This system I have in mind, how would you like something that can never crash, is immune to weather, it goes 3 or 4 times faster than the bullet train," said Musk last July. "It goes an average speed of twice what an aircraft would do. You would go from downtown LA to downtown San Francisco in under 30 minutes. It would cost you much less than an air ticket than any other mode of transport. I think we could actually make it self-powering if you put solar panels on it, you generate more power than you would consume in the system. There's a way to store the power so it would run 24/7 without using batteries. Yes, this is possible, absolutely.
https://www.usatoday.com/story/tech/columnist/baig/2013/05/30/elon-musk/2372243/
I'm getting the impression Elon Musk believes in that old Nikola Tesla supernatural technology information conspiracy stuff.