I once estimated that it need the surface area of spain to power all of the world. Asuming all energy is electricity at that point. And I only took bad numbers

I once estimated that it need the surface area of spain to power all of the world. Asuming all energy is electricity at that point. And I only took bad numbers like 100w sqm for 2-3 h a day. So very local photovoltaic and storage is more or less the solution in my opinion.