Device Smg2 Modbus Register 234: Name inverter name pv charging average current

Technical Definition

The register name inverter name pv charging average current at address 234 is used to monitor name inverter name pv charging average current on the Device Smg2.

• Protocol: Modbus RTU
• Data Type: S WORD
• Unit: A
• 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_charging_average_current (Address: 234)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=234, 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_charging_average_current"
  address: 234
  value_type: S_WORD
  unit_of_measurement: "A"

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 current (Amps) from PV during charging. Represents solar contribution to charging.

Troubleshooting: Zero if no solar input, shading, faulty PV panel, or inverter issue. Verify PV system output.