ᐅ Installing Network Cables

Mycraft schrieb:

I don’t know if I’m moving in different circles or visiting different new builds, but over the past 10 years, I’ve seen very few houses with fewer than 5 CAT sockets/connections. Many general contractors/builders now include the standard 5 sockets as a basic feature.

In our immediate neighborhood, the four houses built in the last 15 years don’t have that, nor do any in my circle of friends or family. One friend built in a new development street with 12 houses five years ago, and only one neighbor has a smart home because they work professionally with it.

But of course, I don’t know much beyond that.

And a lot of people just want to build cheaply, as long as it’s a house... Many still rely on gas systems. We are going all out with photovoltaics plus battery storage, geothermal heating, and a charging station for the electric car.

I was about to ask if this is in Berlin @Mycraft, but it seems it is.

I only know of houses and apartments built in the last 10 years that have more LAN connections.
@Stadtvilla19 Storage with photovoltaic systems currently isn’t cost-effective. What kind of wall box are you planning to get? Doesn’t it also require LAN or at least Wi-Fi? Most modern cars download updates over Wi-Fi. Is your Wi-Fi signal strong enough to reach the garage?
You didn’t mention the size of the house or which KfW standard you are building to. Without that information, it’s hard to say anything concrete. Ground source heat probes often need to be replaced after 20-25 years. Have you included that in your cost calculations? If you do a total cost of ownership (TCO) analysis, you quickly see what is just a nice-to-have or “green conscience” feature and what actually makes financial sense. Storage systems fall into this category. We have also finally ordered one, but it was more of a side benefit or bonus during the negotiations.
Gas is still the best option in many areas right now (for high heating demand, larger buildings, cold climates, water protection zones, etc.).
What is the total connected load 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 CO2 taxes and similar measures. If gas prices triple at some point, costs will rise quickly. We wanted to build partly to be self-sufficient and independent from gas and electricity prices. We will use all Viessmann products so we can join their community.

The system basically works by contributing excess electricity to the community, and if you need more than you produce, you receive it back “for free.” We have a 150 sqm (1,615 sq ft) house plus a 60 sqm (645 sq ft) granny flat, and an estimated energy demand of about 6,500 kWh for household electricity, heating, and hot water. A 9.9 kW system will be installed on the roof, which unfortunately won’t fully cover our annual electricity needs. So we will need to get more from the community than we give, which means paying about 10 to 15 € per month.

If this really works as claimed, then show me someone who heats their home, powers it, and provides hot water for just 10 € a month.

That’s the theory so far; I’m curious about how it will work in practice. In my opinion, a storage battery only makes sense today if you don’t get much for selling electricity back to the grid—using your own power is always best.

Of course, none of this is cheap and costs about three times as much as a gas boiler with solar thermal, but I find the technology great, and electricity and gas prices rise every year. So eventually there will be a day when it pays off.

A gas boiler also has a limited lifespan and will need to be replaced at some point.

A charging station (wallbox) does not require internet—maybe that will change in the future. One car gets updates installed at the workshop, and the new ones receive them over the air because they have built-in SIM cards for all their live data.

Stadtvilla19 schrieb:

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

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

And how does the charging station know to charge the car because the sun is shining? You need a connection between the photovoltaic inverter and the charging station, usually via LAN nowadays. You won’t really be able to charge from your battery storage. Neither the capacity nor the power output is sufficient. Is your battery storage three-phase?

Do you also have controlled residential ventilation? I find the electricity consumption quite low for a modern single-family home with a granny flat. With an electric car, of course, the electricity demand is higher…

I won’t comment on this power-sharing community concept. It’s like solar power.

No offense, but overall this sounds more like you’ve fallen for the marketing hype.

A battery storage system does not pay off today because the purchase, maintenance, and servicing costs are higher than just buying electricity continuously. That’s what I meant by a total cost of ownership (TCO) analysis…

Also, OTA updates usually run over Wi-Fi. Only minor updates run via cellular network.

The CO2 tax is for the “Greta followers.” It has nothing to do with scarce fuel resources. You are not even 30 yet. But do you know how often oil was supposed to run out already?

I’m not much older, and resources should not be wasted, but much of what you’ve written here seems like half-knowledge.

What KfW efficiency standard does your house meet? KfW 40+?

That doesn’t pay off over your lifetime either…

Insulation made from biodegradable materials?

I’m out here. The whole picture doesn’t add up. Wanting to use HomematicIP without the basic networking knowledge. Also, no electrician involved.

No insight either. As you wrote yourself, it’s more about just having a house.

No real data about the house has been provided either.

Good luck anyway.

You are so cool here

When I say I’m old-fashioned and don’t need an Ethernet port in every room, people argue that I’m not thinking about the future.

But when I want modern heating technology, they say, “Use gas, it has always been the best…”