Application of Shaped Reflectors to Increase the Energy Harvest of Bifacial PV Systems - Analyzed with a Miniaturized Test Array

For bifacial module arrays three dimensional, reflective elements in between the rows might be an option in order to achieve a low light concentration resulting in a further increased energy harvest. A simulation of such conditions using the optical behavior of real reflecting foils is hardly possible; measurements at real systems would require considerable effort. In this work we present results obtained by a measuring setup with rotating mini modules. In particular the influence of the ground reflection was studied by using various grounds and reflecting elements with different shapes. Prior to the analysis of the reflector elements the measurement setup is described.