Great, so now not only is power production nondeterministic, your cars tank also is. It was too expensive and the algorithm decided to wait charging, so no spontaneous road trip for you, sorry.

As an electric car owner, this is absolutely the biggest non-problem ever. If you're planning a long journey, you push one button at some point over the preceeding week and it charges to full regardless of price.

I mean, assuming you don't zero your charge out when returning home, you could just take a few minutes to use a rapid charger part way through the journey...