This was a good day!
I went to Sam's Club with my parents to stock up. It will be crazy busy from now through the holidays so they won't go back until next year. My shelves are full. :)
Arriving home found the solar guy and electrician working hard on the system. They tracked down the solution with the manufacturer and after rewiring the connections and one pesky fuse... it works! Hooray! The electrician is all fired up now and can't wait to tackle another installation. The solar guy said he even had friends who wanted to try this but all refused to be the first. Luckily, I'm mad enough to be a guinea pig.