It looks like our electrician ran out of wire nuts . Single receptacle means a dedicated circuit.
I just have question. Does any of this equipment work?? I would bet they used the wrong size overload protection.
I would hate to service this unit in the winter. A couple pieces of strut could have fixed this problem.
Seems to me the electrician did not know the grade line. I always used a 90 degree bend. Can never go wrong.
True if the ground rods are supplementary . If not I hope this was done by a homeowner !!!!!