[pfdietz]

Also, if the modules are put in at high angle, up to vertical, they work better in winter when the Sun is low in the sky, and snow does not accumulate. In the summer one can even grow things between them. If the modules are bifacial, light scattered off the snow or sky behind them can be captured on the back surface.

[vizzier]

https://www.youtube.com/watch?v=5AVO1IyfA9M Video linked earlier in the thread that gives a visual on what exactly this looks like.