Real-time curtailment
R$8,701,471,499
accumulated from 01/01/2026 to now
Live estimate from ONS open data, verified through 09/26/2026. Details in the methodology.
Built on public data
The concept
Nameplate capacity is the factory promise; accepted generation is the grid’s call, hour by hour. The difference between the two is clean energy that never gets to exist. That is what Nameplate measures, forecasts and puts to work.
Illustrative scene: the real numbers, plant by plant, live in open data.
The climb
3.7% in 2022. 5.4% in 2023. 9.4% in 2024. In 2025, curtailment amounted to more than a fifth of all of Brazil’s delivered utility-scale wind and solar generation — 43.8 TWh that never got to exist.
Explore the dataAnnual index: curtailed energy ÷ delivered generation, utility-scale wind + solar · ONS open data (constrained-off and energy balance) · 2022–2025 · own calculation, published methodology
Why it will not end
ONS projects curtailment in about 14% of all hours by 2030, most of it structural energy surplus rather than a transmission bottleneck. New lines do not solve what is left over.
If the energy will be left over anyway, the question changes: who is ready to consume it when it is?
ONS projection, 2030 horizon · projected data-center demand, 2026–2030
What Nameplate does
From raw ONS data to a signal that switches machines on: Nameplate turns curtailment into usable information.
How we do itThe project
ECIT Henrique Fernandes de Farias, Curral de Cima, Paraíba, Brazil. A teacher and three student founders from the IT technical course, with the team still growing. SDGs 7, 9 and 12.
Teacher & Machine Learning Engineer
Mentors the team and owns the project’s engineering: from the ONS data pipeline to the forecasting model.
Founding student
Data and research front.
Founding student
Product and content front.
Founding student
Development front.
Methodology and data
Primary source: ONS open data on constrained-off, CC-BY licensed, updated twice a day. The whole calculation is published, assumptions and limitations on the table, and the data the site uses is downloadable.
The data is open, the math is public and the counter does not stop. Take the numbers into your analysis, story or research.