en.Wedoany.com Reported - Recently, the Brazilian Ministry of Mines and Energy released guidelines for a battery energy storage capacity reserve auction, formally establishing a regulatory framework for the country's first capacity auction targeting battery energy storage systems. This auction is incorporated into the 2026 capacity reserve auction system, aiming to provide dispatchable reserve power capacity for Brazil's National Interconnected Power System through new electrochemical storage facilities.
The design of this mechanism elevates battery storage from a mere supporting facility to an independent capacity resource. According to the published schedule, the auction will be divided into two sessions: a "National Localized Storage Auction" and a general storage auction, planned for December 2 and December 4, respectively. Participating projects must be new battery energy storage systems connected to Brazil's National Interconnected Power System, either via independent connection points or shared connection points and related dedicated facilities with other power assets. Winning projects will sign 15-year capacity reserve power contracts, with the supply period starting on August 1, 2028. In terms of technical requirements, each project must have a minimum available power of 30 megawatts, a continuous operation duration of no less than 4 hours, a total system efficiency of at least 85%, a full charging time not exceeding 6 hours, and must meet grid connection technical requirements proposed by the Brazilian Energy Research Company and the National Electric System Operator, including grid-forming functionality requirements.
In recent years, Brazil's power system has seen increasing demand for new energy regulation beyond wind, solar, and hydropower. With battery storage entering the capacity auction system, the operational logic will shift from "generating power when electricity is available" to "releasing power when the system needs it," facilitating rapid response during evening peaks, transmission constraints, renewable energy output fluctuations, and local grid stress. For regions with significant spatial mismatches between renewable energy and load, such as Northeast and Southeast Brazil, storage projects integrated with key grid nodes could alleviate some transmission constraints and improve renewable energy absorption efficiency. The new rules also introduce a localized session, requiring systems that meet local production and certification conditions to participate preferentially, potentially driving the industrial chain for cells, inverters, system integration, energy management, fire safety, grid connection control, and operation and maintenance services. Compared to traditional generator sets, battery storage has shorter construction cycles and more flexible deployment methods, but its revenue model heavily depends on capacity compensation, dispatch rules, equipment costs, cycle life, and grid connection point value. Subsequent bidding results will directly influence the formation speed of Brazil's storage business model.
Companies must complete project registration with the Brazilian Energy Research Company between June 15 and July 31. Since this auction allows projects to temporarily forgo submitting preliminary, installation, or operation permits during the technical qualification phase, winning projects will still need to fulfill permits, financing, equipment certification, grid connection, and construction conditions in subsequent stages. If the auction proceeds smoothly, Brazil will establish a capacity procurement model for large-scale battery storage, also providing a reference storage system pathway for other high-renewable-energy-penetration markets in Latin America.
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