In theory if the world was one contiguous landmass with uniform population distribution you would always pull solar energy from few longitudes away to fulfil yo

In theory if the world was one contiguous landmass with uniform population distribution you would always pull solar energy from few longitudes away to fulfil your peak demand of 6 - 10 pm from domestic perspective. At large enough scales even today, I believe there are enough markets where such long distance transmission adds a layer of redundancy that possibly energy storage cannot. Free market or International intervention, either routes point to only more interconnectedness of global grids than less.