Deye Inverter Entities Sensor Modbus Register 221: Name inverter name battery restart voltage

Technical Definition

The register name inverter name battery restart voltage at address 221 is used to monitor name inverter name battery restart 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 restart voltage (Address: 221)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=221, 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 restart voltage"
  address: 221
  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 voltage (Volts) at which the inverter will restart operations after a voltage-related shutdown.

Troubleshooting: Zero might mean restart is disabled or there's a voltage reading error. Check battery and BMS.