We have had some discussion related to the dissipation of heat from the Aptera in the past. One source of heat will come from the air conditioning condensers especially in the summer. Until I see the efficiency of the in body composite cooling, I still think we should have secondary ways to cool the car interior as well as heat from the motors/brakes when under heavy use. At this point, it is all theoretical and I haven't seen it used in anything else. Think going up a grade at 70 mph in ambient temperature of 95 degrees. I noticed that the Mustang GT has louvers that can maintain an aerodynamic body shape until extra cooling is required.
I still think an ideal location of a vertical oriented evaporator would be the front of the rear wheel enclosure where the air is normally stirred up by a rotating wheel/tire assembly. Alternatively, if the company wanted to keep an in-body design with a ducted air flow to a metal radiator or condenser at the underside of the body on either side of the third wheel assembly. Metal of either copper or aluminum has one of the best heat transfer characteristics and would be much better than that of composite. Minimal aerodynamic disturbance if NACA ducts are used. Air is ducted into an air flow, through an in-board radiator/condensor and out the rear flat panel adjacent to the license plate. We use these on both cars and planes anytime air needs to be ducted with a minimal surface air disturbance. Anyone who works with turbocharger intercoolers knows how hot air-conditioning evaporators get and knows to keep the intercooler in front of those structures. Just food for thought. We are all guessing until we see what production comes out with and the data associated with heat efficiency.