FOXESS

Installation

1. 1Install the FoxESS Modbus extension module on the inverter and connect the RS485 A and B terminals to the ModbusCloud gateway (MCG or MLP series).
2. 2Set the inverter Modbus slave address to match the address configured in the ModbusCloud template, typically address 1.
3. 3Confirm the RS485 baud rate on the inverter is set to 9600, matching the template default.
4. 4Import the FoxESS hybrid inverter template from the ModbusCloud template library into your project.
5. 5Verify communication by checking that PV1 voltage (register 31000) returns a plausible value on the ModbusCloud dashboard.
6. 6Assign meaningful names to each register reading and configure any desired alerts or dashboard widgets.

Things to watch for

01

The gateway cannot communicate with the inverter. What should I check?

Verify that the Modbus extension module is properly installed in the FoxESS inverter. Check that RS485 A and B wires are not swapped and that the baud rate is set to 9600 on both the inverter and the gateway.

02

PV power and load power values seem inconsistent. Why?

PV and meter power registers report in kW, while load power registers report in W. Make sure your dashboard scaling accounts for this difference to avoid misreadings.

03

Cumulative energy values look incorrect or truncated. How do I fix this?

Total energy registers (32000, 32009, 32012, 32021) are uint32 values spanning two consecutive Modbus addresses. Ensure the template is configured to read both addresses as a single 32-bit value with the correct byte order.

04

Do I need a termination resistor on the RS485 bus?

If the ModbusCloud gateway is at the end of the RS485 bus or the cable run exceeds 10 metres, a 120 ohm termination resistor between A and B is recommended to reduce communication errors.

Registers (15)

15 read / 0 write

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