By Brazil Stock Guide – Brazil’s electricity regulator is expected to revisit the future of Enel’s São Paulo distribution business on August 11, when a senior director plans to present his decision on the Italian utility’s attempt to halt a regulatory process that could eventually lead to the loss of its concession.
Fernando Mosna, the director overseeing the case at the Agência Nacional de Energia Elétrica, or ANEEL, said he intends to bring the matter before the regulator’s governing board two days before his mandate expires on August 13.
The approaching vote adds urgency to one of the most politically sensitive disputes in Brazil’s power sector. Enel São Paulo supplies electricity to the country’s largest metropolitan area and has faced sustained criticism from public authorities and consumers following prolonged outages triggered by severe storms.
The August meeting will not decide whether Enel loses the concession. Instead, the board will consider the company’s appeal against ANEEL’s earlier decision to open an administrative proceeding aimed at assessing whether the concession should ultimately be declared forfeit — a measure known in Brazilian law as caducidade.
That distinction is important. A rejection of Enel’s appeal would allow the regulatory proceeding to continue, rather than immediately removing the company as operator. But it would leave the Italian-controlled group facing a formal process over the future of one of its most important Brazilian assets.
Mosna had given Enel ten days to submit its final arguments before completing his vote. The company filed its response on July 23, asking ANEEL to annul the decision that opened the forfeiture proceeding or, alternatively, to reverse it and resume the ordinary review of the concession’s renewal.
Carta-Enel-SP-230-2026-RB-Enel-SP-Manifestao-NT-e-Parecer.pdf
Enel’s defence rests partly on the argument that the regulator placed disproportionate weight on an extreme weather event in December 2025 while disregarding operational improvements recorded over roughly 16 months. The company says the regulatory assessment failed to consider its performance over the full monitoring period and instead allowed a single event to become the decisive test of whether its recovery measures had worked.
The more pointed argument, however, concerns the methodology used to assess the restoration of power. Enel says the decision opening the proceeding rejected a “simultaneous peak” methodology as an inadequate snapshot of the number of customers without electricity, yet relied on the 67 per cent restoration figure produced by that same method to support an adverse conclusion.
Under the methodology that Enel says was formally accepted in the decision — based on the total number of affected customers and the duration of interruptions — 80.2 per cent of customers had their power restored within 24 hours. The company argues that relying on the 67 per cent figure creates a contradiction between the methodology stated in the regulator’s reasoning and the numerical evidence used to justify the outcome.
Carta-Enel-SP-230-2026-RB-Enel-SP-Manifestao-NT-e-Parecer.pdf
Enel also claims that ANEEL had never formally agreed binding recovery targets with the company and that the regulator changed its assessment criteria during the process. It says the technical staff subsequently introduced comparisons with other São Paulo distributors that had not formed part of the original enforcement order or the recovery plan.
Carta-Enel-SP-230-2026-RB-Enel-SP-Manifestao-NT-e-Parecer.pdf
For investors and policymakers, the August 11 meeting will therefore be less a verdict on Enel’s continued presence in São Paulo than a test of whether ANEEL believes the original decision was sufficiently consistent and legally grounded to justify moving to the next stage.
Mosna’s vote will be closely scrutinised not only because of the scale of the concession, but also because of its timing. By bringing the case before the board immediately before leaving office, the director is seeking to prevent the appeal from remaining unresolved during a change in the regulator’s composition.
The outcome could either remove an immediate threat to Enel by closing the forfeiture track, or deepen the uncertainty surrounding the company’s position in Brazil’s most valuable electricity market. Even in the latter case, however, the dispute would still have further procedural and institutional stages before the concession could actually be terminated.
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