Esp32Epevermppt Modbus Register 13068: Generated Energy Today L

Technical Definition

The register Generated Energy Today L at address 13068 is used to monitor generated energy today l on the Esp32Epevermppt.

• Protocol: Modbus RTU
• Data Type: U WORD
• Unit: Wh
• 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 Generated Energy Today L (Address: 13068)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=13068, 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: "Generated Energy Today L"
  address: 13068
  value_type: U_WORD
  unit_of_measurement: "Wh"

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[Esp32Epevermppt]

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

💡 Engineer's Insight

Analysis: Generated Energy Today L (Wh). Lower 16-bit word for energy generated today. Part of a 32-bit value for total daily energy.

Troubleshooting: Zero if no generation today. Requires 'Generated Energy Today H' for full value. Check PV input and controller function.