Deye Inverter Entities Sensor Modbus Register 91: Name inverter name dc radiator Temperature

Technical Definition

The register name inverter name dc radiator Temperature at address 91 is used to monitor name inverter name dc radiator Temperature on the Deye Inverter Entities Sensor.

• Protocol: Modbus RTU
• Data Type: S WORD
• Unit: °C
• 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 dc radiator temperature (Address: 91)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=91, 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 dc radiator temperature"
  address: 91
  value_type: S_WORD
  unit_of_measurement: "°C"

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: DC radiator Temperature (°C). Monitors internal cooling system performance. High temps can reduce efficiency or cause shutdowns.

Troubleshooting: Indicates overheating. Check fan operation, heatsink cleanliness, and ambient Temperature. May signal internal component failure.