Solis Modbus Inv Addon Acr10R 1Ph Modbus Register 3272: Meter Apparent Power

Technical Definition

The register Meter Apparent Power at address 3272 is used to monitor meter apparent power on the Solis Modbus Inv Addon Acr10R 1Ph.

• Protocol: Modbus RTU
• Data Type: S DWORD
• Unit: VA
• 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 Meter Apparent Power (Address: 3272)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=3272, 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: "Meter Apparent Power"
  address: 3272
  value_type: S_DWORD
  unit_of_measurement: "VA"

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[Solis Modbus Inv Addon Acr10R 1Ph]

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

💡 Engineer's Insight

Analysis: Measures the apparent power, typically in Volt-Amperes (VA). The vector sum of real and reactive power.

Troubleshooting: Zero apparent power means no electrical load or source is active. Verify system connectivity and operational status of the device.