Re: Power required
Economy 7 is only of use for people who use a lot of power at night. Not many people do that's why there isn't much take up.
With EVs, those users do use energy at night and so there is a good incentive to do it. Hence you get tariffs that allow periods of very cheap electricity (similar but not E7).
As for "when IT stuff goes down" that applies to absolutely everything. Banking, fuel stations, traffic lights etc. You just mitigate around it. The costs and availability of electricity generation is fairly predictable. From the basic - cheaper at night, medium in mid day, high in evening. They can always fall back to that if they can't get real-time pricing. There are far more variable things in life that are taken into account each day.
Biting the hand that feeds IT
