[beAbU]

The benefit of vertical is that it produces a duck-curve. The normal cosine curve with a peak at noon is basically the inverse of grid-scale demand, which necessitates grid-scale storage.

So vertical makes a lot of sense on large scale solar farms I think, even more so when you consider the land can be better utilised.

On domestic scale, where you can easier shift your load to match your production AND you might already have a roof with the right front and pitch, normal pitched north/south facing installations might make more sense.