Reuters reports that at least 20 high-voltage cables would need to be strung under the ocean, at $1 billion a pop.
Bradford Plumer at The New Republic comments, "Then consider that Morocco and Algeria, two prime sites for the CSP plants, would have to coordinate their efforts for the project to work-a tough nut to crack given that the border between the two nations is currently shut, due to a dispute over Western Sahara. There's also the lesser risk of "Al Qaeda-aligned rebels" in Algeria."