Check the controller , if the moon is showing during the day, reverse the wires coming the panel on roof in the controller. I was concerned about doing that, putting a white ground in a "hot" port, however at the direction of Thor Customer service, I did just that and now it's working 100% with a Sun on the display during sunlight hours and moon at night. Could be wired backwards in China I guess because when I went to the roof, it appears Thor wired it correctly up to the panel.
__________________
|