How much wind and solar generation has Brazil curtailed?
History of constrained-off (generation curtailment ordered by system operations) on the SIN (the national grid), reported by ONS by plant and 30-minute period. Data through junho de 2026 — methodology and limitations (in Portuguese).
New Waste 2025 — the 20 plants that wasted the most energy (in Portuguese), with curtailment valued hour by hour at PLD (Brazil's spot price).
Energy curtailed in period
39,0 TWh
jul/25 – jun/26
Curtailment rate in period
21,5%
curtailment ÷ (generation + curtailment)
Curtailment in junho de 2026
2,74 TWh
−14% vs previous month
Share from energy reason (ENE)
61,3%
non-compensable (Law 15.269/2025)
Monthly curtailment by reason — Wind
Energy curtailed (TWh) by restriction reason
- Energy reason (ENE)
- Reliability (CNF)
- External unavailability (REL)
Monthly curtailment by reason — Solar
Energy curtailed (TWh) by restriction reason
- Energy reason (ENE)
- Reliability (CNF)
- External unavailability (REL)
Monthly curtailment rate — Wind
curtailment ÷ (verified generation + curtailment), by month
Monthly curtailment rate — Solar
curtailment ÷ (verified generation + curtailment), by month
Curtailment by state in period
Energy curtailed by state and reason, jul/25 – jun/26
- Energy reason (ENE)
- Reliability (CNF)
- External unavailability (REL)
Most affected plants and clusters in the period
Top 10 by energy curtailed; rate = curtailment ÷ (generation + curtailment)
| Plant / cluster | Source | State | Curtailment | Curtailment rate |
|---|---|---|---|---|
| CONJ. JANAÚBA | Solar | MG | 918 GWh | 27,7% |
| CONJ. ARINOS 2 500 KV | Solar | MG | 749 GWh | 24,4% |
| CONJ. SERRA DO MEL A | Wind | RN | 711 GWh | 31,6% |
| CONJ. RIO DO VENTO | Wind | RN | 688 GWh | 29,3% |
| CONJ. CAJU | Wind | RN | 664 GWh | 23,8% |
| CONJ. SERRA DO MEL B | Wind | RN | 618 GWh | 29,3% |
| CONJ. RIO DO VENTO EXPANSÃO | Wind | RN | 577 GWh | 22,3% |
| CONJ. SERRA DO ASSURUÁ | Wind | BA | 546 GWh | 15,9% |
| CONJ. SANTO AGOSTINHO | Wind | RN | 546 GWh | 32,8% |
| CONJ. CURRAL NOVO DO PIAUÍ II 230 KV | Wind | PI | 518 GWh | 12,3% |