ᐅ Floor Plan of a Narrow, Rectangular L-Shaped House on a Triangular Plot with an Oak Tree

Great, great, great... I also had a tree outside my window as a child... and I don’t remember much, but I do remember the branches tapping against the window and the rustling of leaves in the wind. Ah.
Yes, you might need some light – but with the current summers, for me the advantage of shade clearly outweighs that.

Any updates? Photos would, of course, be a dream.

Yes, although progress is quite slow. The interior plaster and screed are completed. Tomorrow we will finally continue with the exterior facade. I will share photos later.

A quick question for the technical experts here...

We switched from gas/solar to a heat pump during construction. It really only makes sense with a photovoltaic system, though. At the moment, we don’t have the budget for that. However, before all the holes, chases, shafts, and so on are closed up, I’d like to at least run the cable to the roof. Is there a standard cable for this, or does the cable size depend on the size of the photovoltaic system? Speaking of size: What capacity should the system have for an 8 kW heat pump and an electric vehicle charging point in the garage?

Typically, photovoltaic systems use cables with a cross-section of 4mm² (0.006 square inches). The system size should either be around 9.99 kW or 12, or preferably 13 kW or more. The reasons for this can be found in many sources (renewable energy surcharge). Especially for an electric vehicle, the system can hardly be too large, since there is significantly less energy yield from the roof in winter anyway. It is best to obtain a few quotes in advance and have the preparations done by an electrician.

6mm² (10.5 AWG) is standard, quantity depending on strings, roof surfaces, etc.