Doug101:
I had a California Certified Solar Design Engineer tell me that during the day the solar panels on my roof get charged-up during the day and then at night discharge and supply electricity to my home. The guy then was trying to sell me four PowerWall battery banks. I asked him why I needed the batteries if all of the energy is stored in the solar panels? He said you know your right. You don't need the batteries; all of the electricity is stored in the solar panels.
So, basically you're saying that ---- the particular solar 'design engineer' wasn't an electronic engineer (or someone that understands basic electronics), and doesn't know the basic functionality of solar panels etc.