In brief
ONS is weighing activating on the September 7 holiday the emergency protocol that orders distributors to curtail plant generation during low-load periods, per CNN Brasil and Poder360.
The probability is low for Monday and moderate for Sunday, September 6, per Poder360; the trigger is oversupply when industry stops and residential solar generation stays high.
The protocol was already activated on June 7 and August 23 this year, and ONS says its teams keep monitoring conditions to ensure operation during low-load periods.
What we know
04Verified fact
Per Poder360, ONS rates the probability as low on Monday and moderate on Sunday, September 6, and the plan was already activated on June 7 and August 23, 2026.
It quantifies the risk and the recent history.
Sources[02]Verified fact
The protocol orders distributors to curtail generation from large and small plants to keep the instantaneous balance between supply and demand.
It describes the plan's mechanism.
Sources[02]
Transmission to assets
Market read-through
For wind and solar generators in the free market, each activation means unsold energy without guaranteed compensation, the subject of the dispute over curtailmentPower GridThemeBrazil's power transmission and distribution infrastructure and its operation by grid operator ONS — including renewable-absorption limits and curtailment mechanisms.Open in the Market Map ↗ costs at Aneel.
For distributors, the protocol shifts to them the execution of cuts in distributed generation, with operational and consumer-complaint risk.
Portfolio impact
01Generation cuts at low load reduce energy sold by wind and solar plants without guaranteed compensation.
Negative and one-off.
What would change the view: The read changes if the plan is not activated or if Aneel sets compensation.
Direction is an explanatory hypothesis, not a forecast or recommendation.
Next signals
What to watch
- ONS's Monday bulletin on whether the plan was activated.
- Aneel's decision on compensation for renewable generation cuts.
Limits of the reporting
What remains uncertain
- Coverage does not give the megawatt volumes that may be cut.