A lower administrative court had already cut the fine by two-thirds to 27 million euros in 2019.

The top administrative court "found that there was no abuse and therefore ordered the antitrust sanction to be annulled in its entirety", an Enel statement said.

Enel, which has always said it had operated in full respect of market rules, expressed satisfaction with the court's decision.

($1 = 0.9523 euros)

(Claudia Cristoferi, editing Gianluca Semeraro and Elaine Hardcastle)