In 6.78 I encountered a bug in the PVsyst Report when simulating a system with mixed orientationes (e.g east/west). After a little testing, the bug seems to appear only when there are multiple inverters. The losses for - PV loss due to temperature - Module quality loss - LID - Mismatch - Ohmic wiring (DC) are all divided by 2 in the loss diagram, so e.g. Ohmic wiring -0,2%, instead of -0,4%. Another example: LID loss on page 1 (PV array loss factors): -1.0% But LID loss in the loss diagram: -0.5% The resulting energy in MWh however seems to be still correct, so I assume only the displayed numbers for these losses are bugged.