Device Sofar Ktlg3 Modbus Register 13: Name inverter name ac output reactive power

Technical Definition

The register name inverter name ac output reactive power at address 13 is used to monitor name inverter name ac output reactive power on the Device Sofar Ktlg3.

• Protocol: Modbus RTU
• Data Type: S WORD
• Unit: kVar
• 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_ac_output_reactive_power (Address: 13)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=13, 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_ac_output_reactive_power"
  address: 13
  value_type: S_WORD
  unit_of_measurement: "kVar"

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[Device Sofar Ktlg3]

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

💡 Engineer's Insight

Analysis: AC Output Reactive Power (var). Represents the power that oscillates between the source and the load.

Troubleshooting: Typically zero for unity power factor inverters. May indicate grid issues or inverter configuration problems if non-zero.