Alternator/generator/regulator problems of the 2015 Nissan Juke

My car died while rolling through an intersection, on a major highway in san angelo texas on December 12th, as I was about to make a left turn. The power down started with the xm stereo, then lights, then the engine died. Steering did not lock up because I was able to steer to the side of the intersection and turn the steering wheel. I turned on hazard lights and attempted to try to start the car. The car and the dash did not act like they would when the car had a dead battery. Lights would not come on when I pressed the start button. My door locks would not work, windows would not work, sun roof would not work. After several attempts and about five minutes wait time, the car started. The first mechanic looked the car over and could not find anything wrong. He checked my key battery, also. All connections were good, battery was good under the hood and in the key fob. He sent me to the Nissan dealership in san angelo, texas for a more detailed inspection. The mechanic at the dealership found no faulty connections, battery, alternator, etc. They gave me no answers as to why this happened.