I tried all the options suggested by Youtube, and the process mentioned in the manual booklet provided by my solar system unit supplier but nothing worked. If you are in Australia, please google the contact number of Goodwe Inverter and give them a call without any hesitation. I did and they solved my problem in less than five minutes. If you can, it is better to pair the inverter with your home wifi router prior to give them a call (not a rocket science, search youtube and at least pairing thing works by their suggestion). Even if you can't they can help you out on that occasion either. So don't waste time and give them a call.