At this point, let us remark on some of the facts characteristic of the last decade concerning PV electricity. First, we observe that we have just reached the 100-GW mark, a value that no one could have predicted a decade earlier. Second, the installation of PV systems, which in the past was mainly concentrated in Europe, is at present markedly being extended to non-European countries: China, the United States, the Middle East, North Africa, etc. Therefore, the IEA BLUE scenario of moving to the terawatt scale in the next three to four decades seems very plausible. It even looks more realistic if one takes into account the predicted lowering of the PV levelized cost of energy for the 2012 to 2050 period,1,6 which will allow many regions of the world, with good solar resources, to reach grid parity within the next one or two decades. Evidently, in special locations like the Canary Islands, Hawaii, etc., where a high proportion of the electrical energy has to be imported, the grid parity could be attained even sooner.