Device Growatt Spf Modbus Register 34: Name inverter name ac out current

Technical Definition

The register name inverter name ac out current at address 34 is used to monitor name inverter name ac out current on the Device Growatt Spf.

• Protocol: Modbus RTU
• Data Type: U 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_ac_out_current (Address: 34)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=34, 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_current"
  address: 34
  value_type: U_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 Growatt Spf]

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

💡 Engineer's Insight

Analysis: AC output current in Amperes. Represents the current flowing from the inverter to the grid or load.

Troubleshooting: Zero if no load is connected, inverter is off, or there's an AC output fault. Verify load and inverter status.