Device Growatt Spf Modbus Register 35: Name inverter name inverter current

Technical Definition

The register name inverter name inverter current at address 35 is used to monitor name inverter name inverter 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_inverter_current (Address: 35)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=35, 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_inverter_current"
  address: 35
  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: Inverter output current in Amperes. Current generated by the inverter before AC conversion.

Troubleshooting: Zero if PV input is insufficient or inverter is off. Check PV array status and inverter operation.