diff --git a/package.json b/package.json
index a70d9ff0..6e9142a5 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "sunsynk-power-flow-card",
-  "version": "6.1.3",
+  "version": "6.1.4",
   "description": "A customizable Home Assistant card to emulate the Sunsynk System flow that's displayed on the Inverter screen.",
   "main": "sunsynk-power-flow-card.js",
   "scripts": {
diff --git a/src/index.ts b/src/index.ts
index 2fa0a184..64aa018d 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1185,7 +1185,7 @@ export class SunsynkPowerFlowCard extends LitElement {
         } else {
             pvPercentage = Utils.toNum(Math.min(pvPercentageRaw, 100), 0);
             batteryPercentage = Utils.toNum(Math.min(batteryPercentageRaw, 100), 0);
-            gridPercentage = 100 - (pvPercentage + batteryPercentage);
+            gridPercentage = totalGridPower > 0 ? 100 - (pvPercentage + batteryPercentage) : 0;
         }
 
         //console.log(`${pvPercentage} % PVPercentage, ${batteryPercentage} % BatteryPercentage, ${gridPercentage} % GridPercentage`);