diff --git a/config/config.yaml b/config/config.yaml
index 1dfeb93..6a840d2 100644
--- a/config/config.yaml
+++ b/config/config.yaml
@@ -150,20 +150,20 @@ output:
         attribute: voltageL1
         name: Voltage L1
         unit: V
-        register_type: input
+        register_type: holding
         data_type: float32
         adaptor: floatAdaptor
       - address: 16
         attribute: voltageL2
         name: Voltage L2
         unit: V
-        register_type: input
+        register_type: holding
         data_type: float32
         adaptor: floatAdaptor
       - address: 18
         attribute: voltageL3
         name: Voltage L3
         unit: V
-        register_type: input
+        register_type: holding
         data_type: float32
         adaptor: floatAdaptor
diff --git a/src/pv_controller/ModbusBase.py b/src/pv_controller/ModbusBase.py
index 93e22ce..9c2fdf5 100644
--- a/src/pv_controller/ModbusBase.py
+++ b/src/pv_controller/ModbusBase.py
@@ -51,6 +51,7 @@ class ModbusHandler:
       dataType = DATA_TYPES[data_type]
       count = dataType.value[1]
 
+      logger.debug(f"{self.client=}, {addr=}, {count=}, {slave=}")
       res = readFunc(self.client, addr, count=count, device_id=slave)
       if (isinstance(res, pymodbus.pdu.register_message.ReadHoldingRegistersResponse) or
           isinstance(res, pymodbus.pdu.register_message.ReadInputRegistersResponse) or