KFW55 House Funding Program 153/wrong values due to experts?

Hello everyone!

Happy New Year still

I have written to both by registered mail and received a reply shortly after.

The expert has corrected the "error" and created a new online application.

Thank you all.

So first of all, I agree with the construction expert - the alarm bells should have been ringing earlier. But the waters seem to have calmed and everything appears to be back on an orderly course.

There is a difference whether there is photovoltaic or not. Photovoltaics will cause additional costs in 5-10 years at the latest (new inverter, etc.). A "better" brick does not cost money in 10 years. The appearance is also quite different. For me, this would be a significant difference. Maybe the OP wanted to have a new roof window installed on the south side in 5 years - then he can no longer do that. Something like that must/should be discussed beforehand???

If it had been photovoltaics at a "zero cost," in my opinion, the future costs of inverter replacement could easily have been absorbed. You would not have paid anything for the acquisition and installation and still produced electricity that you could consume yourself (20-30% of self-consumption should be coverable) or sell at the unfortunately now low tariffs. Since heating and hot water are produced here with a heat pump, the energy demand of the pump could also have been covered to a (large) part during the spring - autumn period (only a small part in winter).

I think these savings at "zero cost" would have brought the OP quite a bit in the long run and more than offset the future maintenance costs (my opinion).

So first of all, I agree with the construction expert – the alarm bells should have been ringing much earlier. But it seems the dust has settled and everything is back on track.





If it had been a photovoltaic system at "zero cost," in my opinion, the future costs of replacing the inverter could easily have been absorbed.
You wouldn’t have paid anything for the purchase and installation and still produced electricity that you could consume yourself (20 - 30% of self-consumption should be coverable) or sell at the unfortunately now low rates.
Since heating and hot water production is done with a heat pump here, the energy demand of the pump could also have been covered for the most part during spring to autumn (only to a small extent in winter).

I think these savings at "zero cost" would have brought the OP quite a lot overall and more than offset the future maintenance costs (my opinion).

Yes, I agree with you. I didn’t want to question that either. My point was that a photovoltaic system should only be installed on the roof as a conscious decision and not just because an expert made a calculation error.