Hydrogen has its place, and we need plenty of it in places where we don’t have viable alternatives. Road transport is pretty far down that list though.

The Clean Hydrogen Ladder

And don’t forget that the plants are really expensive. Having them produce very little or even no power for half the time doesn’t help that at all.

Thermal storage needs to be quite large though, at least with the stone/brick like mass they used back then. And you need to isolate it, otherwise you have no control over the release of that stored heat. I wonder if new materials, maybe something that undergoes phase change in that temperature range, could be a lot more space efficient.

At least it doesn’t look like chocolate stuff, always great to get those turning white because they baked in mid summer heat.

Looks like a perfect space for every lazy person to push their shopping cart into.