Testing process for flexible PV

Objectives and work programme

Semi-flexible, thin-film photovoltaic modules without glass have great potential for solar power generation in buildings. The malleable elements can be integrated into multi-functional roof and facade products, for example in solar roof sheeting, and can be added to the building envelope in a harmonious way. Thanks to their low weight and flush installation, they are also suitable for buildings without a static reserve load capacity. Compared with rigid modules made using glass, they also have different needs in terms of storage and transportation, as well as in an installed state.

However, the national and international standards for construction certification of PV modules, IEC and DIN EN 61646 and 61730 in particular, are designed primarily for mechanically attached standard PV modules with glass coverings and therefore do not consider the special properties of the lightweight modules, which usually have full-surface adhesive bonding. As such, an interdisciplinary expert committee comprising representatives from BIPV manufacturers, manufacturers of related technologies, adhesive manufacturers, research institutions and testing laboratories is to identify the limits and gaps in the existing standard. The Institute of Building Construction investigates relevant testing scenarios from the field of construction and other sectors, with a focus on evaluating adhesive bonds, in order to develop enhanced testing processes and ageing tests for flexible PV elements. In the long term, this is intended to bring effective and practicable tests into the PV standard, which is also intended to serve as reliable and recognised evidence of quality for manufacturers.