diff --git a/typescript/frontend-marios2/src/content/dashboards/Overview/chartOptions.tsx b/typescript/frontend-marios2/src/content/dashboards/Overview/chartOptions.tsx
index 64ec1133f..a44863d5c 100644
--- a/typescript/frontend-marios2/src/content/dashboards/Overview/chartOptions.tsx
+++ b/typescript/frontend-marios2/src/content/dashboards/Overview/chartOptions.tsx
@@ -244,6 +244,8 @@ export const getChartOptions = (
               const seriesName = w.config.series[seriesIndex].name;
               if (seriesName === 'Battery SOC') {
                 return val.toFixed(2) + ' %';
+              } else if (seriesName === 'Battery Voltage') {
+                return val.toFixed(2) + ' (V)';
               } else {
                 return (
                   formatPowerForGraph(val, chartInfo.magnitude).value.toFixed(