Is preparing for photovoltaics in new construction sensible?

If you are still in the planning phase, I recommend planning a media shaft of about 20 x 40 cm from the attic to the basement or technical room. That’s how I did it. Accessible behind a cladding on each floor. Whatever may come.

After I read this thread here, I spontaneously said on Friday during the electrical sample inspection that we would like to have the preparation for photovoltaic offered.

The offer now states:

1 pc.
Preparation for photovoltaic system (connections from house connection to attic without connections of the cables)
Empty conduit DN32 110 €

Extend the meter cabinet by one distribution field to be able to accommodate more components of the electrical installation
450 €

Is that sufficient?

... Is that enough?

No! DN32 is (clearly) too small! At least DN50.

No way! DN32 is (significantly) too tight! At least DN50.

Silly question, but how does he then come up with DN32, he has seen the house plans.. And then only 1 x DN50 or do there have to be several:oops:

I have around 21kWp on the house roof with 4 strings. Then there are 4 x each DC and control cables as well as one or two grounding cables. So I have about 5 empty conduits DN32 there.

I have about 21kWp on the house roof with 4 strings. Then 4 x each DC and control cables as well as one or two grounding cables come in. So I have about 5 empty conduits DN32 there.

Mine was pretty much very spontaneous after I read the thread here, I wouldn't have thought of it before..

Does it depend, for example, on the house size or orientation? Maybe I should familiarize myself with the requirements beforehand..

Who advises you in such a case? And do I basically have to set up some device later or something? I wouldn't have any space for that..