Only with the option to mount the inverter outside. If you want it inside the house, then you don't need a network outside. Thanks for the addition
You often only need the network cable if you don't have good Wi-Fi outside. For example, Fronius can also handle Wi-Fi without any problems. Most other types should also be able to do that. So it's not a must. But it can be helpful. Maybe the future e-car also wants to download updates at night. Then a Wi-Fi access point for good coverage outside would also be nice.