No batteries needed with a worldwide grid.

Further, wind should not be bundled with solar.

With wind, we are still playing the energy Ponzi, still taking Energy from Earth, rather than direct from the extraterrestrial source that is the sun.

Logically, Proof of work tokens generated from solar add to the energy of Earth, whilst the same generated from wind subtract from it, in the same way as all profit driven business to date.

In other words, wind power generation continues the grand energy Ponzi, whilst solar power ends it.