Floor plan design and offer single-family house approx. 180 sqm

that I haven’t seen a problem so far when the toilet and tub have the slope at that height?

For pygmies of the size of an Alfred Tetzlaff no problem. A normal or even extra tall person stands up from the tub and hits their head. You do that twice, then you’ve learned – and that’s exactly the problem: (unconscious) avoidance posture, awkward straightening up, chronic massage prescription.

Did you actually want to hear/read opinions about the floor plan now or just bring up your photovoltaic system?

Did you actually want to hear/read opinions about the floor plan now or just bring in your photovoltaic system?

No, on the contrary. Very happy to get feedback on the floor plan. Bathroom arrangement and pantry are clear.