diff --git a/webapp/public/locales/en/main.json b/webapp/public/locales/en/main.json
index 301892f48d..0cb501b26b 100644
--- a/webapp/public/locales/en/main.json
+++ b/webapp/public/locales/en/main.json
@@ -639,6 +639,8 @@
   "study.modeling.renewables.select": "Renewable",
   "study.modeling.renewables.parameters": "Parameters",
   "study.modeling.reserves": "Reserves",
+  "study.modeling.reserves.error.optimizationConfig": "Unable to retrieve the reserves configuration",
+  "study.modeling.reserves.readOnly.alert": "Reserves are read-only. Enable them in the optimization configuration to edit.",
   "study.modeling.reserves.needs": "Needs",
   "study.modeling.reserves.needs.select": "Reserve",
   "study.modeling.reserves.needs.empty": "Create a reserve to define its needs",
diff --git a/webapp/public/locales/fr/main.json b/webapp/public/locales/fr/main.json
index ef283e9973..f8e78eb6df 100644
--- a/webapp/public/locales/fr/main.json
+++ b/webapp/public/locales/fr/main.json
@@ -639,6 +639,8 @@
   "study.modeling.renewables.select": "Renouvelable",
   "study.modeling.renewables.parameters": "Paramètres",
   "study.modeling.reserves": "Réserves",
+  "study.modeling.reserves.error.optimizationConfig": "Impossible de récupérer la configuration des réserves",
+  "study.modeling.reserves.readOnly.alert": "Les réserves sont en lecture seule. Pour les modifier, activez-les dans la configuration d'optimisation.",
   "study.modeling.reserves.needs": "Besoins",
   "study.modeling.reserves.needs.select": "Réserve",
   "study.modeling.reserves.needs.empty": "Créez une réserve pour définir ses besoins",
diff --git a/webapp/src/components/GroupedDataTable/index.tsx b/webapp/src/components/GroupedDataTable/index.tsx
index 1e04c4310b..06d99317b2 100644
--- a/webapp/src/components/GroupedDataTable/index.tsx
+++ b/webapp/src/components/GroupedDataTable/index.tsx
@@ -72,6 +72,7 @@ export interface GroupedDataTableProps<
   onNameClick?: (row: TData) => void;
   nameLinkOptions?: (row: TData) => ToOptions;
   onDataChange?: (data: TData[]) => void;
+  readOnly?: boolean;
   isLoading?: boolean;
   deleteConfirmationMessage?: string | ((rows: TData[]) => string);
   fillPendingRow?: (
@@ -97,6 +98,7 @@ function GroupedDataTable<TGroups extends string[], TData extends RowData<TGroup
   onNameClick,
   nameLinkOptions,
   onDataChange,
+  readOnly = false,
   isLoading,
   deleteConfirmationMessage,
   fillPendingRow,
@@ -106,7 +108,7 @@ function GroupedDataTable<TGroups extends string[], TData extends RowData<TGroup
   const [tableData, setTableData] = useState(data);
   const [rowSelection, setRowSelection] = useState<MRT_RowSelectionState>({});
   const enqueueErrorSnackbar = useEnqueueErrorSnackbar();
-  const callbacksRef = useUpdatedRef({ onNameClick, nameLinkOptions });
+  const callbacksRef = useUpdatedRef({ onNameClick, nameLinkOptions, readOnly });
   const pendingRows = useRef<Array<RowData<TGroups[number]>>>([]);
   const { createOps, deleteOps, totalOps } = useOperationInProgressCount();
   const { isDarkMode } = useThemeColorScheme();
@@ -140,9 +142,9 @@ function GroupedDataTable<TGroups extends string[], TData extends RowData<TGroup
         filterVariant: "autocomplete",
         filterSelectOptions: existingNames,
         Cell: ({ renderedCellValue, row }) => {
-          const { onNameClick, nameLinkOptions } = callbacksRef.current;
+          const { onNameClick, nameLinkOptions, readOnly } = callbacksRef.current;
 
-          if (isPendingRow(row.original)) {
+          if (isPendingRow(row.original) || readOnly) {
             return renderedCellValue;
           }
 
@@ -219,6 +221,10 @@ function GroupedDataTable<TGroups extends string[], TData extends RowData<TGroup
     positionToolbarAlertBanner: "none",
     // Rows
     muiTableBodyRowProps: ({ row }) => {
+      if (readOnly) {
+        return {};
+      }
+
       const isPending = isPendingRow(row.original);
 
       return {
@@ -254,6 +260,7 @@ function GroupedDataTable<TGroups extends string[], TData extends RowData<TGroup
             startIcon={<AddCircleOutlineIcon />}
             variant="contained"
             onClick={() => setOpenDialog("add")}
+            disabled={readOnly}
           >
             {t("button.add")}
           </Button>
@@ -263,7 +270,7 @@ function GroupedDataTable<TGroups extends string[], TData extends RowData<TGroup
             startIcon={<ContentCopyIcon />}
             variant="outlined"
             onClick={() => setOpenDialog("duplicate")}
-            disabled={table.getSelectedRowModel().rows.length !== 1}
+            disabled={readOnly || table.getSelectedRowModel().rows.length !== 1}
           >
             {t("global.duplicate")}
           </Button>
@@ -274,7 +281,7 @@ function GroupedDataTable<TGroups extends string[], TData extends RowData<TGroup
             color="error"
             variant="outlined"
             onClick={() => setOpenDialog("delete")}
-            disabled={table.getSelectedRowModel().rows.length === 0}
+            disabled={readOnly || table.getSelectedRowModel().rows.length === 0}
           >
             {t("global.delete")}
           </Button>
diff --git a/webapp/src/routes/_authenticated/studies/$studyId/explore/modeling/areas/$areaId/reserves/general.tsx b/webapp/src/routes/_authenticated/studies/$studyId/explore/modeling/areas/$areaId/reserves/general.tsx
index 1c2dbcfc1a..abe60022ef 100644
--- a/webapp/src/routes/_authenticated/studies/$studyId/explore/modeling/areas/$areaId/reserves/general.tsx
+++ b/webapp/src/routes/_authenticated/studies/$studyId/explore/modeling/areas/$areaId/reserves/general.tsx
@@ -14,10 +14,12 @@
 
 import GroupedDataTable from "@/components/GroupedDataTable";
 import type { RowData } from "@/components/GroupedDataTable/types";
+import usePromiseWithSnackbarError from "@/hooks/usePromiseWithSnackbarError";
 import { reserveMutations } from "@/queries/reserves/mutations";
 import { reserveQueries } from "@/queries/reserves/queries";
 import type { Reserve } from "@/services/api/studies/areas/reserves/types";
-import { Chip } from "@mui/material";
+import { getOptimization } from "@/services/api/studies/config/optimization";
+import { Alert, Chip } from "@mui/material";
 import { useMutation, useQueryClient, useSuspenseQuery } from "@tanstack/react-query";
 import { createFileRoute } from "@tanstack/react-router";
 import { createMRTColumnHelper } from "material-react-table";
@@ -74,6 +76,16 @@ function ReservesGeneral() {
   const { studyId, areaId } = Route.useParams();
   const queryClient = useQueryClient();
 
+  // Reserves are editable only when enabled in the optimization configuration
+  // ("includeReserves"). Otherwise the table is shown in read-only mode.
+  const { data: showReserves, isLoading } = usePromiseWithSnackbarError(
+    () => getOptimization({ studyId }).then((o) => o.includeReserves),
+    {
+      errorMessage: t("study.modeling.reserves.error.optimizationConfig"),
+      deps: [studyId],
+    },
+  );
+
   const { queryKey: listQueryKey } = reserveQueries.list(studyId, areaId);
 
   const { data: rows } = useSuspenseQuery({
@@ -140,27 +152,36 @@ function ReservesGeneral() {
   ////////////////////////////////////////////////////////////////
 
   return (
-    <GroupedDataTable
-      key={`${studyId}-${areaId}`}
-      data={rows}
-      columns={columns}
-      onCreate={handleCreate}
-      renderCreateDialog={({ open, onClose, onSubmit, existingNames }) => (
-        <CreateReserveDialog
-          open={open}
-          onClose={onClose}
-          onSubmit={onSubmit}
-          existingNames={existingNames}
-        />
+    <>
+      {showReserves === false && (
+        <Alert severity="warning" sx={{ mb: 1 }}>
+          {t("study.modeling.reserves.readOnly.alert")}
+        </Alert>
       )}
-      onDuplicate={handleDuplicate}
-      onDelete={handleDelete}
-      deleteConfirmationMessage={(rowsToDelete) =>
-        t("study.modeling.reserves.question.delete", {
-          count: rowsToDelete.length,
-          reserveNames: rowsToDelete.map((row) => row.name),
-        })
-      }
-    />
+      <GroupedDataTable
+        key={`${studyId}-${areaId}`}
+        data={rows}
+        columns={columns}
+        readOnly={!showReserves}
+        isLoading={isLoading}
+        onCreate={handleCreate}
+        renderCreateDialog={({ open, onClose, onSubmit, existingNames }) => (
+          <CreateReserveDialog
+            open={open}
+            onClose={onClose}
+            onSubmit={onSubmit}
+            existingNames={existingNames}
+          />
+        )}
+        onDuplicate={handleDuplicate}
+        onDelete={handleDelete}
+        deleteConfirmationMessage={(rowsToDelete) =>
+          t("study.modeling.reserves.question.delete", {
+            count: rowsToDelete.length,
+            reserveNames: rowsToDelete.map((row) => row.name),
+          })
+        }
+      />
+    </>
   );
 }
diff --git a/webapp/src/routes/_authenticated/studies/$studyId/explore/modeling/areas/$areaId/route.tsx b/webapp/src/routes/_authenticated/studies/$studyId/explore/modeling/areas/$areaId/route.tsx
index 9cc860372a..5bcb456e24 100644
--- a/webapp/src/routes/_authenticated/studies/$studyId/explore/modeling/areas/$areaId/route.tsx
+++ b/webapp/src/routes/_authenticated/studies/$studyId/explore/modeling/areas/$areaId/route.tsx
@@ -14,10 +14,8 @@
 
 import TabsView from "@/components/page/TabsView";
 import ViewWrapper from "@/components/page/ViewWrapper";
-import usePromise from "@/hooks/usePromise";
 import useAppSelector from "@/redux/hooks/useAppSelector";
 import { getStudySynthesis } from "@/redux/selectors";
-import { getOptimization } from "@/services/api/studies/config/optimization";
 import useStudy from "@/routes/_authenticated/studies/$studyId/-hooks/useStudy";
 import useArea from "@/routes/_authenticated/studies/$studyId/explore/modeling/areas/$areaId/-hooks/useArea";
 import { createFileRoute, linkOptions } from "@tanstack/react-router";
@@ -42,13 +40,6 @@ function AreaLayout() {
   // editable in "/studies/$studyId/explore/configuration/advanced-params"
   const enrModelling = useAppSelector((state) => getStudySynthesis(state, study.id)?.enr_modelling);
 
-  // The reserves tab is only shown when reserves are enabled in the
-  // optimization configuration ("includeReserves").
-  const { data: showReserves } = usePromise(
-    () => getOptimization({ studyId: study.id }).then((o) => o.includeReserves),
-    [study.id],
-  );
-
   return (
     <ViewWrapper>
       <TabsView
@@ -118,15 +109,14 @@ function AreaLayout() {
               params,
             }),
           },
-          semver.gte(study.version, "10.0.0") &&
-            showReserves && {
-              id: "reserves",
-              label: t("study.modeling.reserves"),
-              linkOptions: linkOptions({
-                to: "/studies/$studyId/explore/modeling/areas/$areaId/reserves",
-                params,
-              }),
-            },
+          semver.gte(study.version, "10.0.0") && {
+            id: "reserves",
+            label: t("study.modeling.reserves"),
+            linkOptions: linkOptions({
+              to: "/studies/$studyId/explore/modeling/areas/$areaId/reserves",
+              params,
+            }),
+          },
           {
             id: "miscGen",
             label: t("study.modeling.miscGen"),