Capacity Reserve Auction 2025: The Role of Energy Storage in the New Electrical Matrix

With the publication of Ordinance No. 125/2024, the Brazilian Ministry of Mines and Energy (MME) has established guidelines for the 2025 Capacity Reserve Auction, marking an important step toward the use of battery energy storage systems (BESS) in the National Interconnected System (SIN). The measure aims to bring more flexibility and security to the Brazilian electrical system, especially in scenarios of high intermittency from renewable sources.

This ordinance not only acknowledges the importance of energy storage but also opens up new possibilities for both existing and future projects, particularly those related to renewable sources. With the increasing curtailment in solar and wind plants, energy storage emerges as a relevant alternative to mitigate losses and create new revenue streams.

Key Provisions of the Ordinance

• Auction in 2025: Battery storage systems with a minimum capacity of 30 MW will be contracted.
• Power Delivery: BESS must supply power for a minimum of 4 hours per day, as required by the National System Operator (ONS).
• Remuneration: Entrepreneurs will receive a fixed annual revenue, with adjustments in case of non-compliance with demand.
• Penalties: Revenue can be reduced by up to 30% for delivery failures.

Key Requirements and Deadlines

• Minimum capacity: 30 MW and continuous operation for 4 hours per day.
• Auction: Scheduled for June 2025.
• Contract start: July 2029, with possible adjustments based on SIN studies.
• Contract duration: 10 years.

BESS as a Solution for Renewable Power Plants

The use of BESS allows for the storage of excess energy generated by renewable plants, reducing the impact of curtailment. In addition to preventing losses, these systems enable stored energy to be sold during peak demand times, representing an additional revenue source for the projects. They also make new developments more viable by enhancing their capacity to deliver power.

Aeroespacial's Solution for BESS Optimization

Aeroespacial has developed a proprietary algorithm to define and optimize the integration of BESS systems in renewable generation projects. Adapted to the guidelines of Ordinance No. 125/2024, our solution aims to find the best configuration to meet the needs of the enterprise and the requirements of SIN.

Schedule with our specialists to discuss how we can support your project.