“Doesn’t solve the problem of supply and don’t forget all the copper needed to expand the grid, there isn’t enough.”
Despite an ever-increasing demand for copper, there is more of the metal available today than at any other time in history. This, together with the ability to infinitely recycle copper, means that society is extremely unlikely to deplete the copper supply, and copper will continue to contribute to global initiatives, like the SDGs and clean energy.
https://copperalliance.org/sustainable-copper/about-copper/cu-demand-long-term-availability/
Let me give you an example. For England to covert to total EV use by 2030, expanding the grid, etc., it is estimated they would need the entire worlds output for a year.
So for California you might be talking several years. There isn’t enough for that demand.
That’s fine for copper, but what about the others? Can they be feasibly recycled yet?
Clean energy, as it’s euphemistically called, is fine for supplemental power, but otherwise, it can go stick a sock in itself.