The Swiss test centre ISAAC-TISO, built on the work done in the 1980s such as the realisation of the first c-Si module connected to the European grid and the realisation of one of the first silicon amorphous modules in 1988, was created in 1991. The main objective of the test centre is the evaluation of module quality, meaning the assessment of the power values declared by the manufacturer, the electrical behaviour and energy production in different climatic conditions, the stability of these values through time, and module life span. Previously, both an outdoor and an indoor structure for testing the electrical behaviour of modules were created.
