diff --git a/haos-addon/config.yaml b/haos-addon/config.yaml
index 98b429a..0eedbfc 100644
--- a/haos-addon/config.yaml
+++ b/haos-addon/config.yaml
@@ -1,5 +1,5 @@
 name: ShineBridge
-version: "1.8.12"
+version: "1.8.13"
 slug: shinebridge
 description: Growatt Wechselrichter lokal in Home Assistant — Modbus TCP via ShineLAN-X, MQTT Discovery, Web UI
 url: https://gitea.bitfire.work/retr0/shinebridge
diff --git a/haos-addon/src/surplus_devices.py b/haos-addon/src/surplus_devices.py
index 01bf06f..d9353d6 100644
--- a/haos-addon/src/surplus_devices.py
+++ b/haos-addon/src/surplus_devices.py
@@ -36,12 +36,17 @@ class SurplusDeviceController:
             threshold = float(dev.get("threshold_w", 500))
             hysteresis = float(dev.get("hysteresis_w", 150))
             min_on_s = float(dev.get("min_on_minutes", 0)) * 60
+            inverted = bool(dev.get("inverted", False))
             currently_on = self._states.get(name, False)
 
-            if not currently_on and surplus_w >= threshold:
+            # Invertiert: EIN bei Netzbezug (kein Überschuss), AUS bei Überschuss
+            should_turn_on  = not currently_on and (surplus_w >= threshold if not inverted else surplus_w < (threshold - hysteresis))
+            should_turn_off = currently_on and (surplus_w < (threshold - hysteresis) if not inverted else surplus_w >= threshold)
+
+            if should_turn_on:
                 self._send(name, True)
                 self._on_since[name] = now
-            elif currently_on and surplus_w < (threshold - hysteresis):
+            elif should_turn_off:
                 on_since = self._on_since.get(name, 0.0)
                 if now - on_since >= min_on_s:
                     self._send(name, False)
diff --git a/haos-addon/src/web/index.html b/haos-addon/src/web/index.html
index 941acd1..0fbb321 100644
--- a/haos-addon/src/web/index.html
+++ b/haos-addon/src/web/index.html
@@ -988,19 +988,31 @@ async function importConfig(input) {
 
 let surplusDevices = [];
 
+function field(label, input) {
+  return `<div style="display:flex;flex-direction:column;gap:3px">
+    <span style="font-size:10px;color:var(--text-dim);text-transform:uppercase;letter-spacing:.05em;white-space:nowrap">${label}</span>
+    ${input}
+  </div>`;
+}
+
 function renderSurplusDeviceRow(dev) {
   const id = dev.id || ('sd_' + Math.random().toString(36).slice(2));
   return `<div class="surplus-device-row" data-id="${esc(id)}">
-    <div style="display:flex;gap:8px;flex-wrap:wrap;align-items:center">
-      <input type="text" placeholder="Name" style="flex:1;min-width:110px" value="${esc(dev.name||'')}" data-field="name">
-      <input type="text" placeholder="Z2M Friendly Name" list="z2m-device-list" style="flex:1;min-width:140px" value="${esc(dev.z2m_name||'')}" data-field="z2m_name">
-      <input type="number" placeholder="Ab (W)" title="Schwellwert" style="width:76px" value="${dev.threshold_w||500}" min="0" step="50" data-field="threshold_w">
-      <input type="number" placeholder="Hysterese (W)" title="Hysterese" style="width:90px" value="${dev.hysteresis_w||150}" min="0" step="50" data-field="hysteresis_w">
-      <input type="number" placeholder="Min. Laufzeit (min)" title="Mindest-Laufzeit in Minuten" style="width:110px" value="${dev.min_on_minutes||0}" min="0" step="5" data-field="min_on_minutes">
-      <label style="cursor:pointer;display:flex;align-items:center;gap:4px;font-size:12px;white-space:nowrap">
-        <input type="checkbox" ${dev.enabled!==false?'checked':''} data-field="enabled" style="width:auto;margin:0"> Aktiv
-      </label>
-      <button class="btn btn-secondary" style="padding:3px 8px;font-size:12px;flex-shrink:0" onclick="removeSurplusDevice(this)">✕</button>
+    <div style="display:flex;gap:8px;flex-wrap:wrap;align-items:flex-end">
+      ${field('Name', `<input type="text" placeholder="Heizstab Keller" style="width:130px" value="${esc(dev.name||'')}" data-field="name">`)}
+      ${field('Z2M Friendly Name', `<input type="text" placeholder="heizstab-keller" list="z2m-device-list" style="width:160px" value="${esc(dev.z2m_name||'')}" data-field="z2m_name">`)}
+      ${field('Schwellwert (W)', `<input type="number" style="width:90px" value="${dev.threshold_w||500}" min="0" step="50" data-field="threshold_w">`)}
+      ${field('Hysterese (W)', `<input type="number" style="width:90px" value="${dev.hysteresis_w||150}" min="0" step="50" data-field="hysteresis_w">`)}
+      ${field('Min. Laufzeit (min)', `<input type="number" style="width:90px" value="${dev.min_on_minutes||0}" min="0" step="5" data-field="min_on_minutes">`)}
+      <div style="display:flex;flex-direction:column;gap:6px;padding-bottom:2px">
+        <label style="cursor:pointer;display:flex;align-items:center;gap:4px;font-size:12px;white-space:nowrap">
+          <input type="checkbox" ${dev.enabled!==false?'checked':''} data-field="enabled" style="width:auto;margin:0"> Aktiv
+        </label>
+        <label style="cursor:pointer;display:flex;align-items:center;gap:4px;font-size:12px;white-space:nowrap" title="AUS bei Überschuss, EIN bei Netzbezug">
+          <input type="checkbox" ${dev.inverted?'checked':''} data-field="inverted" style="width:auto;margin:0"> Invertiert
+        </label>
+      </div>
+      <button class="btn btn-secondary" style="padding:3px 8px;font-size:12px;flex-shrink:0;align-self:flex-end" onclick="removeSurplusDevice(this)">✕</button>
     </div>
   </div>`;
 }
@@ -1044,6 +1056,7 @@ function _collectSurplusDevices() {
     threshold_w:  parseFloat(row.querySelector('[data-field=threshold_w]').value) || 0,
     hysteresis_w:  parseFloat(row.querySelector('[data-field=hysteresis_w]').value) || 0,
     min_on_minutes: parseFloat(row.querySelector('[data-field=min_on_minutes]').value) || 0,
+    inverted:      row.querySelector('[data-field=inverted]').checked,
     enabled:      row.querySelector('[data-field=enabled]').checked,
   }));
 }
@@ -1086,7 +1099,7 @@ function renderSurplusStatus(surplusData) {
       return `<div style="display:flex;align-items:center;gap:6px;font-size:12px;padding:4px 0">
         ${dot}
         <span>${esc(d.name||d.z2m_name)}</span>
-        <span style="color:var(--text-dim);font-size:11px">ab ${d.threshold_w}W</span>
+        <span style="color:var(--text-dim);font-size:11px">${d.inverted ? '↓' : '↑'} ${d.threshold_w}W</span>
         ${info}
         <span style="margin-left:auto;font-weight:600;color:${on?'var(--green)':'var(--text-dim)'}">${on?'EIN':'AUS'}</span>
       </div>`;