Power Markets Weekly
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VOL 13 | NUM 1 | 31 July 2026
Power Markets Weekly
CHILE  |  13 - 19 July 2026
Power Markets Weekly is a brief weekly review of the electric market operation in Chile, Mexico, Iberia, France and Italy. If you are not a subscriber, please feel free to subscribe here
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Wind participation set a new record, surpassing 40% of the total system generation at its peak
Glossary
Global SEN operation
The average price in Polpaico was USD 39.7/MWh, which is 58.0% lower than last week and 69.6% lower compared to one year ago.
Marginal cost evolution in Polpaico during past years
Marginal cost evolution in Polpaico during past years
Recent rainfall reduced thermal generation to decreased their participation in the energy mix compared to the last week, while hydro and renewables increased their shares.
Thermals declined their participation due to a fall in coal by 7.2 pp, oil by 3.8 pp and gas by 3.1 pp.
Improved hydrological conditions boosted hydro share, mainly driven by an 8.3 pp rise in dam participation and a 2.4 pp increase in run-of-river share.
Rainfall led to a decline in the variable cost of dam-stored energy from USD 116/MWh to USD 45/MWh.
Renewables increased their share in the mix overall. Wind increasing by 8.6 pp, although solar decreased by 3.2 pp.
Wind participation set a new record on Thursday at 6 AM representing 41.1% of the generation.
Peak demand was 12.3 GW at 12 PM on Tuesday, with solar and wind accounting for 56.3% of the generation.
BESS participation peaked at 9 PM on Monday with 22.7%.
Starting on Thursday, several transmission lines experienced service interruptions due to adverse weather conditions associated with the rainfall, contributing to a decline in power generation.
Generation Mix
Generation Mix
Variation
Variation
Power range by energy sources (average prices)
Power range by energy sources (average prices)

Learn more about this chart

Generation evolution
Generation evolution
Geothermal
Cogeneration
Biomass
Coal
Gas
Oil
BESS
Dam
Run-of-river
Wind
PV Solar
CSP
The 500 kV Nueva Pan de Azúcar – Polpaico line was congested during solar hours on Wednesday and Friday, resulting in a price decoupling from Polpaico southward.
The 220 kV Charrúa – Santa Clara line experienced congestion during the early morning on Monday and Wednesday, as well as during solar hours on Tuesday and Wednesday. This congestion decoupled prices in the south zone of the system.
Another main transmission constraint occurred on the 220 kV Lastarria – Ciruelos line, which was congested during solar hours on Friday, Saturday and Sunday. This congestion also led to price decoupling in the southern part of the system.
The weekly peak price among the reference nodes was registered on Friday at 11 AM, when the price was set by oil-fired power plant Trapén, reaching USD 321.0/MWh at Puerto Montt.
Marginal cost evolution
Marginal cost evolution
Crucero
USD 35.2/MWh
Cardones
USD 34.9/MWh
Pan de Azúcar
USD 35.3/MWh
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Polpaico
USD 39.7/MWh
Charrúa
USD 38.6/MWh
Puerto Montt
USD 49.4/MWh
Solar and Wind production & BESS dispatch
Solar injection decreased its system-wide plant factor by 3.1 pp compared to last week, reaching 9.6%. The highest plant factor was 13.2% in Crucero zone while the lowest was in Charrúa area with 2.8%.
Wind injection increased its system-wide plant factor by 11.3 pp compared to last week, reaching 30.2%. The highest plant factor was 40.2% in Cardones zone while the lowest was in Crucero area with 24.1%.
BESS decreased its system-wide injections by 19.5 GWh compared to last week, reaching a total of 89.5 GWh. The largest decline was observed in Cardones zone with a reduction of 9.1 GWh, while the largest increase occurred in Polpaico area with an additional 1.7 GWh.
The combined curtailment rate for solar and wind generation increased by 8.0 pp compared to last week, reaching 11.5%. Solar curtailment reached 11.8% | 34.9 GWh while wind curtailment was 11.5% | 45.3 GWh.
Hourly Solar production
Hourly Solar production
Hourly Wind production
Hourly Wind production
Hourly BESS dispatch
Hourly BESS dispatch
PV capture price
Crucero
USD 22.4/MWh
Cardones
USD 28.6/MWh
Pan de Azúcar
USD 41.4/MWh
​
​
Polpaico
USD 36.7/MWh
Charrúa
USD 23.9/MWh
Puerto Montt
USD 103.3/MWh

Energy weighted average spot price using PV production by zone

Wind capture price
Crucero
USD 33.7/MWh
Cardones
USD 22.7/MWh
Pan de Azúcar
USD 17.2/MWh
​
​
Polpaico
USD 36.3/MWh
Charrúa
USD 37.3/MWh
Puerto Montt
USD 39.3/MWh

Energy weighted average spot price using wind production by zone

BESS discharge capture price
Crucero
USD 53.2/MWh
Cardones
USD 65.6/MWh
Pan de Azúcar
USD 37.8/MWh
​
​
Polpaico
USD 58.8/MWh
Charrúa
USD 41.0/MWh

Energy weighted average spot price using BESS discharge by zone

BESS charge capture price
Crucero
USD 27.1/MWh
Cardones
USD 35.1/MWh
Pan de Azúcar
USD 19.6/MWh
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​
Polpaico
USD 35.0/MWh
Charrúa
USD 43.9/MWh

Energy weighted average spot price using BESS charge (both from co-located power plant and from grid) by zone

BESS charge capture price
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