Dears, to my experience as well, this is not possible yet, which is a pity.
What I am doing in the moment to get my monofacial reference (e.g. to assess the potential bifacial gain of a system) is to repeat my bifacial simulation with "don't use in the simulation" (System / Bifacial System / General Simulation Parameters).
Can someone confirm that this is the way to go?
That will give you the bifacial gain for the bifacial module
, but not give you the gain if you were to install a monofacial module instead. Bifacial modules have different performance and sizing compared to their monofacial equivalent from the same manufacturer (from what I've seen).