Construction costs are currently skyrocketing

"One" in the sense of "I" really hopes for that. I cannot understand this whining from you and other builders. You can perceive it as "pushing it down your throat," but please realize that building is the ultimate luxury and the photovoltaic system is probably the only trade that pays for itself.

Retrofit within x years from the building’s occupancy might still be a solution. Or do you think the photovoltaic company, the good Samaritan, thinks "oh, they have to install photovoltaic... I won't charge extra because the contractor is under pressure and has no other choice." And where is the material supposed to come from when even now, without an obligation, you either get no offer, one with sky-high prices, or installation in 2 years? As CL likes to say, "the market will regulate it." High demand with low supply... You surely know what that results in all by yourself?

Exactly me, a luxury-living egoist who wants to build a house with the money earned instead of throwing it down the throat of someone who owns several properties and lives in a villa themselves... How could I...

Back again to the photovoltaic obligation. What happens if the photovoltaic system is only available in 20+ months? Apart from the price. Does construction have to be halted or can you already move in? I am also in favor of a photovoltaic obligation, but how is this supposed to be implemented if there is a material shortage? This will surely last a while longer (Covid policy in China, war, etc.). And demand will inevitably increase due to the obligation. How does the implementation look like in reality then?

In BW it is regulated as follows:

§ 10
Prüfmaßstab
Building owners must ensure [...]
If there are indications of a failure to fulfill obligations, the competent authority may subject the construction project to an on-site inspection. If a failure to fulfill obligations is determined, the competent authority will point out these obligations to the building owner and set a reasonable deadline for their fulfillment.

Essentially, it will initially come down to hints from neighbors or random inspections by the building authority.

In BW it is regulated as follows: Essentially, it will initially come down to tips from neighbors or random checks by the building authority.

Thanks for the info. Then let's hope that the authorities adjust the appropriate deadline to the market conditions.

I suspect that it does not affect the construction but rather concerns deadlines penalized with fines.

We also have a photovoltaic obligation in this area, and for years there have been builders who don't care about it ... who even checks that anyway. If you place an order, in my opinion it should also be clear that nothing has been overlooked.

By the way, I don't believe in permanent material shortages. The expansion in Germany is not particularly relevant in the world market. Maybe the inverter isn't made by SMA, so what.