What's the current state of bifacial modules?

What's the current state of bifacial modules?

I'm looking into some ground mount designs for home solar, and one thing that's come up recently that I don't know that much about are bifacial modules.

They seem to now be a thing that's in limited general availability, though solar installers talk them up a bit in my experience.

A few specific questions:

  • Will they produce identical power from the opposite sides, given identical illumination, or is there a very definite "front side" and "back side"?
  • Has anyone experimented with a north-south facing "fin" of panels? It seems this would optimize power production far closer to actual use patterns, if one didn't have shading issues (which I wouldn't).
  • Who actually sells them? I can find only a few vendors online.
  • How are they rated? Are they rated under STC test conditions of illumination from a single side, such that they would often be producing far more than rated power?

Thanks!

submitted by /u/Syonyk
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