When it comes to energy storage, Brazil is "almost" ready. We already have the demand, we have abundant natural resources, and we have the urgency. The only thing missing to unlock the next investment cycle is economic clarity.
In recent years, the Brazilian electricity sector has undergone profound transformations driven by the expansion of renewable energy sources, the need for regulatory modernization, and, above all, the technological advancement of battery energy storage systems (BESS).
But one point remains the true watershed for the consolidation of this new energy frontier: the quality of our price signal.
If there's one thing that international experience has made clear, and that our initial local studies are beginning to confirm, it's that storage only thrives where there is adequate compensation for flexibility, capacity, and ancillary services. In other words: storage prospers where the price reflects the true value of the system.
Right now we need to maintain the natural optimism of a good Brazilian, but we must also be critical and admit that we still don't have the right economic signals, especially when we look at large-scale energy projects.
Although most of the debate on energy storage in Brazil is focused on large projects — whether they are co-located to renewable power plants or designed for capacity auctions — there is a silent but extremely relevant dynamic happening on another front: the advancement of BESS in smaller applications within the regulated market.
The motivation is clear: improved power quality, reduced outages and interruptions, operational safety, and mitigation of costs associated with demand and peak hours.
These smaller projects function as a kind of "living laboratory" for the industry, and are already beginning to create an ecosystem that reduces risks and uncertainties for more robust investments in the future.
However, it is crucial to recognize one point: this initial wave of adoption is not enough to unlock the expansion of BESS on the scale we need in Brazil.
For larger projects—those capable of preventing the waste of tens of tons of renewable energy, increasing security of supply, and reducing the structural cost of the National Interconnected System (SIN)—to become viable, it is essential that Brazil improves its price signal.
Without a granular and transparent hourly price that reflects flexibility, the value of storage is lost in the current model.
With a clear signal, the BESS ceases to be a "tactical" piece of equipment and becomes a strategic asset, remunerated for its ability to level load, absorb surpluses, reduce ramps, provide reserve capacity, and deliver ancillary services.
In summary, BESS is already spreading in the regulated market, on a small scale, driven by real and immediate needs, but its structural and large-scale expansion will only happen when the price signal follows this evolution.
That's exactly what I witnessed during my first international immersion in Texas (United States) to see the dynamics of energy storage, which relies heavily on the dynamic pricing logic of the ERCOT (Electric Reliability Council of Texas) market.
There, the electricity grid management system is characterized by being an unregulated, "energy-only" market, largely isolated from other US interconnections, in which batteries operate as pure arbitrage instruments: they charge when there is excess renewable generation and prices fall to very low or negative levels, and discharge during "peak price" periods, when demand rises rapidly in the late afternoon and prices can skyrocket.
It is a market completely exposed to volatility, without regulated tariffs or tariff moderation mechanisms, allowing operators to fully capture price spreads during extreme time intervals. This environment encourages investment, as the "buy low and sell high" model is transparent and remunerated in real time.
It was precisely this arrangement that transformed BESS from an experimental solution into a vital reliability asset in Texas, helping the system avoid emergencies even during severe heat waves.
Furthermore, the possibility of very high prices at the peak ("peak price events") boosts the economic viability of projects, making BESS a strategic instrument for stabilizing the grid and generating predictable revenue in a market entirely based on economic signals.
This shows us that the price signal is an essential cog in the machine. With it, we allow the market to see flexibility for the valuable asset that it is. Without it, we continue to restrict our potential and waste energy.
BESS has already proven that it works. The market has already shown that it wants to invest. International experience has already shown that the path is viable and fast.
Now it's up to Brazil to adjust the signal. When that happens, the expansion of energy storage will cease to be a promise and will become a structural reality of the Brazilian electricity sector.
The opinions and information expressed are the sole responsibility of the author and do not necessarily represent the official position of the author. Canal Solar.
