Construction costs are currently skyrocketing

I don't quite know what you want to tell me? Maybe I didn't understand it, my statement only referred to the one from , that chemistry would pay better than automotive. I doubt that.

Oops Yes, metalworkers earn somewhat higher. Chemistry is always in 2nd-3rd place.

We actually now have the first partial offer for our EG renovation. About 100€/m2 for laying and connecting the underfloor heating. Only the installation of the thermostats is not included. And for the solar thermal system 10,200€ all inclusive. Domestic hot water + heating. I think these are normal, acceptable prices. And the structural engineer charges 62€/h, which is also normal according to my research.

Hi, I quickly compared it with our prices from 2019: All prices net, and with connection by a specialist company. (Bavaria) Solar system 5 sqm with 300l storage - 4600€ Underfloor heating with insulation 210 sqm - 10,500€ Gas boiler with all connection gear and LAS chimney - 5000€ In hindsight, I found the underfloor heating expensive because for plumbing it is "no" work... We could have done it ourselves.

We actually have the first partial offer for our EG renovation now. About 100€/m2 for laying and connecting the underfloor heating. Only the installation of the thermostats is not included. And for the solar thermal system 10200€ for everything. Hot water and heating. I think these are normal, acceptable prices. And the structural engineer charges 62€/h, which is also normal according to my research.

10k for solar thermal, which you'll have to tear down again anyway to install photovoltaic later, I (!) don't find a sensible investment. Save yourselves that and go for heat pump and photovoltaic later when it makes financial sense. The solar thermal system is already half the price of photovoltaic. Think it over again, we all only mean well. Thanks to underfloor heating, a heat pump will also work without any problems.

That will be quite a large solar thermal system that can still support the heating well in winter. I seriously doubt that it won't be worth it.

If he renovates the heating now, he will hardly switch to heat pump+photovoltaics in the next 10-15 years.

So please invest in solar thermal and save a lot of fuel and money over the next 10-15 years.
That makes much more sense than a photovoltaic system, because hot water can be stored cost-effectively.

This heat pump and photovoltaic hype here in the forum is really annoying sometimes.
If you only know a hammer, you see every problem as a nail, right?

In hindsight, I found the underfloor heating expensive because it's "no" work for plumbing... We could have done it ourselves.

That would always be worth it to me for the transfer of the warranty risk. The water damage from a neighbor's leaking underfloor heating is warning enough for me. :D

That will be quite a large system, which can still support the well even in winter. I strongly doubt that it’s not worth it.

If he renovates the heating now, he will hardly switch to heat pump + in the next 10-15 years.

So please invest in solar thermal and save a lot of fuel and money over the next 10-15 years.
That is much more sensible than a photovoltaic system, because the hot water can be stored cheaply.

This heat pump and photovoltaic craze here in the forum is really annoying sometimes.
If all you have is a hammer, every problem looks like a nail, right?

In winter, when it’s dull and gray^^
Enjoy.

My photovoltaic system is at zero after almost 7 years and then it really takes off;-)