AES Atacama Solar — BESS Emission Reduction Dashboard— 150 MW / 600 MWh / 4h / PV+BESS LFP
MADD Methodology §5.4 Ex-Ante Quantification | CEN 2024 + 2025
Analysis Year
Emission Factor 2024
0.4347
tCO₂ / MWh
RED 88,456 tCO₂ / 203,496 MWh discharged
Annual Summary — 2024
RED (tCO₂)
88,456
Net Emission Reduction
TGHGd (tCO₂)
88,456
Displaced by BESS
OSE (tCO₂)
16.2M
System Emissions
BESS (MWh)
139/150
Discharge / Charge per hour
Annual Emission Reduction Waterfall — 2024
tCO₂ — Full Year 2024
Average Marginal Discharge EF
tCO₂/MWh by month
Monthly RED
tCO₂ by month
Monthly Curtailment
MWh
Spot Price Distribution (hourly)
Box = IQR of hourly system averages; diamond = monthly median
Monthly Drill-Down
January 2024 — Hourly Displacement Detail (discharge)
Rows = discharge hours (CLT); cells coloured by tCO₂ displaced; hover shows per-tech MWh → tCO₂ breakdown
January 2024 — RED = 6,477 tCO₂
TGHGd = 6,477 tCO₂
January — Effective Discharge by Technology
% of MWh actually displaced by the BESS (sums to Bd)
January — Top 15 Displaced Units
by tCO₂ displaced by Bd (effective DORd only)
January — Most Frequent Marginal Units
Discharge — sets the marginal EF
February 2024 — Hourly Displacement Detail (discharge)
Rows = discharge hours (CLT); cells coloured by tCO₂ displaced; hover shows per-tech MWh → tCO₂ breakdown
February 2024 — RED = 7,075 tCO₂
TGHGd = 7,075 tCO₂
February — Effective Discharge by Technology
% of MWh actually displaced by the BESS (sums to Bd)
February — Top 15 Displaced Units
by tCO₂ displaced by Bd (effective DORd only)
February — Most Frequent Marginal Units
Discharge — sets the marginal EF
March 2024 — Hourly Displacement Detail (discharge)
Rows = discharge hours (CLT); cells coloured by tCO₂ displaced; hover shows per-tech MWh → tCO₂ breakdown
March 2024 — RED = 8,107 tCO₂
TGHGd = 8,107 tCO₂
March — Effective Discharge by Technology
% of MWh actually displaced by the BESS (sums to Bd)
March — Top 15 Displaced Units
by tCO₂ displaced by Bd (effective DORd only)
March — Most Frequent Marginal Units
Discharge — sets the marginal EF
April 2024 — Hourly Displacement Detail (discharge)
Rows = discharge hours (CLT); cells coloured by tCO₂ displaced; hover shows per-tech MWh → tCO₂ breakdown
April 2024 — RED = 7,259 tCO₂
TGHGd = 7,259 tCO₂
April — Effective Discharge by Technology
% of MWh actually displaced by the BESS (sums to Bd)
April — Top 15 Displaced Units
by tCO₂ displaced by Bd (effective DORd only)
April — Most Frequent Marginal Units
Discharge — sets the marginal EF
May 2024 — Hourly Displacement Detail (discharge)
Rows = discharge hours (CLT); cells coloured by tCO₂ displaced; hover shows per-tech MWh → tCO₂ breakdown
May 2024 — RED = 8,669 tCO₂
TGHGd = 8,669 tCO₂
May — Effective Discharge by Technology
% of MWh actually displaced by the BESS (sums to Bd)
May — Top 15 Displaced Units
by tCO₂ displaced by Bd (effective DORd only)
May — Most Frequent Marginal Units
Discharge — sets the marginal EF
June 2024 — Hourly Displacement Detail (discharge)
Rows = discharge hours (CLT); cells coloured by tCO₂ displaced; hover shows per-tech MWh → tCO₂ breakdown
June 2024 — RED = 8,709 tCO₂
TGHGd = 8,709 tCO₂
June — Effective Discharge by Technology
% of MWh actually displaced by the BESS (sums to Bd)
June — Top 15 Displaced Units
by tCO₂ displaced by Bd (effective DORd only)
June — Most Frequent Marginal Units
Discharge — sets the marginal EF
July 2024 — Hourly Displacement Detail (discharge)
Rows = discharge hours (CLT); cells coloured by tCO₂ displaced; hover shows per-tech MWh → tCO₂ breakdown
July 2024 — RED = 10,155 tCO₂
TGHGd = 10,155 tCO₂
July — Effective Discharge by Technology
% of MWh actually displaced by the BESS (sums to Bd)
July — Top 15 Displaced Units
by tCO₂ displaced by Bd (effective DORd only)
July — Most Frequent Marginal Units
Discharge — sets the marginal EF
August 2024 — Hourly Displacement Detail (discharge)
Rows = discharge hours (CLT); cells coloured by tCO₂ displaced; hover shows per-tech MWh → tCO₂ breakdown
August 2024 — RED = 8,777 tCO₂
TGHGd = 8,777 tCO₂
August — Effective Discharge by Technology
% of MWh actually displaced by the BESS (sums to Bd)
August — Top 15 Displaced Units
by tCO₂ displaced by Bd (effective DORd only)
August — Most Frequent Marginal Units
Discharge — sets the marginal EF
September 2024 — Hourly Displacement Detail (discharge)
Rows = discharge hours (CLT); cells coloured by tCO₂ displaced; hover shows per-tech MWh → tCO₂ breakdown
September 2024 — RED = 5,624 tCO₂
TGHGd = 5,624 tCO₂
September — Effective Discharge by Technology
% of MWh actually displaced by the BESS (sums to Bd)
September — Top 15 Displaced Units
by tCO₂ displaced by Bd (effective DORd only)
September — Most Frequent Marginal Units
Discharge — sets the marginal EF
October 2024 — Hourly Displacement Detail (discharge)
Rows = discharge hours (CLT); cells coloured by tCO₂ displaced; hover shows per-tech MWh → tCO₂ breakdown
October 2024 — RED = 6,573 tCO₂
TGHGd = 6,573 tCO₂
October — Effective Discharge by Technology
% of MWh actually displaced by the BESS (sums to Bd)
October — Top 15 Displaced Units
by tCO₂ displaced by Bd (effective DORd only)
October — Most Frequent Marginal Units
Discharge — sets the marginal EF
November 2024 — Hourly Displacement Detail (discharge)
Rows = discharge hours (CLT); cells coloured by tCO₂ displaced; hover shows per-tech MWh → tCO₂ breakdown
November 2024 — RED = 5,070 tCO₂
TGHGd = 5,070 tCO₂
November — Effective Discharge by Technology
% of MWh actually displaced by the BESS (sums to Bd)
November — Top 15 Displaced Units
by tCO₂ displaced by Bd (effective DORd only)
November — Most Frequent Marginal Units
Discharge — sets the marginal EF
December 2024 — Hourly Displacement Detail (discharge)
Rows = discharge hours (CLT); cells coloured by tCO₂ displaced; hover shows per-tech MWh → tCO₂ breakdown
December 2024 — RED = 5,961 tCO₂
TGHGd = 5,961 tCO₂
December — Effective Discharge by Technology
% of MWh actually displaced by the BESS (sums to Bd)
December — Top 15 Displaced Units
by tCO₂ displaced by Bd (effective DORd only)
December — Most Frequent Marginal Units
Discharge — sets the marginal EF
Emission Factor 2025
0.4894
tCO₂ / MWh
RED 99,317 tCO₂ / 202,940 MWh discharged
Annual Summary — 2025
RED (tCO₂)
99,317
Net Emission Reduction
TGHGd (tCO₂)
99,317
Displaced by BESS
OSE (tCO₂)
18.8M
System Emissions
BESS (MWh)
139/150
Discharge / Charge per hour
Annual Emission Reduction Waterfall — 2025
tCO₂ — Full Year 2025
Average Marginal Discharge EF
tCO₂/MWh by month
Monthly RED
tCO₂ by month
Monthly Curtailment
MWh
Spot Price Distribution (hourly)
Box = IQR of hourly system averages; diamond = monthly median
Monthly Drill-Down
January 2025 — Hourly Displacement Detail (discharge)
Rows = discharge hours (CLT); cells coloured by tCO₂ displaced; hover shows per-tech MWh → tCO₂ breakdown
January 2025 — RED = 8,453 tCO₂
TGHGd = 8,453 tCO₂
January — Effective Discharge by Technology
% of MWh actually displaced by the BESS (sums to Bd)
January — Top 15 Displaced Units
by tCO₂ displaced by Bd (effective DORd only)
January — Most Frequent Marginal Units
Discharge — sets the marginal EF
February 2025 — Hourly Displacement Detail (discharge)
Rows = discharge hours (CLT); cells coloured by tCO₂ displaced; hover shows per-tech MWh → tCO₂ breakdown
February 2025 — RED = 7,156 tCO₂
TGHGd = 7,156 tCO₂
February — Effective Discharge by Technology
% of MWh actually displaced by the BESS (sums to Bd)
February — Top 15 Displaced Units
by tCO₂ displaced by Bd (effective DORd only)
February — Most Frequent Marginal Units
Discharge — sets the marginal EF
March 2025 — Hourly Displacement Detail (discharge)
Rows = discharge hours (CLT); cells coloured by tCO₂ displaced; hover shows per-tech MWh → tCO₂ breakdown
March 2025 — RED = 9,821 tCO₂
TGHGd = 9,821 tCO₂
March — Effective Discharge by Technology
% of MWh actually displaced by the BESS (sums to Bd)
March — Top 15 Displaced Units
by tCO₂ displaced by Bd (effective DORd only)
March — Most Frequent Marginal Units
Discharge — sets the marginal EF
April 2025 — Hourly Displacement Detail (discharge)
Rows = discharge hours (CLT); cells coloured by tCO₂ displaced; hover shows per-tech MWh → tCO₂ breakdown
April 2025 — RED = 10,803 tCO₂
TGHGd = 10,803 tCO₂
April — Effective Discharge by Technology
% of MWh actually displaced by the BESS (sums to Bd)
April — Top 15 Displaced Units
by tCO₂ displaced by Bd (effective DORd only)
April — Most Frequent Marginal Units
Discharge — sets the marginal EF
May 2025 — Hourly Displacement Detail (discharge)
Rows = discharge hours (CLT); cells coloured by tCO₂ displaced; hover shows per-tech MWh → tCO₂ breakdown
May 2025 — RED = 10,001 tCO₂
TGHGd = 10,001 tCO₂
May — Effective Discharge by Technology
% of MWh actually displaced by the BESS (sums to Bd)
May — Top 15 Displaced Units
by tCO₂ displaced by Bd (effective DORd only)
May — Most Frequent Marginal Units
Discharge — sets the marginal EF
June 2025 — Hourly Displacement Detail (discharge)
Rows = discharge hours (CLT); cells coloured by tCO₂ displaced; hover shows per-tech MWh → tCO₂ breakdown
June 2025 — RED = 8,681 tCO₂
TGHGd = 8,681 tCO₂
June — Effective Discharge by Technology
% of MWh actually displaced by the BESS (sums to Bd)
June — Top 15 Displaced Units
by tCO₂ displaced by Bd (effective DORd only)
June — Most Frequent Marginal Units
Discharge — sets the marginal EF
July 2025 — Hourly Displacement Detail (discharge)
Rows = discharge hours (CLT); cells coloured by tCO₂ displaced; hover shows per-tech MWh → tCO₂ breakdown
July 2025 — RED = 8,645 tCO₂
TGHGd = 8,645 tCO₂
July — Effective Discharge by Technology
% of MWh actually displaced by the BESS (sums to Bd)
July — Top 15 Displaced Units
by tCO₂ displaced by Bd (effective DORd only)
July — Most Frequent Marginal Units
Discharge — sets the marginal EF
August 2025 — Hourly Displacement Detail (discharge)
Rows = discharge hours (CLT); cells coloured by tCO₂ displaced; hover shows per-tech MWh → tCO₂ breakdown
August 2025 — RED = 7,553 tCO₂
TGHGd = 7,553 tCO₂
August — Effective Discharge by Technology
% of MWh actually displaced by the BESS (sums to Bd)
August — Top 15 Displaced Units
by tCO₂ displaced by Bd (effective DORd only)
August — Most Frequent Marginal Units
Discharge — sets the marginal EF
September 2025 — Hourly Displacement Detail (discharge)
Rows = discharge hours (CLT); cells coloured by tCO₂ displaced; hover shows per-tech MWh → tCO₂ breakdown
September 2025 — RED = 6,231 tCO₂
TGHGd = 6,231 tCO₂
September — Effective Discharge by Technology
% of MWh actually displaced by the BESS (sums to Bd)
September — Top 15 Displaced Units
by tCO₂ displaced by Bd (effective DORd only)
September — Most Frequent Marginal Units
Discharge — sets the marginal EF
October 2025 — Hourly Displacement Detail (discharge)
Rows = discharge hours (CLT); cells coloured by tCO₂ displaced; hover shows per-tech MWh → tCO₂ breakdown
October 2025 — RED = 7,559 tCO₂
TGHGd = 7,559 tCO₂
October — Effective Discharge by Technology
% of MWh actually displaced by the BESS (sums to Bd)
October — Top 15 Displaced Units
by tCO₂ displaced by Bd (effective DORd only)
October — Most Frequent Marginal Units
Discharge — sets the marginal EF
November 2025 — Hourly Displacement Detail (discharge)
Rows = discharge hours (CLT); cells coloured by tCO₂ displaced; hover shows per-tech MWh → tCO₂ breakdown
November 2025 — RED = 7,478 tCO₂
TGHGd = 7,478 tCO₂
November — Effective Discharge by Technology
% of MWh actually displaced by the BESS (sums to Bd)
November — Top 15 Displaced Units
by tCO₂ displaced by Bd (effective DORd only)
November — Most Frequent Marginal Units
Discharge — sets the marginal EF
December 2025 — Hourly Displacement Detail (discharge)
Rows = discharge hours (CLT); cells coloured by tCO₂ displaced; hover shows per-tech MWh → tCO₂ breakdown
December 2025 — RED = 6,937 tCO₂
TGHGd = 6,937 tCO₂
December — Effective Discharge by Technology
% of MWh actually displaced by the BESS (sums to Bd)
December — Top 15 Displaced Units
by tCO₂ displaced by Bd (effective DORd only)
December — Most Frequent Marginal Units
Discharge — sets the marginal EF
Year-over-Year Comparison
Monthly RED — 2024 vs 2025
Net emission reductions by month
What changed: RED(2025) − RED(2024)
Bar = Δ TGHGd; line = net Δ RED. Hover for EFd detail.
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