As always, we here in southern Spain were the last ones to get electricity restored, late in the night.
Went for a walk this evening, great atmosphere in the street, lots of people walking around and stores packed, everything was open except farmacies. And people talking each other instead looking to their cellphones, it felt great.
About the causes it was strange the shutdown happened at 12:30, when energy production is at max, 55% of the energy production at that moment was photovoltaic and about 82% renewable, that hour is the peak for energy production, wind was particularly strong too. Maybe the system was not prepared for such excess?
Which wouldn't make much sense since such phenomenon happens everyday at 12:30, maybe yesterday it was specially intense but still...
Another possibility is a outage in France which apparently happened just in the previous moments which fired some chain reaction or something. But I am sure such things have happened before too, so dont make much sense either.
Another possibility is a cyber attack, this theory makes more sense, it would be basically an act of war.
Finally last theory is somebody pushed the wrong button or something. Which means I have not idea how the whole thing works. Maybe somebody with more expertise in the matter could give some insight.