Growatt grott MQTT feeding DBus PV-Inverter for Victron GX monitoring
You can use grott proxy to side feed a MQTT. From there I've adapted the dbus-venus-mqtt-pvinverter.py code subscribing to the Growatt MIN2500TL 1 phase inverter MQTT feed and convert it feed the Victron DBus.
This is a great solution, which does not need any firmware change on the Growatt shine stick, only changing the growatt-server IP to point to the proxy.
This is working like a charm!