Laying network cable

I don't know if I move in different circles and visit or accompany other new buildings, but in the last 10 years I see few houses that have fewer than 5 CAT sockets/connections. The obligatory 5 sockets are now standard for many general contractors/main contractors.

So in our immediate neighborhood, the 4 houses that have been built in the last 15 years, no one has that, nor among friends/family. A buddy built in a new housing street with 12 new houses 5 years ago, where a neighbor has a smart home because she works in that field. But of course I don't know much more. And many people just want to build cheaply anyway, as long as it's a house... Many still rely on gas... We are really going full program with photovoltaics plus storage, geothermal energy, and a wallbox for the e-car.

I already wanted to write is Berlin is also there. I only know of houses and apartments that have been built in the last 10 years with more LAN connections. Storage with photovoltaics "does not pay off" at the moment. What kind of wallbox are you getting? Doesn't it also need LAN or at least Wifi? Most modern cars also do updates via Wifi. Does yours reach the garage? You didn't write how big the house is and which KFW standard you are building to. Therefore, no statement can be made here. Geothermal probes often have to be reset after 20-25 years. Do you also have that in your cost calculation? When you do a TCO analysis, you quickly see what is just play or "green conscience" and what pays off. Storage is one such topic. We have now also ordered one, but it was rather a bycatch or a goodie in the negotiations. Gas is still the best option in many areas at the moment. (larger heating demand, larger buildings, cold temperatures, water protection areas, etc.) How large is the total connection capacity of your house?

Gas is a fossil fuel that will eventually run out, just like crude oil; when it becomes scarce, it gets expensive. The government is already talking about a CO2 tax, etc. If gas ever costs three times as much, it will quickly become expensive... We wanted to build, also to build in order to be somewhat self-sufficient and independent from gas and electricity prices. We will use everything from Viessmann, then you can join the community there.

It basically works like this: you give the excess electricity to the community and when you need more than you produce, you get it back "for free." We have 150 sqm plus 60 sqm granny flat, and an energy demand of about 6500 kWh was determined for household electricity, heating, and hot water. A 9.9 kW system will be installed on the roof, which unfortunately will not fully cover our annual electricity demand. So we need more from the community than we give, therefore we have to pay about 10 to 15€ per month.

If that really works, then show me someone who heats their house, supplies it with electricity, and has hot water for 10€ a month.

That is the theory so far, I am curious about the practice... In my opinion, a storage system only makes sense today because you hardly get anything for selling electricity, the best is always self-consumption.

Of course, this is all not cheap and costs three times as much as a gas boiler with solar thermal, but I find the technology great and electricity and gas get more expensive every year; someday day X will come when it pays off.

A gas boiler also has a limited lifespan; it has to be replaced at some point...

A wallbox doesn't need the internet, maybe in the future that might be... ONE car gets updates installed in the workshop and the new ones get them over the air because they have built-in SIM cards for all their live data.

Gas is a fossil fuel that will eventually run out just like crude oil; when it becomes scarce, it will become expensive.

By then you will have grown grandchildren or you can still switch to a heat pump when two to three gas boilers have reached the end of their lifespan.

And how does the wall box know that it should charge the car because the sun is shining right now? You need a connection between the photovoltaic inverter and the wall box. Nowadays usually via LAN. You won’t really be able to charge from your storage. Neither the capacity nor the power is sufficient. Is your storage three-phase?
Do you also have controlled residential ventilation? I find the electricity consumption quite low for a modern single-family house with a granny flat. With an electric car, the electricity demand is of course higher...
I won’t write anything about this electricity community concept. It’s like solar power.
Not to offend you, but overall this sounds more like you fell for all the marketing.
A storage “pays off” today only if the purchase, maintenance, and upkeep are cheaper than if you just bought electricity all the time. That’s what I meant by TCO analysis...
Also, the OTA updates run mostly over WiFi. Only smaller things over mobile networks.
The CO2 tax is for the Greta followers. It has nothing to do with scarce fuels. You are just under 30. But do you know how often the oil was supposed to run out already?
I’m not much older and you shouldn’t waste resources, but much of what you write here is rather half-knowledge.
What KFW standard does your house have? KFW40+?
That doesn’t pay off in your lifetime either...
Insulation made of biodegradable materials?
I’m out here. The whole picture doesn’t fit together. Wanting to use HomematicIP without having even the simplest network basics. No electrician either.
No insight either. As you wrote yourself, it’s more about just having a house.
No real data about the house was provided either.
Still, good luck.

You guys are so cool here

When I say I am old-fashioned and don't need a LAN socket in every room, people start telling me that I am not thinking about the future.

But when I want modern heating technology, they say, "Use gas, that's always been the best..."