diff --git a/src/app/battery/battery.component.html b/src/app/battery/battery.component.html
index d4ad400..050d49b 100644
--- a/src/app/battery/battery.component.html
+++ b/src/app/battery/battery.component.html
@@ -1,7 +1,7 @@
 <div class="p-3">
     <div class="d-flex mb-3">
         <div class="d-flex flex-grow-1 align-items-center">
-            <h3 class="mb-0 text-white">Powerwall: {{batteryService.total}} V</h3>
+            <h3 class="mb-0 text-white">Powerwall: {{batteryService.total | round}} V</h3>
         </div>
         <div class="d-flex flex-grow-1 align-content-center justify-content-end">
             <mat-button-toggle-group (change)="batteryService.setRelayMode($event.value)">
diff --git a/src/app/battery/battery.service.ts b/src/app/battery/battery.service.ts
index 11df0fe..789b85c 100644
--- a/src/app/battery/battery.service.ts
+++ b/src/app/battery/battery.service.ts
@@ -57,6 +57,12 @@ export class BatteryService {
                 }
             });
 
+            this.batteries.map((battery, i, arr) => {
+                if(i % 2 == 1) return battery;
+                console.log(i, battery.charge);
+                battery.charge = battery.charge - arr[i + 1].charge;
+            });
+
             this.total = this.batteries.reduce((acc, battery) => acc + battery.charge, 0) / 2;
 
             console.log(this.batteries)