The French? You're joking, right? Your nuclear plants are most of the time turned off because they aren't working properly which destabilizes the entire European grid because you need to import so much electricity from your neighbours.
The only reason why your electricity is still so cheap is because your nuclear plants are so heavily subsidised by the state and the exploding energy prices in the recent past have also been capped by the state fearing the right wing uprise. (Happening nevertheless) An action which ripped deep holes in the government's funding which is the cause why economists are nowadays more afraid of France's instable economy and government debt than even Greece's.
So yeah, your electricity is cheap because you basically f*cked yourself