Inverter Esp Example Modbus Register 234: Name pv charging average current

Technical Definition

The register name pv charging average current at address 234 is used to monitor name pv charging average current on the Inverter Esp Example.

• Protocol: Modbus RTU
• Data Type: S 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 pv charging average current (Address: 234)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=234, 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 pv charging average current"
  address: 234
  value_type: S_WORD
  unit_of_measurement: "A"

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[Inverter Esp Example]

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

💡 Engineer's Insight

Analysis: PV charging average current (Amps). Current from solar panels charging the battery.

Troubleshooting: Zero means no PV charging current. Could be no sun, panel issue, or battery full.