Yes Farmerdill, I have been told that this Satsuma could overwinter in ground in zone 8a.
A friend has had one in ground for many years. When it was newly planted, he provided protection in winter but now that it is established and large he does not cover it.
I haven't talked to him since we just had over 40 hours below freezing with temperatures down to 14 degrees. I can't help but think the fruit would freeze solid with those temps.
I chose to keep mine in a container because it is easier for me to fertilize and control moisture.
