I presume they point the dish at the sun, so the shadow is in a fixed position. However the video shows during installation so not pointing at sun - but shadows that you see don't appear significant
Thanks - I didn't realise shade losses could be so significant. I did find panels designed to avoid shade losses due to a single cell in a string being shaded but such panels appear to be uncommon or expensive.
What really bothers me most about this problem is that it makes you have to choose between solar panels and trees, and that’s a shitty bargain. Trees are good, and they lower your AC bill.
Yeah when I read the title I thought they were covering the old dish with mirrors and putting a collector at the focal point. This is much less interesting :(