Operate heat pump autonomously with photovoltaic system.

I just stumbled upon this post.
Do you really think that in 20-30 years anyone will still care about which energy standard a building was constructed to?
I think the question will (as it is currently) not be asked and will not have a strong impact on the achievable price of the property.

Hi!

Thank you very much for your words.

I think you are quite right regarding the 20-30 years.
Only when I see that from 2021 onwards only passive houses are allowed to be built, I suspect that people do care about the energy standard.

Whether this will significantly affect the purchase price: I cannot judge. In 30 years, I will also care relatively little. I will be 80 then, and I (childless) don’t need to accumulate wealth anymore.

I suspect that this will still be an interesting factor in the next 7-12 years. But: we shall see.

Thanks again and best regards
Thorsten

Hi!

Thank you very much for your words.

I think, regarding 20-30 years, you are quite right.
Only when I see that from 2021 onwards only passive houses are allowed to be built: I assume that people are already interested in the energy standard.

Whether this will have a significant impact on the purchase price: I cannot judge. In 30 years, I don’t really care. I will be 80 then, we (childless) don’t have to accumulate wealth anymore.

I suspect that overall this will be an interesting factor in the next 7-12 years. But: we will see.

Thanks again and best regards
Thorsten

Well, I can only speak for us. We looked at a few used properties. They were also advertised to us as very energy-saving. But the bills showed something different. In the end, we decided on a new build in Kfw 40. So, for us, efficiency was decisive. But I think it’s different for everyone.

I will work on this soon and gladly post the link here. It’s more worthwhile now than ever...

So - I have had photovoltaics + (a small storage, just what fit into the utility room) for 5 weeks now.
Because I think it’s good. It works absolutely excellently.

At the moment: it simply doesn’t pay off (in a way that blows you away). Doesn’t matter, because I wanted to have something like this. Absolutely. Gut feeling.
Currently, it’s enough for me to break even with the costs of electricity from the grid. I think that’s about right, apart from +/- 10 euros per month.

I also share (intuitively) your view that we will see 40ct/kWh in the very near future. Reasons:
- Coal phase-out
- Nuclear plant shutdown, dismantling, final storage
- Grid expansion (DC grids, local grids)
- In about 5 years, replacement constructions for many wind turbines will be due, and in 7-9 years for the first large solar plants
- and much more... We’re talking about several hundred billion euros in total costs over the next 15 years (gut estimate). Of course, this will be passed on to consumers.

You may not post a link here.

Please be so kind as to send me the link via PM. I am very interested in the topic and also in exchanging ideas about it. Thanks.

Best regards
Thorsten

By monthly costs I mean either the loan portion or, if self-financed, the depreciation.

The additional costs have to pay off.

And where does the repayment subsidy come from? Probably from the [KFW153], but then you also have to calculate the additional costs for insulation, heating, etc. Or from the subsidy for the storage... then I am surprised by the own "electricity price".

If your own kWh costs 27 cents, does that already include VAT and the taxation of the free-of-charge value transfer from the commercial operation?

Furthermore, you mentioned only 200 euros electricity costs per year... your own electricity also costs you something. (see above)

I stick to my statement, especially since I also calculated my system in January.

Hello everyone. I am also currently planning a house construction. For me, the question arises whether I should build a KfW efficiency house 55 or take the normal standard or meet it. The house is to be built in the town villa style. That means - two full floors, - without a basement, - external dimensions approx. 10.5x10.5m, - ground drilling not possible due to rocky subsoil! Does the additional effort (higher costs) for different insulation, heat pump, and photovoltaic system pay off through the relatively cheap KFW loan and the subsidy? (100,000€ at about 1.3 percent over 20 years) Can one even say that in general terms? It would be nice to hear one opinion or another here. I am also grateful for tips.

From my own experience, I can say that it does not have to be binding that a bank approves you for a KFW loan. For example, our bank rejected the KFW 124 so that we could be financed at all. Furthermore, our request for the KfW 153 for 10 years at 0.75% was also rejected. We had to take the 1.5% for 20 years.

Whether KfW 55 is worthwhile in the long term, you have to decide for yourself. Calculate it over 30-40 years and see how much you can save on additional costs considering all expenses, maintenance, repairs. I think it is always advantageous to build for the future. In 30 years, our KfW 40 Plus will certainly sell better than a KfW 70.