The National Electric Energy Agency (ANEEL) has opened a public consultation for its sole electricity transmission auction of 2025, set for October 31 in São Paulo. The auction will license 11 lots focusing on constructing and maintaining almost 1,200 kilometers of new or upgraded transmission lines, increasing the grid’s transformation capacity by 4,400 MVA. The projects include advanced components like fast automatic reactive power control and synchronous compensations to enhance system stability. Investment forecasts reach approximately R$4.06 billion (around US$724 million), with project completion timelines estimated between 42 and 60 months. These developments are expected to generate around 10,800 jobs across multiple Brazilian states including Goiás, Maranhão, Mato Grosso, Minas Gerais, São Paulo, and others.
Among the lots, several demand investments exceeding R$1 billion, with Lot 7 being notably capital-intensive at R$1.21 billion (approximately US$215 million) due to the construction of 35 kilometers of underground transmission lines alongside the São Miguel substation upgrade in São Paulo state. Some lots are contingent on the final resolution of contract expirations connected to projects awarded in 2020 and 2021, primarily involving MEZ Energia, due to delays in execution.
In parallel, the Ministry of Mines and Energy (MME) has launched consultations for Brazil’s first-ever battery storage capacity reserve auction (LRCAP) slated for June 2025. This auction targets battery energy storage systems (BESS) of at least 30 MW with a guaranteed minimum daily discharge of four hours, offering 10-year contracts commencing in July 2029. Projects must demonstrate technical qualification before the Energy Research Company (EPE) and adequate grid access capacity. The framework envisions a fixed annual remuneration subject to performance-based adjustments and emphasizes operational flexibility for the National System Operator (ONS) to dispatch energy as needed.
These battery storage initiatives mark a strategic move to bolster grid flexibility and support the integration of intermittent renewables like solar and wind. By enabling energy dispatch during peak demand or grid instability, these systems reduce dependence on fossil fuel-based thermal plants. Leading industry voices underscore the transformational potential of this auction to catalyze Brazil’s energy storage market, foster domestic manufacturing, and expand ancillary service capabilities.
Looking ahead, a second battery auction is under consultation for 2026, reflecting the government’s commitment to scaling storage capacity in alignment with the country’s clean energy targets. Analysts project that Brazil will need to secure roughly 13 GW of firm energy capacity—including hydro, thermal, and battery storage solutions—over the coming years to balance increasing renewable generation. Major companies such as China General Nuclear Power Group, Statkraft, and Elera Renewables are preparing to incorporate battery storage into wind and solar projects, signaling growing industry confidence despite regulatory complexities.
These coordinated efforts in transmission expansion and energy storage procurement underscore Brazil’s strategic vision to modernize its electricity grid, improve operational resilience, and support the ongoing decarbonization of its power sector. The successful execution of the 2025 auctions will be a critical milestone in strengthening the nation’s energy infrastructure and fostering sustainable growth in line with global clean energy trends.
This article was curated and published as part of our South American energy market coverage.
