diff --git a/data/grid5000/sites/grenoble/clusters/troll/nodes/troll-1.json b/data/grid5000/sites/grenoble/clusters/troll/nodes/troll-1.json
index b687989eea3bfe2181b64141b59f884e0a772a1c..d5e5f7bbd295b255aef5dc0409fa3498bb43e633 100644
--- a/data/grid5000/sites/grenoble/clusters/troll/nodes/troll-1.json
+++ b/data/grid5000/sites/grenoble/clusters/troll/nodes/troll-1.json
@@ -42,7 +42,7 @@
     "ram_size": 2061584302080
   },
   "monitoring": {
-    "wattmeter": "false"
+    "wattmeter": "true"
   },
   "network_adapters": [
     {
@@ -124,6 +124,24 @@
     "version": "Gold 5218"
   },
   "sensors": {
+    "power": {
+      "available": true,
+      "per_outlets": true,
+      "via": {
+        "api": {
+          "metric": "power"
+        },
+        "pdu": [
+          {
+            "port": 3,
+            "uid": "wattmetre9"
+          }
+        ],
+        "www": {
+          "url": "http://wattmetre.grenoble.grid5000.fr/GetWatts-json.php"
+        }
+      }
+    }
   },
   "storage_devices": [
     {
diff --git a/data/grid5000/sites/grenoble/clusters/troll/nodes/troll-2.json b/data/grid5000/sites/grenoble/clusters/troll/nodes/troll-2.json
index f4db37db869b024025cadb600d80c63889402211..f3584fabd394d25176ffdadbb5a33aefbe66980a 100644
--- a/data/grid5000/sites/grenoble/clusters/troll/nodes/troll-2.json
+++ b/data/grid5000/sites/grenoble/clusters/troll/nodes/troll-2.json
@@ -42,7 +42,7 @@
     "ram_size": 2061584302080
   },
   "monitoring": {
-    "wattmeter": "false"
+    "wattmeter": "true"
   },
   "network_adapters": [
     {
@@ -124,6 +124,24 @@
     "version": "Gold 5218"
   },
   "sensors": {
+    "power": {
+      "available": true,
+      "per_outlets": true,
+      "via": {
+        "api": {
+          "metric": "power"
+        },
+        "pdu": [
+          {
+            "port": 4,
+            "uid": "wattmetre10"
+          }
+        ],
+        "www": {
+          "url": "http://wattmetre.grenoble.grid5000.fr/GetWatts-json.php"
+        }
+      }
+    }
   },
   "storage_devices": [
     {
diff --git a/data/grid5000/sites/grenoble/clusters/troll/nodes/troll-3.json b/data/grid5000/sites/grenoble/clusters/troll/nodes/troll-3.json
index aa9c780dfdc29f2b3c307ce670b891df366dcdab..60d8f2918f82991dc5a50d936989e4238dc3038a 100644
--- a/data/grid5000/sites/grenoble/clusters/troll/nodes/troll-3.json
+++ b/data/grid5000/sites/grenoble/clusters/troll/nodes/troll-3.json
@@ -42,7 +42,7 @@
     "ram_size": 2061584302080
   },
   "monitoring": {
-    "wattmeter": "false"
+    "wattmeter": "true"
   },
   "network_adapters": [
     {
@@ -124,6 +124,24 @@
     "version": "Gold 5218"
   },
   "sensors": {
+    "power": {
+      "available": true,
+      "per_outlets": true,
+      "via": {
+        "api": {
+          "metric": "power"
+        },
+        "pdu": [
+          {
+            "port": 5,
+            "uid": "wattmetre11"
+          }
+        ],
+        "www": {
+          "url": "http://wattmetre.grenoble.grid5000.fr/GetWatts-json.php"
+        }
+      }
+    }
   },
   "storage_devices": [
     {
diff --git a/data/grid5000/sites/grenoble/clusters/troll/nodes/troll-4.json b/data/grid5000/sites/grenoble/clusters/troll/nodes/troll-4.json
index 4b980c02058deb37cbeb40b16a1246c24bd420dd..3e22b5d7e2acc71aaea949d2fa6b9698c6f393f6 100644
--- a/data/grid5000/sites/grenoble/clusters/troll/nodes/troll-4.json
+++ b/data/grid5000/sites/grenoble/clusters/troll/nodes/troll-4.json
@@ -42,7 +42,7 @@
     "ram_size": 2061584302080
   },
   "monitoring": {
-    "wattmeter": "false"
+    "wattmeter": "true"
   },
   "network_adapters": [
     {
@@ -124,6 +124,24 @@
     "version": "Gold 5218"
   },
   "sensors": {
+    "power": {
+      "available": true,
+      "per_outlets": true,
+      "via": {
+        "api": {
+          "metric": "power"
+        },
+        "pdu": [
+          {
+            "port": 6,
+            "uid": "wattmetre12"
+          }
+        ],
+        "www": {
+          "url": "http://wattmetre.grenoble.grid5000.fr/GetWatts-json.php"
+        }
+      }
+    }
   },
   "storage_devices": [
     {