Interesting site and the following from that site has implications for these remote wind and solar farms too.
"Partly due to history, and partly due to physics, the US electrical transmission grid is actually rather localized. The electrical energy we use is generated pretty near where we use it (also, pretty much just before we use it). This is a big problem if you propose to harvest energy in one place where it is abundant (for instance, via concentrated solar in Arizona, or via wind turbines in North Dakota) for use someplace else far away.
The historical portion of this surprising fact, I think, has to do with how the electric power industry evolved in the early 1900’s - generally as municipal utilities, many publicly owned. The physics contribution has to do mainly with transmission losses.
Now it’s not hard to dredge up the figure that transmission losses account for about 10% of the electrical energy generated in the US - that is, out of every 10W of power generated, we lose 1W getting that power to where it’s put to use. Because we use a lot of power, this represents a huge waste, but measured as a calculation of efficiency it’s pretty good - that’s 90%."