Last Saturday (1-6-2018) I was in the local ALDI store in Los Angeles at about 2pm. They have +-30Kw of fixed solar panels on the roof. With a thin cloud layer at about 10,000 feet (sun visible through clouds) the LCD monitor screen showed the total instantaneous output to be 3kw. Not impressive at all! I hope the state of California gave them a real good tax incentive to install the system because that day it surely wasn't paying for itself. (the CA residents were) That said, I am a big fan of solar power.
Chum lee