Can PVSYST be used for simulating and analyzing mountain photovoltaic systems (with bifacial modules)?

[jianke1985]

Recently, we encountered a mountain-based PV project using bifacial modules with layouts involving multiple tilt angles and various azimuth orientations. When attempting to simulate this system in PVSYST, persistent errors occur. Could you clarify whether PVSYST currently supports simulating bifacial PV systems on complex terrain, particularly regarding the modeling of rear-side gain? If not, are there alternative solutions available? Thank you.

[Linda Thoren]

The bifacial model presently available in PVsyst is based on a simplified 2-dimensional representation, with similar assumptions as the "unlimited sheds" or “unlimited Trackers” PVsyst simplified calculation. This approximate calculation may be extended to a 3D scene, provided that this 3D scene is sufficiently well represented by the "Unlimited sheds or trackers". You can read more about the bifacial model conditions in the following help page:
https://www.pvsyst.com/help/project-design/bifacial-systems/2d-bifacial-model-conditions.html

With multiple orientations and sub-systems with different table width, you can in version 8 create new "orientations" in the orientations window and group all the tables with similar characteristics in a sub-system/orientation, and apply the bifacial model to each sub-system in the system window