[wongarsu]

I imagine installation costs are also substantially lower since the panels rest on a much simpler structure. Cleaning the panels should also be easier in this configuration. I wouldn't be surprised if these findings lead to vertical solar systems becoming a popular option, especially in places as far from the equator as Denmark.

[pfdietz]

The output can also be timed for better value (for example, increasing production in winter vs. summer, or peaking early and late for N/S aligned modules.)

Combinations of different orientations can smooth output over a day or year, which could reduce the mismatch between module output and inverter capacity.