It's always sunny somewhere, but if that is on the opposite side of the earth during the night, good luck building grid transmission. It's always windy somewhe

It's always sunny somewhere, but if that is on the opposite side of the earth during the night, good luck building grid transmission. It's always windy somewhere, but that also might not be on the same continent as you need it. So if you don't like gas peakers or don't run a nuclear baseload you need to bridge those short non-windy winter days or weeks with batteries. Multiple nation scale terawatt-hour batteries. Which means millions of Tesla li-ion megapacks or millions of pumped hydro plants - which gets expensive and unfeasible real quick as you run out of either the battery raw materials for the former or suitable sites for the latter.