In the building domain, components or equipment are often subjected to severe
environmental conditions. In order to predict the reliability and the life-time of such
equipment, accelerated life testing can be carried out. Severe conditions are applied to
accelerate the ageing of the components and the reliability at nominal conditions is then
deduced considering that these nominal conditions are not constant but stochastic. In this
paper, the accelerated life testing of photovoltaic modules is carried out at severe
module temperature levels. The module power losses are monitored and the limit state is
determined when a threshold power is reached. The stochastic data and the reliability are
simulated during a period of twenty years. Finally, the life time of the component is
evaluated.