The BIGGEST problem with clean energy

The rich will buy whatever is the equivalent of Tesla Powerwalls and hoard their own solar power.  Think of it as the energy equivalent of the New Orleans cisterns that would collect rainwater.  And then they will let the electrical grid deteriorate to Third World levels for everyone else.  Just look at various Third World megacities with unreliable electrical grids where the rich right now can fend for themselves with their own generators.