How much house is in it?

Ah okay, very good. Thanks to you. That’s roughly what I had already thought, that KNX doesn’t really pay off that much more considering the costs. Everyone can do with Alexa and co. as they please. I always think that the respective authorities (whether German, American or Russian) already know everything about me that they want to know. And I dare to doubt that I am that interesting to them

I only said that I don’t want any KNX, but I also don’t use Alexa, Homekit, Bixbi, Siri etc. I just want to point out that these things are not only a data protection problem, but also bring security vulnerabilities into your house. In any case, I would never connect a window or door opener with something like that.

Again:
- Photovoltaics without storage at 9.9 kWp costs about 14k€. With sufficient storage about 25k€
- You can’t do terrace + driveway at all because you don’t know how! Or have you ever laid curbstones including foundation and mineral concrete + gravel with paving stones? So don’t write such nonsense and calculate 20k€ for it
- If you mean a double rod fence, no way

Photovoltaics currently cost around 1000 euros per kW-peak (pure material costs), for safety reasons I would advise against Li-ion batteries. Let the product first mature in the market – there will still be one or another house burning down until the residual risk goes to zero.

But a terrace is not rocket science, even an ordinary person can do it. Somehow these days, there is widespread mania for big garden landscapers everywhere, although this is where you can save the easiest. In the entire building area of my parents (80s) there was only one “exotic” who did not do the outdoor area himself.

Photovoltaics currently cost around 1000 euros per kW-peak, and for safety reasons I would advise against lithium-ion batteries. But building a terrace is not rocket science; even an ordinary person can manage it. Somehow the big garden landscaper craze has broken out today, although this is where you can save the most easily.

@Photovoltaics: Net price I agree with you, if you mean gross price then rather only polycrystalline 265w modules

@Terrace: I agree with you. Saving potential very high. Risk of herniated disc also. But if you have never done it before, you also risk having to look at poor workmanship for a long time. By the way, this also applies primarily to tiles, because they are not so easy to tear out.

@Photovoltaik: I agree with you on Netto, if you mean Brutto then rather only polycrystalline 265w modules

I just added that. I only meant the material (monocrystalline), the installation of course also comes on top and is not cheap plus mounting material...

I am also amazed that there are people who save up to 50,000€ on the house in order to get a great garden/terrace area.

Point foundations in the dirt, beams laid on top, terrace boards screwed on with 1cm spacing, a bit of wood protection in between, done. Costs next to nothing and you have peace for 10 years. Then you can still decide whether it should be a fancy convertible or finally the long-missed professional terrace.

...and as has been written here several times before, you also have to be aware of what you can realistically manage time-wise... It always sounds very good when you say, I enjoy doing things myself and can also save money... but you also need to have the time... and quite a few other points (longer construction phase, possibly more expensive material purchase, necessary tools, liability/warranty, etc.) One can certainly save quite a bit... but in most cases not as much as you initially think.

I am also surprised that there are people who save up to 50K€ on the house to get a great garden/terrace area.

Point foundations into the dirt, put beams on top, screw terrace boards with 1cm gaps onto them, apply some wood protection in between, done. Costs next to nothing and you have peace for 10 years. Then you can still decide whether it should be a fancy convertible or finally the long-missed professional terrace.

Because SAP developers are born craftsmen, you think? :-p