I can't wait for more molten car incidents when it becomes even easier for curved designer buildings to focus massive amounts of light at random points on the ground.
This is diffuse reflection (rough), not specular like a mirror.
Diffuse reflections still scare roughly with cos of incidence angle, so diffuse-only panels arranged into parabolic or spherical shell would still focus light, even if much less efficiently.
Already lots of groups doing solar panel cleanings. I imagine the venn diagram between people who invest in solar and in these roofs may have some overlap.
That already exists though, I just paid a guy in a truck a bundle of money to clean my roof. Maybe this is mostly a thing in the PNW though?
Building exteriors are regularly cleaned all over the world. It's over a billion dollar industry in the US alone.
It would probably be even larger if more US roofs were pristine white instead of dark asphalt.
Yeah, but these will be a different breed. I know a number of folks that power-wash buildings and roofs. It's a cottage industry, hereabouts.
Definitely a PNW thing. The rain here causes moss and other problems that aren't prevalent back east.