Esp32 Solax X1 Boost Modbus Register 1027: Name PV2 input current

Technical Definition

The register name PV2 input current at address 1027 is used to monitor name pv2 input current on the Esp32 Solax X1 Boost.

• Protocol: Modbus RTU
• Data Type: U WORD
• Unit: A
• 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 PV2 input current (Address: 1027)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=1027, 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 PV2 input current"
  address: 1027
  value_type: U_WORD
  unit_of_measurement: "A"

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[Esp32 Solax X1 Boost]

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

💡 Engineer's Insight

Analysis: DC input current from Solar Panel 2 (PV2), typically in Amperes (A).

Troubleshooting: Check PV2 electrical connections and panel output. No current indicates no generation.