Is the house connection capacity of 14.5 kW sufficient?

I also think that we are talking about rare events here. You would have to wear everything in winter and have the hob on booster mode together with the oven at 250° with grill on top and bottom, hot water tank used up and both showers running. Then there’s the microwave and vacuum cleaner. If then the hairdryer (sorry, hot air hair dryer) turns on... you can probably get to 15 kW. But I would like to have a little more buffer...

And the "larger" SLS will be enough then? There doesn’t need to be an even "thicker" main cable laid to the house?

Your reasoning is not that far-fetched... Imagine the 2nd Christmas Day. The duck is roasting in the oven, the dishwasher is cleaning the dishes from previous days. You quickly prepare the sauce and the dumplings, of course with the booster function because Grandma Annegret has already said for the third time that she’s hungry. One daughter is already showering for the second time today because she is finally allowed to sleep at her new boyfriend’s, the other is drying her hair... Suddenly suddenly the cookies standing on the living room table fall over, and the man of the house turns on the vacuum cleaner....

Yes, rare events are not "never occurring events". That’s why I wish for a bit more buffer...

The problem is you just don't know what to expect. Topic: electromobility.

Well, you do know quite a bit: Electric cars can typically draw up to 22kW via alternating current (i.e., household power in the broadest sense). A typical battery ranges between 20 (small city car) and 100kWh (large SUV). That means with 11kW you have between 2 and 10 hours of charging time. So that's enough to charge overnight. If you want faster charging, you typically have DC fast chargers on highways. So I would at least factor in 11kW charging power for an electric car and design the connection higher (>22kW).

Well, you already know quite a bit: Electric cars can typically draw up to 22 kW from alternating current (i.e., household electricity in the broadest sense). A typical battery ranges from 20 kWh (small city car) to 100 kWh (large SUV). That means with 11 kW charging power, charging times are between 2 and 10 hours. So it's enough to charge overnight. If you want faster charging, there are usually DC fast chargers on the highway.

So I would at least factor in 11 kW charging power for an electric car and design the connection higher (>22 kW).

The sentence is indeed unfortunately phrased. I actually just wanted to raise awareness that this topic should also be kept in mind when building a house at the present time.

Normal common house connection is 30 KVa. In the house connection box there are then 63A. SLS 40A. The size of the SLS can also be 35A depending on the supplier. In addition, from 50 A SLS, the wiring in the meter cabinet must also be 16 quad wire instead of the usual 10.

We have 125A. Having is better than needing. For a "normal" house, I would go towards 63A. Thus, plenty of "room".