Deye Inverter Entities Sensor Modbus Register 219: Name inverter name battery capacity low bat

Technical Definition

The register name inverter name battery capacity low bat at address 219 is used to monitor name inverter name battery capacity low bat on the Deye Inverter Entities Sensor.

• Protocol: Modbus RTU
• Data Type: INT16
• Unit: %
• 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 capacity low bat (Address: 219)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=219, 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 capacity low bat"
  address: 219
  value_type: INT16
  unit_of_measurement: "%"

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 SoC (%) considered 'low', triggering warnings or specific operational modes.

Troubleshooting: Zero suggests a potential communication loss or a very low SoC. Check battery BMS and connections.