Yes, we need to stop thinking “battery” and broaden to energy storage as a whole, which can take many more forms (wind up a big coil! Push things uphill!).

You could actually put some thought into what you devote the energy to, and if wanting to do a blockchain based system, run Stellar or Ethereum nodes. Though they don’t use Proof of Work, so it would not use that much energy, relatively. You could offer supercomputing as a service that run batch jobs during the peak hours though.

I mean, “economy” fundamentally is the allocation of limited resources, if something is limited at a point when it’s needed, then economical doesn’t sound like the wrong word to use? (I’m aware economical means cheap, BTW)

A thing you can use which gets forgotten often in the conversation is “natural” / physical batteries, or better put stores of latent energy. Essentially, “push heavy thing up hill, make it come down later”.

I know little about it, but you can release the kinetic energy stored in heavy objects at higher altitudes basically whenever, using say a dynamo on the wheels of a wagon of heavy rocks you previously pushed uphill.

Isn’t one the issues with hydrogen motors that they are a bit explodey? Genuine question, haven’t looked into it in a long time.

But remember kids, he’s some sort of business and tech genius!