Extension for Building Information Modelling (BIM)-Based Description of Building Integrated PV

Integrating Building-integrated Photovoltaics (BIPV) in nearly zero-energy buildings (nZEB) has gained importance due to its dual role as a renewable energy generator and building material. However, adoption is hindered by the lack of digital product data representation in Building Information Modelling (BIM). This study aims to establish a structured approach for representing BIPV products within the Industry Foundation Classes (IFC) schema to facilitate efficient information exchange. A systematic comparison of existing BIPV representation methods in BIM was conducted. The study then developed new BIPV property sets and classification options within the IFC schema. A validation process assessed the feasibility of the proposed classification and properties. The study identified key gaps in the digital representation of BIPV within the current IFC 4.3 schema and proposed a refined classification framework. The newly defined property sets and categorisation enhance interoperability, ensuring accurate data exchange across BIM platforms. The findings support the seamless integration of BIPV in digital building workflows. This research advances the digitalisation of BIPV products by addressing gaps in BIM compatibility. The proposed BIDM framework provides a structured method for representing BIPV in IFC, contributing to standardisation efforts and promoting wider adoption of BIPV in the construction sector.