PyPSA · euronion · May 21, 2026 · May 13, 2026 · May 13, 2026 · May 13, 2026
diff --git a/docs/release_notes.rst b/docs/release_notes.rst
@@ -1,7 +1,7 @@
 
 ..
   SPDX-FileCopyrightText: Contributors to technology-data <https://github.com/pypsa/technology-data>
-
+iiasdfI
   SPDX-License-Identifier: GPL-3.0-only
 
 ##########################################
@@ -19,7 +19,9 @@ Upcoming Release
 * Breaking changes: 
   - Renamed "electricity grid connection" to "distribution grid reinforcement" and updated description for more clarity on the technology and consistency with the source.
 
-* Add missing discount rate for OCGT in US-specific data. (https://github.com/PyPSA/technology-data/pull/269)
+ii* Add missing discount rate for OCGT in US-specific data. (https://github.com/PyPSA/technology-data/pull/269)
+
+* The "currency_year" column will now reflect the inflation adjusted currency year instead of the original currency year of the input data. (https://github.com/PyPSA/technology-data/pull/275)
 
 `v0.14.0 <https://github.com/PyPSA/technology-data/releases/tag/v0.14.0>`__ (13th February 2026)
 ================================================================================================

diff --git a/outputs/US/costs_2020.csv b/outputs/US/costs_2020.csv
diff --git a/outputs/US/costs_2025.csv b/outputs/US/costs_2025.csv
diff --git a/outputs/US/costs_2030.csv b/outputs/US/costs_2030.csv
diff --git a/outputs/US/costs_2035.csv b/outputs/US/costs_2035.csv
diff --git a/outputs/US/costs_2040.csv b/outputs/US/costs_2040.csv
diff --git a/outputs/US/costs_2045.csv b/outputs/US/costs_2045.csv
diff --git a/outputs/US/costs_2050.csv b/outputs/US/costs_2050.csv
diff --git a/outputs/costs_2020.csv b/outputs/costs_2020.csv
diff --git a/outputs/costs_2025.csv b/outputs/costs_2025.csv
diff --git a/outputs/costs_2030.csv b/outputs/costs_2030.csv
diff --git a/outputs/costs_2035.csv b/outputs/costs_2035.csv
diff --git a/outputs/costs_2040.csv b/outputs/costs_2040.csv
diff --git a/outputs/costs_2045.csv b/outputs/costs_2045.csv
diff --git a/outputs/costs_2050.csv b/outputs/costs_2050.csv
diff --git a/scripts/_helpers.py b/scripts/_helpers.py
@@ -303,6 +303,9 @@ def get_factor(inflation_rate_df, ref_year, eur_year_val):
         inflation.loc[filter_i], axis=0
     )
 
+    # Modify the currency year to the reference year for the inflation adjustment
+    costs.loc[filter_i, "currency_year"] = eur_year
+
     return costs