hello, my name is martin and i am new here. i have the following problem: how can i fix to see my grid tied inverter in my gx divice or vrm portal? do i need a cable straight from inverter to gx or can it also go by router?
As long as your inverter is a Victron inverter then you connect the VE Bus socket on the inverter to the VE Bus socket on the Cerbo. Use a standard RJ45 UTP cable (ethernet cable).
https://www.victronenergy.com/media/pg/Cerbo_GX/en/connecting-victron-products.html
Depending on the model of your grid tied inverter - it need not be a Victron inverter - then the network connection can go via the router. Some inverters will be automatically ‘discovered’ eg Fronius, others you will have to set up as modbus devices.