This has already been happening for a while with cheap hydro electricity from Siberia, if I understand the situation correctly. Did anyone perform a comparison of Bitcoin vs batteries vs new electricity lines yet, is it a viable replacement under certain conditions?
What would the batteries do?
1. Build turbines
2. Stick Bitcoin miners in them (or the off-shore substation?)
3. Disconnect Bitcoin miners when export cable is complete
4. Repeat
5. Save the world