Esp8266 Config Modbus Register 11036: Inverter name Battery SoC

Technical Definition

The register inverter name Battery SoC at address 11036 is used to monitor inverter name battery soc on the Esp8266 Config.

• Protocol: Modbus RTU
• Data Type: U WORD
• Unit: %
• 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 inverter_name Battery SoC (Address: 11036)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=11036, 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: "inverter_name Battery SoC"
  address: 11036
  value_type: U_WORD
  unit_of_measurement: "%"

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[Esp8266 Config]

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

💡 Engineer's Insight

Analysis: State of Charge (SoC) of the battery, representing the current charge level as a percentage (0-100%).

Troubleshooting: Indicates a complete discharge, potential battery fault, or communication issue with the battery management system.