ANEEL has approved the final rules for Brazil’s large-scale battery storage auctions
EPE registered 6,091 projects with close to 300 GW capacity across the two auctions in August 2026
Winning projects will secure 15-year contracts starting from August 2028
Brazil’s energy regulator, the National Electric Energy Agency (ANEEL), has approved the final rules for the country’s first large-scale battery energy storage auctions scheduled to be held on December 2 and 4, 2026.
The auctions will procure power availability from standalone battery energy storage systems (BESS) with contracts starting from August 1, 2028, and running for 15 years.
The first auction, under Tender Notice No. 05/2026, requires equipment to meet domestic content criteria and minimum technical requirements dubbed National Storage category. Tender Notice No. 06/2026, under the Storage category, covers eligible projects for the second auction without the same domestic content requirement.
Successful projects must be able to deliver their contracted maximum power for four hours/cycle, for up to two cycles a day, and a maximum of 366 cycles a year. The systems must also be capable of recharging fully within six hours. Both the auctions will contract power availability in MWs.
Payments will be based on fixed annual revenue, paid in 12 monthly installments. The amount may be reduced depending on operational performance.
ANEEL has also lowered the reference investment cost used to calculate financial guarantees, from BRL 9.8 million/MW to BRL 6 million/MW. The agency said this would reduce entry barriers and encourage competition.
These plans follow the Ministry of Mines and Energy launching a public consultation for the auctions as part of the 2026 Reserve Capacity Auction (LRCAP)—Storage in November 2025 as part of Brazil’s efforts to secure grid stability and affordable tariffs (see Brazil Announces Country’s Maiden Battery Storage Systems Auction).
In August 2026, the Energy Research Office (EPE) completed the registration process for projects interested in participating in the LRCAP auctions. It registered a total of 6,091 projects representing 296.8 GW of power capacity.
Brazil’s solar energy association, ABSOLAR, has reportedly proposed a storage target of at least 8 GW by 2030 to be able to take advantage of renewable energy expansion and prepare the grid for the energy transition.
