When the sun angle is low, both arrays are producing the same amount. That's why I lined up the shadows so that they would block out an entire cell row at the same time. Look at where the sun is rising at my latitude and season. The shadow falls on the panels at the exact same moment. I couldnt do test during other seasons

Study mentioned in the video: https://www.mdpi.com/1996-1073/15/1/22

Check out my older bifacial test videos! I have tons. This video gives a quick summary of what you really need to know.