diff --git a/src/WebApi_ws_live.cpp b/src/WebApi_ws_live.cpp
index e8848ae..2860d9c 100644
--- a/src/WebApi_ws_live.cpp
+++ b/src/WebApi_ws_live.cpp
@@ -85,7 +85,7 @@ void WebApiWsLiveClass::generateJsonResponse(JsonVariant& root)
         root[i][F("serial")] = String(buffer);
         root[i][F("name")] = inv->name();
         root[i][F("data_age")] = (millis() - inv->Statistics()->getLastUpdate()) / 1000;
-        root[i][F("age_critical")] = ((millis() - inv->Statistics()->getLastUpdate()) / 1000) > Configuration.get().Dtu_PollInterval * 5;
+        root[i][F("reachable")] = !inv->isReachable();
 
         // Loop all channels
         for (uint8_t c = 0; c <= inv->Statistics()->getChannelCount(); c++) {
diff --git a/webapp/src/components/HomeView.vue b/webapp/src/components/HomeView.vue
index dc3b830..3250395 100644
--- a/webapp/src/components/HomeView.vue
+++ b/webapp/src/components/HomeView.vue
@@ -31,8 +31,8 @@
                         <div class="card">
                             <div class="card-header text-white bg-primary d-flex justify-content-between align-items-center"
                                 :class="{
-                                    'bg-danger': inverter.age_critical,
-                                    'bg-primary': !inverter.age_critical,
+                                    'bg-danger': inverter.reachable,
+                                    'bg-primary': !inverter.reachable,
                                 }">
                                 {{ inverter.name }} (Inverter Serial Number:
                                 {{ inverter.serial }}) (Data Age:
@@ -240,7 +240,7 @@ import BootstrapAlert from '@/components/partials/BootstrapAlert.vue';
 declare interface Inverter {
     serial: number,
     name: string,
-    age_critical: boolean,
+    reachable: boolean,
     data_age: 0,
     events: 0
 }