I'm currently installing some dual sided ones, but facing up and down instead of east and west.

Having a solar panel facing down, at a height of only a few inches, does sound crazy at first. But the cost premium for double sided panels is miniscule, and it's expected to add 10% to output, maybe 15% if you're lucky. First I'm covering the roof with a white TPO membrane to increase reflectance back to the underside of the panels.

This installation is on a flat garage roof, 18 panels at a 10 degree slope as a zig-zag in profile, total installation height about a foot. Like the vertical panels in that article, the 10 degree slope is not optimal for peak power production, but you do get higher output early and late. And it's invisible to others.

I've heard that basic panels are so cheap now that some farmers in France are using them to build fences. The power is just a side benefit. France is not known as a place where anything is cheap, but fancy two-sided 500-Wc panels are 89 euros per panel including the 20% sales tax, and cheaper by the box. That's without installation, but it's maybe half the cost per m2 for a painted wooden fence installed.

Jim