diff --git a/sunspec/integrationpluginsunspec.json b/sunspec/integrationpluginsunspec.json
index 6696477..6c0951c 100644
--- a/sunspec/integrationpluginsunspec.json
+++ b/sunspec/integrationpluginsunspec.json
@@ -1442,10 +1442,10 @@
                             "displayName": "Charging rate",
                             "displayNameEvent": "Charging rate changed",
                             "type": "int",
-                            "minValue": 0,
+                            "minValue": -100,
                             "maxValue": 100,
                             "unit": "Percentage",
-                            "defaultValue": false,
+                            "defaultValue": 0,
                             "writable": true,
                             "displayNameAction": "Set charging rate"
                         },
@@ -1455,10 +1455,10 @@
                             "displayName": "Discharging rate",
                             "displayNameEvent": "Discharging rate changed",
                             "type": "int",
-                            "minValue": 0,
+                            "minValue": -100,
                             "maxValue": 100,
                             "unit": "Percentage",
-                            "defaultValue": false,
+                            "defaultValue": 0,
                             "writable": true,
                             "displayNameAction": "Set discharging rate"
                         },