Communication to Sigenergy Sigen Hybrid 8.0 TP2 using Modbus TCP

Hi.
I have tried to communicate with my Sigenstor inverter using Modbus TCP. Modbus TCP is enabled in the Sigenstor and I am using a Modbus TCP slave. The connection to the Sigenstor looks okay and the connection is online, but when I try to read holding registers via a Modbus poller it doesn’t work. Has anyone managed to get communication working with Sigenergy?