Bifacial Simulation with reflectors

[Janani]

Hi..

I am trying to simulate a bifacial system on a rooftop top surface. Pl let me know, the albedo which we are entring shall be applied to ground surface or the rooftop surface?

Thank You.

[André Mermoud]

The albedo involved in the bi-facial calculation is the albedo of the ground surface "seen" by the collectors, just below the installation of course.