Only at lower latitudes. In the high north, the better config is vertical but one-sided in a V pointing south. Ideally then, one panel is face-on during the long sunrise, the other during the long sunset. Compare to at the equator where one side of a two-sided panel is facing the sunset/rise.

This opens the interesting prospect of hinged vertical pannels that could be adjusted for the season, opening up the V in winter and closing it in summer