diff --git a/ansible/roles/edge-host/defaults/main.yml b/ansible/roles/edge-host/defaults/main.yml
index 9813b3ce..3a778c01 100644
--- a/ansible/roles/edge-host/defaults/main.yml
+++ b/ansible/roles/edge-host/defaults/main.yml
@@ -31,14 +31,16 @@ edge_open3e_poll_seconds: 30
 # the commissioning workstation; see vican repo CLAUDE.md for the rationale).
 # NO -w / write DIDs here — live heating + battery, writes are Phase 3.
 edge_open3e_datapoints: >-
-  vitocal.268,vitocal.269,vitocal.271,vitocal.274,vitocal.286,vitocal.288,vitocal.318,vitocal.321,vitocal.324,vitocal.335,vitocal.336,vitocal.396,vitocal.402,vitocal.403,vitocal.548,vitocal.565,vitocal.1007,vitocal.1043,vitocal.1190,vitocal.1211,vitocal.1391,vitocal.1416,vitocal.1417,vitocal.2320,vitocal.2346,vitocal.2351,vitocal.2352,vitocal.2369,vitocal.2370,vitocal.2622,vitocal.2624,vitocal.2625,vitocal.2735,vitocal.3016,vx3.378,vx3.379,vx3.380,vx3.535,vx3.1603,vx3.1664,vx3.1690,vx3.1801,vx3.1802,vx3.1810,vx3.1828,vx3.1830,vx3.1834,vx3.1836,vx3.2214,vx3.2240,vcmu.320,vcmu.322,vcmu.325,vcmu.355,vcmu.389,vcmu.391,vcmu.1772,vcmu.1773,vcmu.1775,vcmu.1776,vcmu.2256,vcmu.2259,vcmu.2333,vcmu.2334,vcmu.2569,vcmu.2571,vitocal.2791
+  vitocal.268,vitocal.269,vitocal.271,vitocal.274,vitocal.286,vitocal.288,vitocal.318,vitocal.321,vitocal.324,vitocal.335,vitocal.336,vitocal.396,vitocal.402,vitocal.403,vitocal.548,vitocal.565,vitocal.1007,vitocal.1043,vitocal.1190,vitocal.1211,vitocal.1391,vitocal.1416,vitocal.1417,vitocal.2320,vitocal.2346,vitocal.2351,vitocal.2352,vitocal.2369,vitocal.2370,vitocal.2486,vitocal.2487,vitocal.2488,vitocal.2622,vitocal.2624,vitocal.2625,vitocal.2735,vitocal.3016,vx3.378,vx3.379,vx3.380,vx3.535,vx3.1603,vx3.1664,vx3.1690,vx3.1801,vx3.1802,vx3.1810,vx3.1828,vx3.1830,vx3.1577,vx3.1578,vx3.1579,vx3.1580,vx3.1581,vx3.1582,vx3.1834,vx3.1836,vx3.2214,vx3.2240,vx3.3085,vx3.3086,vx3.3087,vx3.3088,vx3.3089,vx3.3090,vcmu.320,vcmu.322,vcmu.325,vcmu.355,vcmu.389,vcmu.391,vcmu.1772,vcmu.1773,vcmu.1775,vcmu.1776,vcmu.2256,vcmu.2259,vcmu.2333,vcmu.2334,vcmu.2569,vcmu.2571,vitocal.2791
 # ECU addresses; -dev selects codec set, tx selects the UDS address.
 # vcmu (refrigerant-circuit controller) has no dedicated codec set —
 # omitting dpList makes open3e fall back to the generic datapoint list,
 # which decodes all polled VCMU DIDs.
 edge_open3e_devices:
   vitocal: { tx: "0x680", dpList: "vcal" }
-  vx3: { tx: "0x6a1", dpList: "vx3" }
+  # dpList als Pfad: Overlay-Datei mit den Batteriemodul-DIDs (siehe
+  # files/open3e-vx3plus.py) — die Stock-vx3-Liste filtert sie sonst weg.
+  vx3: { tx: "0x6a1", dpList: "/opt/edge-host/open3e/vx3plus.py" }
   vcmu: { tx: "0x68c" }
 
 # --- E3onCAN: passive E380 energy-meter listener (no bus writes, so it
diff --git a/ansible/roles/edge-host/files/open3e-vx3plus.py b/ansible/roles/edge-host/files/open3e-vx3plus.py
new file mode 100644
index 00000000..d4836a60
--- /dev/null
+++ b/ansible/roles/edge-host/files/open3e-vx3plus.py
@@ -0,0 +1,20 @@
+# Managed by ansible (roles/edge-host). Datapoint overlay for the VX3:
+# the stock vx3 list acts as a FILTER (DIDs missing from it are popped
+# from the master table, Open3Eclass.py), so the per-battery-module DIDs
+# were never pollable with dpList "vx3". This overlay re-adds them with
+# codec None (= keep the master/general codec, RawCodec hex strings).
+#
+# Module DIDs (verified answering on ECU 0x6a1, 2026-07-03):
+#   1577-1582  ElectricalEnergyStorageModule{One..Six}OperatingData
+#              (139 B: 8x temperature 0.1 °C + 15x cell voltage mV)
+#   3085-3090  ElectricalEnergyStorageModule{One..Six}Information
+#              (18 B: module voltage 0.01 V, SoH?, counters)
+from open3e.Open3EdatapointsVx3 import dataIdentifiers as _vx3
+
+dataIdentifiers = {
+    "dids": {
+        **_vx3["dids"],
+        1577: None, 1578: None, 1579: None, 1580: None, 1581: None, 1582: None,
+        3085: None, 3086: None, 3087: None, 3088: None, 3089: None, 3090: None,
+    }
+}
diff --git a/ansible/roles/edge-host/tasks/main.yml b/ansible/roles/edge-host/tasks/main.yml
index 12b98b84..81c19096 100644
--- a/ansible/roles/edge-host/tasks/main.yml
+++ b/ansible/roles/edge-host/tasks/main.yml
@@ -124,6 +124,13 @@
     virtualenv_command: python -m venv
   notify: Restart open3e
 
+- name: Deploy open3e vx3 datapoint overlay (battery-module DIDs)
+  ansible.builtin.copy:
+    src: open3e-vx3plus.py
+    dest: "{{ edge_base_dir }}/open3e/vx3plus.py"
+    mode: "0644"
+  notify: Restart open3e
+
 - name: Deploy open3e devices.json
   ansible.builtin.copy:
     content: "{{ edge_open3e_devices | to_nice_json }}\n"