I found something out today that I didn't previously know about solar panels....
If there is any portion of a solar panel shaded, then no energy is collected by that panel! How unbelievable is that? Apparently scientists are only currently looking at this issue, which is being done in collaboration with computer scientists who have worked on maintaining computer systems/servers, etc where one component can drop out and you don't loose full efficiency.
Additional government support and investment in renewables will lead to the resolution of such issues sooner rather than later!
In the meantime, ensure your residential solar panels are not in the shade!