diff --git a/infra/grafana/garage_decke.json b/infra/grafana/garage_decke.json
index dae52088b..ea7aaf765 100644
--- a/infra/grafana/garage_decke.json
+++ b/infra/grafana/garage_decke.json
@@ -84,7 +84,7 @@
     {
       "id": 2,
       "type": "stat",
-      "title": "Reserve",
+      "title": "PWT oben",
       "gridPos": {
         "h": 4,
         "w": 4,
@@ -412,7 +412,7 @@
           "rawQuery": true
         },
         {
-          "refId": "reserve",
+          "refId": "pwt",
           "datasource": {
             "type": "influxdb",
             "uid": "ffptl25vzylfke"
diff --git a/infra/telegraf/README.md b/infra/telegraf/README.md
index d022cb901..0950bf5c8 100644
--- a/infra/telegraf/README.md
+++ b/infra/telegraf/README.md
@@ -81,7 +81,7 @@ Garage-Deckentemperaturen: 5x DS18B20 an 2x Shelly 1 (Gen1) → DB `sensors`, Me
 | Tag | Bedeutung |
 |-----|-----------|
 | `node` | `garage_decke` (**nicht** `garage` — das ist der Raum-Satellit) |
-| `sensor` | `rl_klimadecke`, `vl_kaeltedecke`, `vl_brunnen`, `rl_brunnen`, `reserve` |
+| `sensor` | `rl_klimadecke`, `vl_kaeltedecke`, `vl_brunnen`, `rl_brunnen`, `pwt` |
 
 MQTT-Topics (Shelly Gen1, plain float °C):
 
diff --git a/infra/telegraf/satellites.conf b/infra/telegraf/satellites.conf
index f132c8787..9a0d3b3d0 100644
--- a/infra/telegraf/satellites.conf
+++ b/infra/telegraf/satellites.conf
@@ -89,7 +89,7 @@
 # --- Garage-Decke: 5x DS18B20 ueber 2 Shelly 1 (Gen1), MQTT ---
 # Sensor-Zuordnung final (26.06.2026, User-identifiziert):
 #   rl_klimadecke  = shelly .86 idx0 hwID 28ff641e01be641a  (RL Klimadecke)
-#   reserve        = shelly .86 idx1 hwID 28ff641e01b534e2  (Reserve)
+#   pwt            = shelly .86 idx1 hwID 28ff641e01b534e2  (PWT oben geklemmt)
 #   vl_kaeltedecke = shelly .86 idx2 hwID 28ff641e23c9d2f6  (VL KaelteDecke)
 #   vl_brunnen     = shelly .78 idx0 hwID 28ff641e23ea0235  (VL Brunnen vor PWT)
 #   rl_brunnen     = shelly .78 idx1 hwID 28ff641e23f7232d  (RL Brunnen nach PWT)
@@ -112,7 +112,7 @@
   topic_tag = ""
   [inputs.mqtt_consumer.tags]
     node = "garage_decke"
-    sensor = "reserve"
+    sensor = "pwt"
 [[inputs.mqtt_consumer]]
   servers = ["tcp://127.0.0.1:1883"]
   topics = ["shellies/shelly1-F4CFA2D3B444/ext_temperature/2"]