How Spain powered back to life from unprecedented national blackout

However diversified Spain's energy mix is, the blackout required an enormous effort to get back up and running.

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It was not until 11:15 (09:15 GMT) on Tuesday, almost 23 hours after the system collapsed that Spain's electricity grid declared it was back to normal.

The trains have started running again although some lines are suspended and most homes have got their power back.

So how did it get back up and running and why did it take so long?

For most of Monday, Spain was in chaos.