diff --git a/antarest/study/storage/rawstudy/model/filesystem/root/input/hydro/common/capacity/capacity.py b/antarest/study/storage/rawstudy/model/filesystem/root/input/hydro/common/capacity/capacity.py
index b671c20d38..5d14550a39 100644
--- a/antarest/study/storage/rawstudy/model/filesystem/root/input/hydro/common/capacity/capacity.py
+++ b/antarest/study/storage/rawstudy/model/filesystem/root/input/hydro/common/capacity/capacity.py
@@ -22,7 +22,7 @@ class MatrixInfo(TypedDict, total=False):
 MATRICES_INFO: List[MatrixInfo] = [
     {
         "name": "maxpower",
-        "freq": MatrixFrequency.HOURLY,
+        "freq": MatrixFrequency.DAILY,
         "start_version": 0,
     },
     {
diff --git a/tests/storage/repository/filesystem/root/input/hydro/common/capacity/test_capacity.py b/tests/storage/repository/filesystem/root/input/hydro/common/capacity/test_capacity.py
index 03599c4628..4a32f76897 100644
--- a/tests/storage/repository/filesystem/root/input/hydro/common/capacity/test_capacity.py
+++ b/tests/storage/repository/filesystem/root/input/hydro/common/capacity/test_capacity.py
@@ -25,8 +25,8 @@
 # noinspection SpellCheckingInspection
 BEFORE_650 = {
     # fmt: off
-    "maxpower_en": {"default_empty": [[]], "freq": MatrixFrequency.HOURLY, "nb_columns": None},
-    "maxpower_fr": {"default_empty": [[]], "freq": MatrixFrequency.HOURLY, "nb_columns": None},
+    "maxpower_en": {"default_empty": [[]], "freq": MatrixFrequency.DAILY, "nb_columns": None},
+    "maxpower_fr": {"default_empty": [[]], "freq": MatrixFrequency.DAILY, "nb_columns": None},
     "reservoir_en": {"default_empty": [[]], "freq": MatrixFrequency.DAILY, "nb_columns": None},
     "reservoir_fr": {"default_empty": [[]], "freq": MatrixFrequency.DAILY, "nb_columns": None},
     # fmt: on
@@ -39,8 +39,8 @@
     "creditmodulations_fr": {"default_empty": [[]], "freq": MatrixFrequency.HOURLY, "nb_columns": None},
     "inflowPattern_en": {"default_empty": [[]], "freq": MatrixFrequency.HOURLY, "nb_columns": None},
     "inflowPattern_fr": {"default_empty": [[]], "freq": MatrixFrequency.HOURLY, "nb_columns": None},
-    "maxpower_en": {"default_empty": [[]], "freq": MatrixFrequency.HOURLY, "nb_columns": None},
-    "maxpower_fr": {"default_empty": [[]], "freq": MatrixFrequency.HOURLY, "nb_columns": None},
+    "maxpower_en": {"default_empty": [[]], "freq": MatrixFrequency.DAILY, "nb_columns": None},
+    "maxpower_fr": {"default_empty": [[]], "freq": MatrixFrequency.DAILY, "nb_columns": None},
     "reservoir_en": {"default_empty": [[]], "freq": MatrixFrequency.DAILY, "nb_columns": None},
     "reservoir_fr": {"default_empty": [[]], "freq": MatrixFrequency.DAILY, "nb_columns": None},
     "waterValues_en": {"default_empty": [[]], "freq": MatrixFrequency.DAILY, "nb_columns": None},