By Brazil Stock Guide – Brazil’s electricity regulator rejected Enel São Paulo’s final arguments in a proceeding that could terminate its power-distribution concession in the country’s largest metropolitan area.
Technical staff at the National Electric Energy Agency, known as Aneel, said Enel SpA’s (ENEL IM) Brazilian unit failed to demonstrate the structural capacity needed to respond adequately to extreme weather. The conclusion maintains an earlier recommendation to revoke the concession despite operational improvements reported by the company in recent months.
“The concessionaire did not demonstrate sufficient structural capacity to respond adequately to severe weather events,” Aneel’s Technical Inspection Superintendency said in a memorandum dated July 31.
The document will support the regulator’s board as it considers the next stage of the administrative proceeding. The technical opinion doesn’t end the case or immediately cancel Enel’s contract, with a final decision on the concession still pending.
Aneel formally opened the proceeding on April 13. Enel submitted an initial written challenge on May 13, contesting both the investigation and the regulatory findings, before filing its closing arguments in July.
The agency’s technical team concluded that the latest submission failed to overturn evidence gathered during previous inspections.
“The inspection’s conclusions remain valid that significant failures persist in the continuity and efficiency of the service provided, and the arguments in the independent opinion are not sufficient to overturn that understanding,” the memorandum said.
December Storm at Center of Dispute
The investigation centers on Enel’s response to a severe storm on Dec. 10, 2025. Regulators determined that the measures deployed by the utility were insufficient to ensure an adequate restoration of electricity service.
Enel disputed the methodology Aneel used to assess the recovery. The company said it restored service to 80.2% of affected customers within 24 hours, compared with the regulator’s calculation of 67%.
The utility argued that Aneel relied on a “simultaneous peak” approach based on the highest number of customers without electricity at any single point. Enel said that method didn’t accurately reflect the number of connections restored throughout the period.
Regulators rejected the allegation of a calculation error, saying the two percentages resulted from different methodologies. Even under Enel’s preferred approach, its performance would still fall short of that recorded by other utilities facing comparable weather events, according to the technical team.
The methodological dispute therefore didn’t change the agency’s broader conclusion that Enel’s operational response remained inadequate.
Independent Review Request Denied
Aneel staff also rejected Enel’s request for an independent technical assessment. The company had sought a fresh review by specialists selected jointly with the regulator to reassess the inspection criteria and conclusions.
The agency said its examinations had already been conducted by specialized public servants and that another analysis wasn’t needed to clarify the facts.
“The requested evidence is merely revisional or countervailing in nature and is not necessary to clarify the facts addressed in the proceeding,” the memorandum said.
The findings strengthen the case assembled by Aneel’s inspectors and reduce the likelihood that the company’s principal defenses will be accepted by the board.
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