My inverter doesn't have Internet access. Solax point blank refused to tell me how to read information from it. They're only interested if you send all of your data to their cloud server in China.

I can see the inverter on my local network. But all ports are closed. It occasionally sends outbound traffic to the solax servers via MQTT. I can capture that traffic and see what it's doing, but it's just init and time sync messages. Presumably the server needs to send a suitable response to prompt the inverter to start sending power data. But Solax won't tell me what the messages should be.

They are obstructive when I try and find out information. I'd class them as actively customer hostile and are going out of their way to prevent me getting at the data from the device which I bought.