Device Smg2 Modbus Register 219: Name inverter name pv average voltage

Technical Definition

The register name inverter name pv average voltage at address 219 is used to monitor name inverter name pv average voltage on the Device Smg2.

• Protocol: Modbus RTU
• Data Type: S 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_pv_average_voltage (Address: 219)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=219, 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_pv_average_voltage"
  address: 219
  value_type: S_WORD
  unit_of_measurement: "V"

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[Device Smg2]

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

💡 Engineer's Insight

Analysis: Average DC voltage from the solar panels. Unit: Volts (V).

Troubleshooting: Zero suggests no solar input. Check panel connections, shading, or inverter PV input status.