Offshore wind and onshore solar excess can be used to produce hydrogen, not coal.
It takes extra steps and introduces inefficiencies, but it is able to store larger amounts of energy than batteries, and can be used in certain industrial processes which do not run on wires and electrons.
In a succesfully electrified world, it is likely that some ammonia and hydrogen is shipped around the world for such use cases. The main alternative is to keep using fossils.
Hydrogen is coal with extra steps. It takes a lot of energy to make hydrogen
Offshore wind and onshore solar excess can be used to produce hydrogen, not coal.
It takes extra steps and introduces inefficiencies, but it is able to store larger amounts of energy than batteries, and can be used in certain industrial processes which do not run on wires and electrons.
In a succesfully electrified world, it is likely that some ammonia and hydrogen is shipped around the world for such use cases. The main alternative is to keep using fossils.