Construction costs are currently skyrocketing

Please also immediately install cable ducts (or the cables themselves if the planning is complete), keep the space in the fuse box free, and also plan for mounting space for the inverter.

perhaps a compromise solution is sensible in such cases:
during the roof construction, common mounting anchor points are installed directly.
They then do protrude between the roof tiles, but really don’t bother anyone.

But later, after clarification of finances and market situation, the photovoltaic panels will be purchased and installed.

This way, all options remain open with only marginal additional investments
during the house construction phase.

We are leaving "prepare for photovoltaics," whatever that means. As soon as the storage units become more affordable, we will upgrade. And when we have more confidence in heat pumps, we will switch over. We are aware that it will be more expensive afterwards, but we are willing to pay that then. It may sound borderline stupid and certainly not coherent now, but considering the complexity of building a house, our age, and health condition, a simple solution that we can roughly understand, know, and operate was important to us. Considering our extremely low CO2 footprint, we consider this responsible for the time being. The renunciation of a gas fireplace stove hurt us quite a bit for atmospheric reasons (well, that now benefits the environment), because we didn’t understand the LAS system in that regard either (apparently every provider has a different one?!). "Simplicity" sometimes has its advantages too. ;-)

The renunciation of a gas fireplace stove for atmospheric reasons really hurt us

Bad for the atmosphere in the living room, but good for the atmosphere outside ;)

We are having "photovoltaics prepared," whatever that means. As soon as the storage systems are more affordable, we will upgrade. And when we have more confidence in heat pumps, we will switch. We are aware that it will be more expensive in the long run...

Preparing photovoltaics is basically OK. However, you should mentally prepare for the possibility that it will still need to be implemented in the short term (possibly even during construction). I firmly believe that the new government will do something about this (ideally a mix of carrot and stick, and then you should look at the carrot).

You really should reconsider the "plan" to install gas first and later switch to a heat pump. You have to pay now for a gas connection and chimney that you actually don't need at all. And what is supposed to give you confidence in heat pumps? These things have existed for decades and are already around you, for example disguised as refrigerators.

We are having "prepare photovoltaics"

Find out what that means and then what the Solarfuzi normally needs!
We also paid for a preparation, unfortunately completely useless for the solar installer because it is undersized.
Now it just goes down the facade :rolleyes:

Find out what that means and then what is normally used by the solar guy!
We also paid for a preparation, unfortunately completely useless for the solar installer because it was underdimensioned.
Now it has to go down the facade :rolleyes:

What was that with you that it was underdimensioned? We also had it prepared and after I read here several times about 2x50mm conduit, I was quite worried because only 1x32mm was laid at our place. But that was perfectly sufficient for our solar installer.