diff --git a/grafana/dashboards/charging-stats.json b/grafana/dashboards/charging-stats.json
index 3fb00372b2..43ccb68e3f 100644
--- a/grafana/dashboards/charging-stats.json
+++ b/grafana/dashboards/charging-stats.json
@@ -433,6 +433,7 @@
         "colorScale": "linear",
         "colorScheme": "interpolateGreens",
         "exponent": 0.5,
+        "min": 0,
         "mode": "opacity"
       },
       "dataFormat": "timeseries",