diff --git a/charger/kathrein.go b/charger/kathrein.go
index 3f516148e..e3b17be10 100644
--- a/charger/kathrein.go
+++ b/charger/kathrein.go
@@ -170,11 +170,6 @@ func NewKathreinFromConfig(ctx context.Context, other map[string]any) (api.Charg
 		return nil, err
 	}
 
-	// Enable EMS-Control
-	if _, err := wb.conn.WriteSingleRegister(kathreinRegEMSControlRegister, 0x8000); err != nil {
-		return nil, err
-	}
-
 	return wb, nil
 }
 
@@ -320,7 +315,7 @@ func (wb *Kathrein) ChargeDuration() (time.Duration, error) {
 		return 0, err
 	}
 
-	return time.Duration(binary.BigEndian.Uint16(b)) * time.Second, nil
+	return time.Duration(binary.BigEndian.Uint32(b)) * time.Second, nil
 }
 
 var _ api.ChargeRater = (*Kathrein)(nil)
@@ -373,13 +368,12 @@ func (wb *Kathrein) Phases1p3p(phases int) error {
 	}
 
 	// Disable and re-enable charging to apply the new phase setting
+	if err := wb.Enable(false); err != nil {
+		return err
+	}
+
 	if enabled {
-		if err := wb.Enable(false); err != nil {
-			return err
-		}
-		if err := wb.Enable(true); err != nil {
-			return err
-		}
+		return wb.Enable(true)
 	}
 
 	return nil
@@ -445,15 +439,15 @@ func (wb *Kathrein) Diagnose() {
 	}
 
 	if b, err := wb.conn.ReadHoldingRegisters(kathreinRegGrantedCurrent, 1); err == nil {
-		fmt.Printf("EVSE - Granted Current:\t%d mA\n", b[1])
+		fmt.Printf("EVSE - Granted Current:\t%d mA\n", binary.BigEndian.Uint16(b))
 	}
 
 	if b, err := wb.conn.ReadHoldingRegisters(kathreinRegGrantedPower, 1); err == nil {
-		fmt.Printf("EVSE - Granted Power:\t%d W\n", b[1])
+		fmt.Printf("EVSE - Granted Power:\t%d W\n", binary.BigEndian.Uint16(b))
 	}
 
 	if b, err := wb.conn.ReadHoldingRegisters(kathreinRegEMSControlRegister, 1); err == nil {
-		fmt.Printf("EMS-Control - Control-Register:\t%d\n", b[1])
+		fmt.Printf("EMS-Control - Control-Register:\t%d\n", b[0])
 	}
 
 	if b, err := wb.conn.ReadHoldingRegisters(kathreinRegEMSSetpointRelais, 1); err == nil {
@@ -461,11 +455,11 @@ func (wb *Kathrein) Diagnose() {
 	}
 
 	if b, err := wb.conn.ReadHoldingRegisters(kathreinRegEMSSetpointChargingCurrent, 1); err == nil {
-		fmt.Printf("EMS-Control - Setpoint Charging Current:\t%d mA\n", b[1])
+		fmt.Printf("EMS-Control - Setpoint Charging Current:\t%d mA\n", binary.BigEndian.Uint16(b))
 	}
 
 	if b, err := wb.conn.ReadHoldingRegisters(kathreinRegEMSTimeoutPeriod, 1); err == nil {
-		fmt.Printf("EMS-Control - Timeout Period:\t%d s\n", b[1])
+		fmt.Printf("EMS-Control - Timeout Period:\t%d s\n", binary.BigEndian.Uint16(b))
 	}
 
 	if b, err := wb.conn.ReadHoldingRegisters(kathreinRegEMSTimeOutFallbackPattern, 1); err == nil {
@@ -473,6 +467,6 @@ func (wb *Kathrein) Diagnose() {
 	}
 
 	if b, err := wb.conn.ReadHoldingRegisters(kathreinRegEMSTimeOutFallbackCurrent, 1); err == nil {
-		fmt.Printf("EMS-Control - Timeout Fallback Current:\t%d mA\n", b[1])
+		fmt.Printf("EMS-Control - Timeout Fallback Current:\t%d mA\n", binary.BigEndian.Uint16(b))
 	}
 }