Correct. If the writer had only watched the NASA broadcast he would have heard it right from the horse's mouth. Because of the low temps at night, the power req

Correct. If the writer had only watched the NASA broadcast he would have heard it right from the horse's mouth. Because of the low temps at night, the power requirements to heat up the rover and devices would not make it worthwhile. In addition, the total output of the generator and batteries on a particular day is not enough for it to run continuously for the entire day. Another interesting point brought up was that the rover was tested to 3x life but not to failure. It's certainly possible for it to run for many years longer than the stated life.