One of my clients is a solar installer and they're having an issue with a customer's inverter (Solax X1-Hybrid HV) not connecting to their home WiFi network. It was installed and configured without issue a while back and the inverter connected no problem. However, since then the customer has been sent a replacement router (Vodafone provided Huawei HG659). This has been configured with the same SSID and password as the previous one and all other devices can connect without issue.
The inverter creates it's own ad-hoc network to allow configuration via a browser - we can connect to this without issue, and enter WiFi credentials (have tried via both DHCP and static). When saving the credentials, the config page refreshes as it should but only reloads the same network setup page with blank credentials, and the device doesn't connect to the internet. There are no error messages or logs (that I know of).
It's obviously linked to the router being replaced (hence limited support available from the supplier), but I'm a bit stumped how to solve this one.
For obvious reasons, we don't want to make any alterations to the customer's network setup as everything else is working without issue.
Any ideas are appreciated!
