Dear forum, I would like to extract the total rear irradiation estimated by PVsyst in hourly resolution to compare it with measurements we have. In the list of variables that I can export I only find "Beam on rear side", "diffuse on rear side", "total on ground", etc. but not total on rear side. Have I overlooked something? Is there a simple way to reproduce this value (e.g. as the sum of others)? Thank you very much for a reply. Thore Müller