I've recently updated my Sig Energy app and can now enable the Modbus TCP setting myself in Settings > System Settings > Modbus TCP Server Settings. However when I input the IP in the Sigenergy ESS Integration in HA (Settings > Devices & Services > + Add integration (search for Sigenergy ESS) and input the IP shown in my app it always says can't connect. I have tried a different ID as this was recommended if I have an EV charger. Any help would be much appreciated!
Not sure if you have worked it out yet. In the sigenergy app go to system settings > connectivity > device and you should find the IP address there. Give that one a try