Solismini2000 Modbus Register 3012: Power generated last month

Technical Definition

The register Power generated last month at address 3012 is used to monitor power generated last month on the Solismini2000.

• Protocol: Modbus RTU
• Data Type: U DWORD
• Unit: kWh
• 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 Power generated last month (Address: 3012)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=3012, 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: "Power generated last month"
  address: 3012
  value_type: U_DWORD
  unit_of_measurement: "kWh"

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[Solismini2000]

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

💡 Engineer's Insight

Analysis: Energy Generated Last Month. Units: Kilowatt-hours (kWh). Cumulative energy produced by the solar system during the previous calendar month.

Troubleshooting: Abnormally low values compared to expectations may indicate reduced sunlight, component degradation, or system issues affecting the previous month's output.