Geographic distribution shows 71.1 percent of registered capacity concentrated in Brazil’s Northeast region, with the Southeast accounting for 18.8 percent. This clustering reflects EPE’s preliminary location bonus methodology, which identified the Northeast and northern Minas Gerais as priority areas for grid support. The location incentive rewards projects installed where the National Interconnected System (SIN) faces operational constraints from rapidly expanding solar and wind generation that frequently exceeds transmission capacity or local demand.
EPE registered 5,296 projects totaling 261.4 GW for the national content category and 5,734 projects representing 281 GW for the open category, with 4,939 projects simultaneously registered in both auctions. The agency emphasized that registration figures do not guarantee auction participation, noting that the modular nature of battery projects and the absence of environmental licensing requirements at the registration stage contributed to the outsized response. The qualification phase serves as the critical technical evaluation mechanism to separate viable projects from speculative registrations.
The auction addresses a projected 55 GW capacity deficit through 2034 identified in Brazil’s 10-year energy expansion plan. Contracted systems must use entirely new batteries with minimum 30 MW capacity, four-hour discharge duration, maximum six-hour recharge time, and 85 percent round-trip efficiency. Winners will sign 15-year availability contracts beginning August 2028, providing firm capacity to absorb renewable energy surpluses during peak production hours and discharge during high demand periods. The storage procurement represents a fundamental shift from thermal generation, with industry association ABSAE estimating annual savings of R$3.2 billion compared to gas and oil-fired alternatives at projected battery costs of R$1-1.7 million per MW annually versus R$2.25-5 million for thermal plants.
This article was curated and published as part of our South American energy market coverage.
