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VOL 13 | NUM 7 | 4 September 2026
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CHILE | 24 - 30 August 2026
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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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DNV offers tools for Wholesale Market analysis and operation:
- DNV Power Analytics (DNV-PA) is our web-based platform that provides access to constantly updated long-term energy price forecasts.
- With a refined design and an improved user experience we are upgrading our digital services for our customers.
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BESS capacity continues to expand, while Polpaico’s average marginal cost remains below last year's
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The average price in Polpaico was USD 36.4/MWh, 31.4% higher than last week and 22.9% lower than the same week one year ago.
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Marginal cost evolution in Polpaico during past years
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This week, the thermal generation share increased by 3.0 pp, driven by rises in gas (+1.9 pp), oil (+1.0 pp) and coal-fired (+1.9 pp) generation shares.
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Hydro share did not change in comparison to last week, with dam generation share down by 1.5 pp, compensated by 1.5 pp rise of run-of-river .
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The solar generation share fell by 0.9 pp this week, while wind generation share dropped by 1.0 pp.
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Generation peaked at 12.1 GW on Tuesday at 4 PM, with solar and wind accounting for 54.8% of the total output.
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BESS injection to the system peaked at 9 PM on Wednesday, representing 24.0% of the total output.
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At the end of the week, 30 facilities remained under commissioning across the SEN, including 20 BESS projects, 4 wind farms, 3 solar plants, 2 hydro facilities and 1 thermal plant.
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Generation Mix
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Variation
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Power range by energy sources (average prices)
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Geothermal
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Cogeneration
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Biomass
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Coal
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Gas
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Oil
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BESS
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Dam
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Run-of-river
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Wind
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PV Solar
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CSP
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This week, marginal costs peaked at USD 179.9/MWh in Crucero on Monday at 1 AM, set by the gas-fired plant Taltal U1.
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During the week, the following congestions were presented in the grid:
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- Jadresic 500/220 kV transformer, due to the wind generation in the area on Friday and Saturday;
- 500 kV Nueva Pan de Azúcar - Polpaico line on Monday;
- 500 kV Ancoa - Charrúa line everyday of the week;
- 220 kV Charrúa - Santa Clara, due to the wind generation in the area on Friday and Saturday;
- 220 kV Lastarria - Ciruelos, on Wednesday and Sunday.
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Crucero
USD 36.2/MWh
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Cardones
USD 35.9/MWh
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Pan de Azúcar
USD 36.1/MWh
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Polpaico
USD 36.4/MWh
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Charrúa
USD 13.0/MWh
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Puerto Montt
USD 11.7/MWh
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Solar and Wind production & BESS dispatch
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Solar output decreased by 0.2% | 0.5 GWh compared to last week. Regarding the plant factor, the highest was 18.6% in Cardones, while the lowest was 4.5% in Puerto Montt. The system-wide solar plant factor was 14.3%.
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Wind generation decreased this week by 2.4% | 6.1 GWh relative to last week. The highest plant factor was 42.1% in Puerto Montt, while the lowest was 8.6% in Polpaico. The system-wide wind plant factor was 21.8%.
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BESS showed a decrease in injection of 1.0% | 1.3 GWh, and a rise in charges by 8.6% | 12.0 GWh, relative to last week. Based on the hourly BESS dispatch profile, injections continue to occur predominantly before midnight, resulting in a significant reduction in BESS injections during the early morning hours.
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This week, curtailment rates reached 16.5% | 50.1 GWh for wind and 9.2% | 39.2 GWh for solar. This resulted in a combined system-wide curtailment rate of 12.0%, which represents an increase of 2.4 pp relative to last week.
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Crucero
USD 11.8/MWh
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Cardones
USD 12.6/MWh
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Pan de Azúcar
USD 12.1/MWh
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Polpaico
USD 4.7/MWh
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Charrúa
USD 2.3/MWh
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Puerto Montt
USD 3.6/MWh
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Energy weighted average spot price using PV production by zone
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Crucero
USD 33.2/MWh
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Cardones
USD 30.6/MWh
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Pan de Azúcar
USD 37.3/MWh
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Polpaico
USD 35.4/MWh
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Charrúa
USD 7.2/MWh
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Puerto Montt
USD 12.0/MWh
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Energy weighted average spot price using wind production by zone
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BESS discharge capture price
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Crucero
USD 47.5/MWh
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Cardones
USD 49.9/MWh
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Pan de Azúcar
USD 49.3/MWh
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Polpaico
USD 49.7/MWh
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Charrúa
USD 13.5/MWh
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Energy weighted average spot price using BESS discharge by zone
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BESS charge capture price
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Crucero
USD 10.5/MWh
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Cardones
USD 10.1/MWh
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Pan de Azúcar
USD 9.8/MWh
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Polpaico
USD 15.6/MWh
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Charrúa
USD 15.6/MWh
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Energy weighted average spot price using BESS charge (both from co-located power plant and from grid) by zone
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DNV, Magdalena 181, Las Condes, Santiago, Chile
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