National Electric Energy Agency (ANEEL) has granted its first authorization for the integration of a co-located energy storage system at the Sol de Brotas 7 photovoltaic plant, located in Uibaí, Bahia, marking a key milestone in Brazil’s energy storage and regulatory landscape.
The authorization allows for the deployment of a battery energy storage system directly connected to the Sol de Brotas 7 Photovoltaic Plant, enabling shared use of grid connection infrastructure. Under the co-location model, the storage system operates alongside the generation asset, storing electricity and dispatching it to the grid based on demand requirements.
The initiative is being implemented in accordance with existing regulatory frameworks, with the addition of the storage system treated as a modification to the technical characteristics of the generation project. Existing rules related to grid access, energy measurement, and system use contracting remain applicable.
Speaking at the signing ceremony, ANEEL Director-General Sandoval Feitosa highlighted the importance of regulatory modernization in addressing the evolving needs of the power sector. He noted that energy storage technologies, particularly battery systems, will play a critical role in managing the anticipated growth of renewable energy capacity in Brazil, while ensuring system reliability and investor confidence.
The storage system will utilize lithium-ion battery technology and will feature a nominal storage capacity of 5,016 kWh, with an installed capacity of 1,250 kW. The associated power conversion system is rated at 2,300 kW, with an inverter output voltage of 0.60 kV. The system will be physically integrated into the solar plant’s infrastructure and will operate under shared metering and billing arrangements.
The project forms part of a broader regulatory effort by ANEEL to establish a comprehensive framework for energy storage in Brazil. Since 2022, the agency has undertaken technical studies, public consultations, and pilot initiatives to define regulatory guidelines covering system access, remuneration structures, and operational integration within the National Interconnected System.
In October 2025, ANEEL issued specific guidelines for the implementation of co-located storage systems in already licensed generation assets, paving the way for commercial deployment.
According to Ludimila Lima da Silva, Superintendent of Concessions, Permits and Authorizations for Electricity Services, the authorization represents a milestone in integrating energy generation with storage technologies, contributing to the modernization and reliability of Brazil’s electricity sector. She also emphasized the significance of the development as ANEEL marks 30 years since its establishment.
The event was attended by ANEEL officials, including director Agnes da Costa, as well as representatives from industry organizations such as Brazilian Photovoltaic Solar Energy Association, Brazilian Wind Energy Association, and Brazilian Association of Energy Storage Solutions.
The authorization underscores Brazil’s commitment to strengthening energy security, enabling renewable integration, and advancing regulatory certainty for emerging technologies such as energy storage.
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