Weekly Market Analytics Chile Vol 11 Num 47

VOL 11 | NUM 47 | 13 June 2025

Power Markets Weekly

CHILE | 2 - 8 June 2025

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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Notable increase in the share of gas compensates for the low availability of renewables.

Global SEN operation

This week’s average marginal cost in Polpaico was USD 68.6/MWh, which is 18% higher than last week and 13% higher compared to one year ago.

Marginal cost evolution in Polpaico during past years

A decrease in demand was accompanied with a reduction in the participation of renewables and a significant increase of thermal’s share.

On the one hand, renewables had decreases in run-of-river by 1.6 pp., wind by 3.8 pp. and solar by 1.6 pp., even though, there were increases in dam and biomass participation by 1.1 pp. and 0.4 pp., respectively.

On the other hand, thermals had a huge increase in their share led by a 7.1 pp. of gas. However, there were also decreases in coal by 0.5 pp. and oil 0.4 pp.

BESS injections had a decrease in their participation by 0.3 pp.

Peak demand reached 11.3 GWh/h on Tuesday at 11 AM with renewables covering 70.4% of the load. The 3 main contributing techs were solar with 40.4%, dam with 11.0% and run-of-river with 9.6%.

Generation Mix

Variation

Power range by energy sources (average prices)

Learn more about this chart

Generation evolution

Geothermal

Cogeneration

Biomass

Coal

Gas

Oil

BESS

Dam

Run-of-river

Wind

PV Solar

CSP

The 220 kV line Lastarria – Ciruelos decoupled Puerto Montt from Monday night until early Tuesday morning.

The 500 kV line Nueva Pan de Azúcar – Polpaico remained congested from Monday to Saturday during solar hours, decoupling the system from Pan de Azúcar to the north.

The 500 kV line Alto Jahuel – Lo Aguirre was congested on Saturday and Sunday during solar hours, decoupling the system from Charrúa to the south.

The peak marginal cost was registered in Puerto Montt on Friday at 11 AM, reaching USD 159.6/MWh. At that time, thermals covered 30.6% of the generation: gas with 21.8%, coal with 8.2%, and oil with 0.6%.

Marginal cost evolution

Crucero
USD 50.6/MWh

D. de Almagro
USD 50.9/MWh

Pan de Azúcar
USD 52.2/MWh

Polpaico
USD 68.6/MWh

Charrúa
USD 73.1/MWh

Puerto Montt
USD 73.4/MWh

Solar and Wind production & BESS dispatch

Solar generation reached 277.5 GWh with an average plant factor of 14.8%. The highest plant factor was registered in Crucero (18.0%), while the lowest was in Puerto Montt (3.4%).

Wind generation reached 203.0 GWh with an average plant factor of 20.2%. The highest plant factor was registered in Diego de Almagro (30.7%), while the lowest was in Polpaico (7.7%).

BESS injections reached 30.1 GWh with an average plant factor of 13.1%. The highest plant factor was registered in Crucero (15.6%), while the lowest was in Polpaico (4.4%).

On Wednesday and Thursday mornings, the usual BESS injections weren’t registered.

This week’s curtailment rate was 3.4% for wind and 9.7% for solar, reaching an average curtailment rate of 7.1%, which is higher than last week by 1.1 pp.