Electricity consumption in Brazil totaled 66.632 MW in August, according to data from the Electric Energy Trading Chamber (CCEE). This represents a 1,4% decrease compared to the same period in 2024.
Compared to July, there was a 1% increase, interrupting a five-month streak of decline. The CCEE analyzes two distinct market environments.
In the ACR (Regulated Contracting Environment), responsible for supplying distributors and most residential consumers, demand was 37.333 MWmed – a reduction of 1,2% compared to the previous year.
In the ACL (Free Contracting Environment), which allows the choice of energy supplier, consumption totaled 29.299 MWmed, a decrease of 1,7% in the same comparison.
The decline in consumption is attributed, in part, to milder autumn and winter temperatures, which reduce the use of refrigeration equipment, such as fans and air conditioners.
Sectors and regions
Among the 15 sectors of economic activity assessed by the CCEE, the positive highlights were the Sanitation (up 2,9%), Non-Metallic Minerals (0,7%), and Transportation (0,5%). Conversely, the largest declines occurred in Telecommunications (-5,6%) and Chemicals (-5,1%).
The Services sector, which includes shopping malls and large commercial establishments and represents the largest share of consumption in Mercado Livre, also saw a 5% drop, contributing to the negative ACL result.
Regionally, Acre (12,1%), Maranhão (7,2%) and Piauí (4,4%) recorded the largest increases in consumption. Mato Grosso do Sul (-8,8%), Amapá (-8,6%), Goiás and Rondônia (both with -4,5%) had the most significant reductions.
Reservoirs and system operation
At the same time, the ONS (National Electric System Operator) released, in the same period in which the CCEE presented its data, the PMO (Monthly Operation Program) bulletin for the week of October 4th to 10th.
The document highlights stability in reservoir levels across all of the country's subsystems, indicating a hydrological scenario favorable to maintaining national energy security.
The South region has the best EAR (Stored Energy) forecast—an indicator that measures the volume of water accumulated in hydroelectric reservoirs—with an expected 87,4% by the end of the month. Next comes the North (68,4%), the Northeast (49,2%), and the Southeast/Central-West (46,4%).
"We are monitoring reservoir scenarios in real time and are prepared to fully meet society's demands. We remain attentive to future projections to adopt the necessary measures to maintain the system's continued reliability and safety," stated ONS Director General Marcio Rea.
In turn, estimates of ENA (Influent Natural Energy) — volume of water reaching reservoirs — indicate that the South region should reach 121% of the MLT (Long Term Average), followed by the North (58%), Southeast/Central-West (52%) and Northeast (37%).
The MLT represents the historical average of rainfall and inflow volumes in a given period, used as a reference to assess whether the hydrological scenario is above or below expected behavior.
Load demand projections point to a 0,7% increase in the SIN (National Interconnected System), reaching 82.318 MWmed. The increase is driven mainly by the North (+6,5%), South (+0,6%) and Southeast/Central-West (+0,3%) regions, while the Northeast is expected to register a slight decline of 1,2%.
The CMO (Marginal Operating Cost) — an indicator that reflects the cost of generating energy in the system — is set at R$302,19/MWh for three of the subsystems, with the exception of the Northeast, which will have R$181,13/MWh in the next operating week.
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