Even in the cases where it absolutely makes sense to distance/time shift some of the grid's output to hydrogen to ship it physically somewhere (such as a festiv

Even in the cases where it absolutely makes sense to distance/time shift some of the grid's output to hydrogen to ship it physically somewhere (such as a festival in the woods, perhaps, that today would rely on diesel generators for power), it's still going to be way more efficient to use a bank of larger than would fit in a car fuel cells in a shipping container creating a "mini-grid" of electricity that things like battery electric cars and other appliances could plug into than to have cars carry around fuel cells "just in case" of events like that.