The Growatt Smart Meter TPM-CT-E provides the Growatt inverter with information on how much power is going which way.
So you can limit the production of the solar panels based on your consumption.
Install the Growatt Smart meter at the very beginning of the meter box to take valuable measurements.
This particular Growatt Smart meter TPM-CT-E comes with 3 CT coils, which need to be coupled to the energy meter.
Then connect the Growatt Smart meter directly to the RS485 port of the inverter, or to the RS485 input of the Shine master.