Epever Scc Entities Sensor Modbus Register 12544: Scc name PV Input Voltage

Technical Definition

The register scc name PV Input Voltage at address 12544 is used to monitor scc name pv input voltage on the Epever Scc Entities Sensor.

• Protocol: Modbus RTU
• Data Type: U WORD
• Unit: V
• 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 scc_name PV Input Voltage (Address: 12544)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=12544, 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: "scc_name PV Input Voltage"
  address: 12544
  value_type: U_WORD
  unit_of_measurement: "V"

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[Epever Scc Entities Sensor]

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

💡 Engineer's Insight

Analysis: Solar panel input voltage. Measured in Volts (V). Indicates the potential difference from the PV array.

Troubleshooting: Zero indicates no sunlight, open circuit on PV, or faulty sensor. Low values may mean poor panel condition or shading.