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But as we refine and revise power delivery to our communities, why then do we want to emulate the substation model?

Tiny deployments of off-grid solar beat the pants off that model.

Sure, for individuals or pairs roaming about in an RV, small homesteaders, etc.

How many tiny off-grid solar deployments are required to power the people and industries of a small city of two million?

Many acres of grain are required to feed such a city, why not many fields of solar panels, community batteries (roughly one per 1-2 hundred houses), smart grids, etc.

Yeah, these are the real questions IMO.

I think we're gonna see more and more EVs double as off-grid power banks, for example.