Energy auctions: electric sector debates battery cost-recovery
The future of large-scale energy storage in Brazil is in the spotlight, sparking intense debates among key stakeholders in the electric power sector. The National Electric Energy Agency (ANEEL) has opened public consultations to shape upcoming capacity reserve auctions aimed at installing battery energy storage systems.
However, a crucial point has generated significant disagreement: who will bear the costs of this new infrastructure, which is essential for grid stability.
The core issue revolves around the cost-recovery model for contracting these batteries. Currently, the prevailing proposal, backed by consumer representatives and energy distribution companies, is that generators should be entirely responsible for covering these costs.
This view, however, faces resistance from other segments of the sector, which are seeking a more equitable distribution of financial burdens to avoid overburdening a single link in the energy supply chain.
Debate over financial responsibility
ANEEL‘s public consultations 22 and 23/2026 served as the stage where these differing views on financing energy storage batteries came to light.
The goal is to improve the bidding documents and contracts for capacity reserve auctions, ensuring that the expansion of this technology—which is fundamental for integrating intermittent renewable sources such as solar and wind—occurs efficiently and fairly for all parties involved.
Defining this cost-recovery model is seen as a decisive step toward unlocking investments in energy storage systems.
Cost-sharing proposals
While the current led by distributors and consumer associations advocates for maintaining a model where generators assume the costs, other entities have put forward alternative proposals.
The argument is that the need for batteries benefits the entire electric power value chain, from generation to the end consumer, directly impacting the security and quality of supply.
Therefore, the idea is that the cost could be shared among generators, distributors, and potentially even through specific tariffs that reflect the benefit of the ancillary service provided by storage systems.
Next steps and the future of storage
ANEEL will now analyze the input received during the public consultations to make an informed decision regarding the cost-recovery model.
Getting this definition right is crucial for advancing the deployment of batteries in energy auctions in Brazil, allowing the country to make the most of its clean energy potential and ensure a more resilient and reliable power system for the future.
The expectation is that the Agency will issue a ruling in the coming months, charting the path for upcoming auctions.
