Growatt Inverter v2

Installation

1. 1Connect an RS485 twisted-pair cable from the 485-3 port on the Growatt SPH inverter to the RS485 terminal on your ModbusCloud gateway (MCG or MLP series).
2. 2Verify the Growatt inverter serial settings: 9600 bps baud rate, 1 stop bit, no parity.
3. 3Confirm the Modbus slave address on the inverter is set to 1 (factory default) or note the configured address.
4. 4In the ModbusCloud platform, add a new device and import the Growatt Inverter v2 template.
5. 5Set the Modbus address in ModbusCloud to match the address configured on the inverter.
6. 6Power on the gateway and verify that register values such as PV input power and battery SOC appear on the dashboard.

Things to watch for

01

Which port on the Growatt SPH inverter should I use for Modbus?

Use the 485-3 port. Other RS485 ports on the inverter may serve different protocols or monitoring dongles and can conflict with Modbus communication.

02

I see zero values for all registers. What should I check?

Verify that the baud rate is set to 9600, stop bits to 1, and parity to none, both on the inverter and in the ModbusCloud gateway configuration. Also confirm the correct Modbus slave address.

03

Can I use this template with non-SPH Growatt inverters?

This template is validated for the Growatt SPH series. Other models such as the MIN or MID series may use different register maps. Check the Growatt Modbus documentation for your specific model before using this template.

04

Are the energy total registers cumulative or daily?

The template includes both daily and cumulative total registers for grid export and user consumption energy. Daily values reset at midnight according to the inverter clock.

Registers (29)

29 read / 0 write

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