Esp8266 Config Modbus Register 11005: Inverter name PV2 Power

Technical Definition

The register inverter name PV2 Power at address 11005 is used to monitor inverter name pv2 power on the Esp8266 Config.

• Protocol: Modbus RTU
• Data Type: S WORD
• Unit: kW
• 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 PV2 Power (Address: 11005)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=11005, 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 PV2 Power"
  address: 11005
  value_type: S_WORD
  unit_of_measurement: "kW"

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: Calculates the power output from the second photovoltaic string. Units: Watts (W). Monitors total power contribution from PV2.

Troubleshooting: Review PV2 voltage and current. Zero power output indicates no energy production from PV2, likely due to environmental or electrical faults.