It’s not a very long article, so they don’t get too into detail. This would use bifacial solar panels. On a purely optics standpoint, you’d think they are much worse than traditional (i.e., facing south at the right angle) panels, but they gain efficiency by staying cooler, and they generate more power when traditional solar isn’t, which helps smooth out the power generation curve. They also self clean and don’t have as much hail risk.