Hi @Port forwarding, welcome. 

You've come to the right place! On our forum our community can help you out. Are there any specific questions you have about port forwarding? 

Take a look in the following topic from @wjb. It's in Dutch but a lot of the langauge is universal.

@Hanna_, I think you used the wrong link. 

This topic describes how to configure port-forwardings on a V10.

It should however not be necessary to create port-forwarding for solar panels as normally the converter of solar panels is connected to the cloud of the supplier and end-users can access their converter through the portal of the supplier.

@wjb thanks! Indeed you have sent  the right link! Anyway, you were also right, I didn't need any port forwarding, but just an antenna connected to my inverter...the installer has forgotten it!