If a buyer opts for the Full Solar option, it appears that the rear window is going to be almost totally covered with solar panels.
Would it not make sense to remove the Glass, assuming that is what will be there. Replace it with composite and lose the weight of the glass window. That would also make it more difficult for people to see items in the storage area. If you really dont want them to see, there could be a pull down to block seeing from the other windows.
You may even be able to slide in some extra panels and up the daily gain in charging.
I think there is a rear view camera already.
I did see that they are already looking at replacing glass with composite, but in this situation, it is just body color. No extra cost for transparent composite.