@annegerben it’s very hard to tell which models are supported as there is no information about it…
Actually I think it’s not the inverter itself that matters but the module that is plugged into the serial port and hosts a webserver (via WiFi or ethernet cable depending on the module).
Seems like your module does not return the “maxPower” key, but I could work around this in code so it will work for you. I’ll have a look at it.