Right, owners of the "S" model can charge free for life. No word on what owners of subsequent models will pay for it. I'm eager to see whether they can trim that 30 minutes down to, say, a max of 15. 30 minutes every three hours is too long, but 15 would work. Get out, plug in, go take a bio break, come back, wash your windows, and you're just about ready to hit the road again.
These are exciting times to live in.