Your Sole' antenna looks the same as the one on my '2012 Airstream Avenue, so they've been making them a long time.
Mine sits as close to the ac as yours and I can say we don't get very good reception, but, it may be just the antenna and not the ac. However, I've tried several indoor antennas including one that attached to the rear lounge window with suction cups that works pretty well in our house and none worked as good in the van as the Sole'.
Probably just too much metal nearby (although I have a fiberglass roof cap) and the fact that omni-directional antennas aren't really omni-directional.
I don't want a to add anything bulky to my roof and really don't want to crank an antenna around looking for signals since we just don't watch much tv on the road. But I'll be following your thread in case someone comes up with a better solution.