Deye Inverter Entities Sensor Modbus Register 202: Name inverter name battery absorption voltage

Technical Definition

The register name inverter name battery absorption voltage at address 202 is used to monitor name inverter name battery absorption voltage on the Deye Inverter 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 name inverter_name battery absorption voltage (Address: 202)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=202, 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 battery absorption voltage"
  address: 202
  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[Deye Inverter Entities Sensor]

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

💡 Engineer's Insight

Analysis: Battery absorption charging voltage. Constant voltage phase during charging. Measured in Volts (V).

Troubleshooting: Zero or absent indicates absorption phase is not active. Check battery charge status and inverter settings.