Comment by cryptonector

From the "wire-to-wire" mention it seems that they're proposing using electric power to generate and store hydrogen till it's needed, then burn it to get electric power back.

But they say other fuels work, in which case it wouldn't be "wire-to-wire", and then it'd be more appropriate to compare this to a power generator fueled by natural gas or gasoline. A generator with no pistons or turbines, just a fuel pump, sounds fantastic, if they can make it work. But you'd have to supply sodium.