A friend who is an electrician advised us, and since there is no gas line in the house, it was built with the future in mind. Photovoltaics and an electric car could still be added.
Having is known to be better than needing. When the photovoltaics are installed, the grid operator only notices the share fed in. If an electric car is connected, the photovoltaic production is practically unnoticeable. Of course, with 30kW photovoltaics and 3.7kW charging power of a plug-in hybrid, this statement no longer applies. For a BEV, you realistically need up to 11kW charging power. There are a few models that can charge at AC 22kW. Of course, this is a technical limit valid today, which may no longer apply in the future, but 11kW charging power is more than enough to fully "refuel" a BEV overnight, even if you drive an eTron or Tesla. Our grid operator provides 30kW anyway, which was already included in the connection flat fee, and the electrician also justified it at least approximately in the I-application (large consumers named), so we also got it confirmed and secured (3x63A). Realistically, in a normal household you never exceed 10kW. You have to turn on all plates and ovens. You only exceed that with a heat pump, and even then only if you have a heating element and it should kick in. I myself have never exceeded 10kW even with a heat pump.
No, why is that? How do you come to such an assumption? It usually isn't worth it and means high investment. Better green electricity providers, I pay 25 cents all in and you won't get electricity produced cheaper with any photovoltaic system!
As always, nonsense from you on this topic. The reality looks quite different. Generation costs here about 6 cents per kWh, plus about 4 cents VAT on self-consumption. After 5 years, these are also eliminated.