The adoption of energy storage technology such as lithium-ion batteries and pumped hydro could reduce the average cost of the Brazilian electricity system by up to 16% in 2029, in addition to contributing to reliability and enabling a greater share of renewables without increasing. The adoption of energy storage technology such as lithium-ion batteries and pumped hydro could reduce the average cost of the Brazilian electricity system by up to 16% in 2029, in addition to contributing to reliability and enabling a greater share of renewables without increasing. Authorities and stakeholders in the electricity sector highlight the role of batteries in reducing costs, ensuring energy security, and expanding renewable energy. Projections from the Energy Research Company (EPE), in the Ten-Year Energy Plan (PDE 2035), indicate that Brazil can incorporate. The IEA examines the full spectrum of energy issues including oil, gas and coal supply and demand, renewable energy technologies, electricity markets, energy efficiency, access to energy, demand side management and much more. Through its work, the IEA advocates policies that will enhance the. Representing 24 of the country's leading power generation companies and over 60% of Brazil's total electricity production, Abrage highlighted the strategic importance of hydropower plants in ensuring the system's security, flexibility, and sustainability. During the presentation, it was emphasized. A recent study highlights that implementing energy storage technologies, such as lithium-ion batteries and pumped hydro, could lower Brazil's electricity system costs by up to 16% by 2029. These solutions are expected to improve system reliability and increase the integration of renewable energy. Decarbonisation of the energy sector will remain a top priority in Brazil, with a target to achieve a 45% share of renewables in primary energy demand by 2030 will require 81GW of renewables capacity, excluding hydropower, within that timeframe (CIF, 2021). **Increasing demand for renewable energy sources, 2. Advancements in battery technology enhancing efficiency, 4.