The space industry aims to promote economic growth, while ensuring a sustainable use of space. The sustainability objectives of space often refer to Active Debris Removal missions, which, despite being needed, are still following a linear economic model. Space circular economy permits giving value to space debris, considering it as a valuable resource. Pilot studies investigated the application of circular concepts to spacecraft solar panels. The results of a first study on the thermal degradation behavior of the solar cell encapsulant, WACKER® RTV-S 691, identified a degradation starting at 300 °C. It demonstrates great potential for further investigation of thermal delamination processes. This paper aims to propose an experimental approach to investigate the use of solar radiation to delaminate and to anneal spacecraft solar cells using a Sun simulator with a maximum power of 1500 Wm^-2. This initial study aims to start the discussion of the implementation of circular concepts within in-space assembly and manufacturing to facilitate their implementation.