Charging batteries with solar and wind is much more efficient than producing hydrogen. Why would you not charge batteries during peaks?

Because batteries are laughably costly for long term energy storage. It’s not even close; batteries will never be used for anything but short term storage.

Untrue - long-term energy storage options are being targeted by deep pocketed capital. E.g. Form Energy and Vanadium technologies.

LiON batteries can't do seasonal though - short term only.

Hydrogen is a good choice for storing peak power from renewables.

Distributing all that highly flammable high pressure blow-up juice around the world for consumer use is another matter.

Its a fantasy to believe that anybody would install such and absurd amount of access wind and solar that it could both cover the low production times and enough to export for use in vehicles.

That simply not economical.

In fact several technologies are more likely to be used then hydrogen for grid storage.

> Its a fantasy to believe that anybody would install such and absurd amount of access wind and solar

Fantasy becomes reality:

https://www.bbc.com/future/article/20190327-the-tiny-islands...

https://www.bbc.com/news/uk-scotland-highlands-islands-56279...

This would indeed be ambitious, however when considering that it is possible (the primary sources potential is adequate), that it will solve problems related to fuel reserves, and also a fair part of challenges related to NIMBY, overcentralization, capital intensity, pollution, waste disposal, decommission... it may (overall) be our best approach.

I was writing about a less ambitious plan, which simply aims at storing the energy produced by solar/wind powerplants during peak production periods.