diff --git a/bundles/org.openhab.binding.homewizard/src/main/java/org/openhab/binding/homewizard/internal/dto/DataPayload.java b/bundles/org.openhab.binding.homewizard/src/main/java/org/openhab/binding/homewizard/internal/dto/DataPayload.java
index e6154bebfb64f..4769da9e14911 100644
--- a/bundles/org.openhab.binding.homewizard/src/main/java/org/openhab/binding/homewizard/internal/dto/DataPayload.java
+++ b/bundles/org.openhab.binding.homewizard/src/main/java/org/openhab/binding/homewizard/internal/dto/DataPayload.java
@@ -58,13 +58,13 @@ public class DataPayload {
     private int longPowerFailCount;
 
     @SerializedName("active_voltage_v")
-    private int activeVoltage;
+    private double activeVoltage;
     @SerializedName("active_voltage_l1_v")
-    private int activeVoltageL1;
+    private double activeVoltageL1;
     @SerializedName("active_voltage_l2_v")
-    private int activeVoltageL2;
+    private double activeVoltageL2;
     @SerializedName("active_voltage_l3_v")
-    private int activeVoltageL3;
+    private double activeVoltageL3;
 
     @SerializedName("active_current_a")
     private double activeCurrent;
@@ -175,7 +175,7 @@ public int getLongPowerFailCount() {
      *
      * @return current active voltage
      */
-    public int getActiveVoltage() {
+    public double getActiveVoltage() {
         return activeVoltage;
     }
 
@@ -184,7 +184,7 @@ public int getActiveVoltage() {
      *
      * @return active voltage on phase 1
      */
-    public int getActiveVoltageL1() {
+    public double getActiveVoltageL1() {
         return activeVoltageL1;
     }
 
@@ -193,7 +193,7 @@ public int getActiveVoltageL1() {
      *
      * @return active voltage on phase 2
      */
-    public int getActiveVoltageL2() {
+    public double getActiveVoltageL2() {
         return activeVoltageL2;
     }
 
@@ -202,7 +202,7 @@ public int getActiveVoltageL2() {
      *
      * @return active voltage on phase 3
      */
-    public int getActiveVoltageL3() {
+    public double getActiveVoltageL3() {
         return activeVoltageL3;
     }
 
diff --git a/bundles/org.openhab.binding.homewizard/src/test/java/org/openhab/binding/homewizard/internal/dto/P1PayloadTest.java b/bundles/org.openhab.binding.homewizard/src/test/java/org/openhab/binding/homewizard/internal/dto/P1PayloadTest.java
index cf7bdbb59bbbf..33c1c750f03fe 100644
--- a/bundles/org.openhab.binding.homewizard/src/test/java/org/openhab/binding/homewizard/internal/dto/P1PayloadTest.java
+++ b/bundles/org.openhab.binding.homewizard/src/test/java/org/openhab/binding/homewizard/internal/dto/P1PayloadTest.java
@@ -47,10 +47,10 @@ public void deserializeResponse() throws IOException {
         assertThat(key.getActivePowerL1W(), is(-676));
         assertThat(key.getActivePowerL2W(), is(133));
         assertThat(key.getActivePowerL3W(), is(18));
-        assertThat(key.getActiveVoltage(), is(220));
-        assertThat(key.getActiveVoltageL1(), is(221));
-        assertThat(key.getActiveVoltageL2(), is(222));
-        assertThat(key.getActiveVoltageL3(), is(223));
+        assertThat(key.getActiveVoltage(), is(220.0));
+        assertThat(key.getActiveVoltageL1(), is(221.0));
+        assertThat(key.getActiveVoltageL2(), is(222.0));
+        assertThat(key.getActiveVoltageL3(), is(223.0));
         assertThat(key.getTotalEnergyExportT1Kwh(), is(8874.0));
         assertThat(key.getTotalEnergyExportT2Kwh(), is(7788.0));
         assertThat(key.getTotalEnergyImportT1Kwh(), is(10830.511));
@@ -80,10 +80,10 @@ public void deserializeResponseEmpty() throws IOException {
         assertThat(key.getActivePowerL1W(), is(0));
         assertThat(key.getActivePowerL2W(), is(0));
         assertThat(key.getActivePowerL3W(), is(0));
-        assertThat(key.getActiveVoltage(), is(0));
-        assertThat(key.getActiveVoltageL1(), is(0));
-        assertThat(key.getActiveVoltageL2(), is(0));
-        assertThat(key.getActiveVoltageL3(), is(0));
+        assertThat(key.getActiveVoltage(), is(0.0));
+        assertThat(key.getActiveVoltageL1(), is(0.0));
+        assertThat(key.getActiveVoltageL2(), is(0.0));
+        assertThat(key.getActiveVoltageL3(), is(0.0));
         assertThat(key.getAnyPowerFailCount(), is(0));
         assertThat(key.getLongPowerFailCount(), is(0));
         assertThat(key.getTotalEnergyExportT1Kwh(), is(0.0));