This work focuses on the combination of solar panels installed on wing profiles and thermo electrical generator modules. The concept of these two systems working together has the scope to increase the electrical output of the solar cells. A model of the panel-module system is proposed, based on the energy balance of each component of the system, including radiation, conduction and convection phenomena. Data of solar panels and thermal electric generators are taken from existing products available in the market and their values are averaged and derived by trendlines to adapt the available data to the temperature range that are relevant for aeronautical applications.