Deye Inverter Entities Sensor Modbus Register 166: Name inverter name aux output power

Technical Definition

The register name inverter name aux output power at address 166 is used to monitor name inverter name aux output power on the Deye Inverter Entities Sensor.

• Protocol: Modbus RTU
• Data Type: S WORD
• Unit: W
• Access: Read Only

How to Read (Python pymodbus)

Use this code snippet to read this specific value via RS485:

from pymodbus.client.sync import ModbusSerialClient

client = ModbusSerialClient(method='rtu', port='/dev/ttyUSB0', baudrate=9600)
client.connect()

# Read name inverter_name aux output power (Address: 166)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=166, count=2, unit=1)

if not result.isError():
    print(f"Raw Value: {result.registers}")
else:
    print("Error reading register")

client.close()

Integration (Home Assistant)

Paste this into your configuration.yaml:

- platform: modbus_controller
  name: "name inverter_name aux output power"
  address: 166
  value_type: S_WORD
  unit_of_measurement: "W"

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[Deye Inverter Entities Sensor]

    PLC -- "A+ (D+)" --> Device
    PLC -- "B- (D-)" --> Device
    PLC -- GND --> Device

💡 Engineer's Insight

Analysis: Auxiliary output power (W). Power for internal inverter functions or auxiliary loads. Usually a low, stable value.

Troubleshooting: Unexpected zero or significant deviation might indicate an internal power supply issue within the inverter itself.