It may be old, but since there is already a way to get it in to Domoticz, there is likely a way to get it in to Home Assistant directly, without having to rely on Domoticz. I can’t help re Solar on the energy dashboard, because I don’t have solar.
Here you go - a collection of Python Scripts that will connect to the inverter, request the data, receive and parse the data and then spit out JSON, which can then be sent to MQTT.: