The nation of France is one of the largest produces of electricity.

555.7 TW/h to be precise.

With about 64 million people France produces 555.7 TW/h while the UK with 60 million people produces 335 TW/h.

The reason for the large number in France is that the bulk of electricity in France is produced by nuclear, which is constantly running. So France is able to meet all its in country needs and export excess capacity to its European neighbours.