I forget the name of the company, but some guy is working on electric cars with swappable batteries: the idea is that instead of plugging your car in overnight

I forget the name of the company, but some guy is working on electric cars with swappable batteries: the idea is that instead of plugging your car in overnight to “refuel” it, you would take it to a service station and change the discharged batteries for charged ones. Now imagine that the outlets for charging those batteries were connected to a wind-powered grid, where the power company charged a lower rate in exchange for less reliable availability. That kind of service would suck for running, say, an Internet data center, but it would be adequate to make sure that all the batteries that came in by 6:00 pm were fully charged by 6:00 am. Voilà! Two problems solving each other.