Device Growatt Spf Modbus Register 11: Name inverter name ac out apparent power

Technical Definition

The register name inverter name ac out apparent power at address 11 is used to monitor name inverter name ac out apparent power on the Device Growatt Spf.

• Protocol: Modbus RTU
• Data Type: U DWORD
• Unit: VA
• 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_out_apparent_power (Address: 11)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=11, 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_out_apparent_power"
  address: 11
  value_type: U_DWORD
  unit_of_measurement: "VA"

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[Device Growatt Spf]

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

💡 Engineer's Insight

Analysis: AC output apparent power (VA). Total power supplied, including reactive power.

Troubleshooting: Zero if inverter is off or no load is connected. Check inverter status and load.