Deye Inverter Entities Sensor Modbus Register 109: Name inverter name pv1 voltage

Technical Definition

The register name inverter name pv1 voltage at address 109 is used to monitor name inverter name pv1 voltage on the Deye Inverter Entities Sensor.

• Protocol: Modbus RTU
• Data Type: U WORD
• Unit: V
• 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 pv1 voltage (Address: 109)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=109, 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 pv1 voltage"
  address: 109
  value_type: U_WORD
  unit_of_measurement: "V"

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: PV1 input voltage (V). Voltage from the first solar panel string. Essential for MPPT and power conversion.

Troubleshooting: Zero or low voltage suggests panel string issue, loose connection, or fuse blown. Check panel health and wiring integrity.