Analysis by Clean Energy Latin America consultant Marília Rabassa indicates battery storage could reduce total capacity costs by up to 48 percent and carbon emissions by 66 percent compared to fossil fuel thermal plants, while also delivering operational efficiency gains. Storage systems can also mitigate severe daily price volatility in the Differences Settlement Price (PLD), which has varied from R$61/MWh to R$712/MWh in cases presented by the Chamber of Electric Energy Commercialization (CCEE).
Practical deployments are demonstrating operational value. Transmission operator ISA Energia’s battery system at the Registro substation in São Paulo state proved essential during summer peak periods, preventing manual load cuts and stabilizing voltage in critical coastal areas. A pilot project by a distribution utility in Paraná state using a 10 MW/20 MWh BESS showed measurable improvements in supply continuity indicators and reductions in overload events and voltage collapses.
Brazil’s National Electricity Agency (ANEEL) approved the country’s first co-located storage authorization in April 2026, a 1.25 MW/5 MWh lithium-ion battery system linked to Statkraft’s Sol de Brotas 7 solar plant in Bahia. The regulatory framework for co-located storage at existing generation facilities was published in October 2025. The system can consume energy from both the solar plant and the grid, sharing metering and billing infrastructure with the generation facility.
Sector studies delivered to ANEEL by the National Academy of Engineering and CIGRE-Brasil estimate Brazil may require approximately 35 GW of dispatchable sources by 2035 to avoid supply failures during peak consumption hours. In March 2026, the government contracted 18.98 GW in a capacity reserve auction featuring thermal and hydroelectric projects, though sector analyses indicate total requirements exceed this volume. Energy waste from curtailment has reached 5,135 MW on days of excess solar generation, underscoring the mismatch between generation timing and demand patterns as distributed solar reached 5.6 percent of total electricity generation in 2024, supplying roughly 13 percent of captive national consumption according to EPE data.
This article was curated and published as part of our South American energy market coverage.
