Solar Inverter interface with Modbus TCP: client.connect issues [SOLVED]

Update: Used Wireshark to capture traffic between

Arduino IP : 192.168.10.180
Inverter IP : 192.168.10.5
PC IP : 192.168.10.115

  1. inverter and PC during a successful Telnet :port 502 attempt

After the ARP discovery , a TCP connection is established

and..

  1. inverter and arduino during a failed connect attempt

In this case after the ARP discovery, nothing happens.

Any ideas why ?

PS: Sorry for the small picture size.