ᐅ Building a House According to the Energy Performance Act: Still Acceptable or Better to Aim for KfW 55 Standard?

Our general contractor primarily builds according to the current energy-saving regulations, and the additional cost for KfW 55 was significantly higher than the subsidy in our case.

Since I am allowed to build according to the energy-saving regulations, I am not doing anything prohibited. Our successor can then upgrade the house energetically to meet the standards required at that time.

We are having the preparations for photovoltaic systems done now, as it would probably be difficult or very costly to implement later.

Yaso2.0 schrieb:

Our successor can then upgrade the house to meet the energy standards that are required at that time.

This is exactly where I see a strong argument
- in favor of the "future standard" if the house will be put on the market in a few years, or
- against the "future standard" if it would already be considered "outdated" when the house is sold.
For example, assuming that with the upcoming end of funding for KfW55, the Effizienzhaus 55 standard becomes mandatory by 2025, then a later owner buying around 2050 or 2055 would likely need to upgrade the house to the Effizienzhaus 55 level. For a buyer in around 2050 or 2055, it will probably matter whether the house meets the Effizienzhaus 55 (KfW55) standard or the Effizienzhaus 70 standard (Energy Saving Ordinance 2016 / Building Energy Act). A subsequent owner in about 2030 might notice the difference, possibly in their wallet, but not yet as a mandatory upgrade. This line of thought assumes that Greta will not become a career politician and meet Annalena too often – otherwise, this could happen sooner ;-)

So, the question of whether to adopt a near-future standard already now applies to houses much like it does to cars: if you plan to replace it after three years, add-ons that "many people find great, but aren’t very important to me personally" might influence the value; if you intend to keep it for about twelve years, the emphasis shifts accordingly.

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Yaso2.0 schrieb:

We are having the preparations for photovoltaic installed, as it would be difficult or very complex to implement later on.

How exactly did you prepare for the photovoltaic system?
We are currently building our house. Starting tomorrow, the screed will be heated according to the schedule. We might move in around February. Our photovoltaic system with 13.7 kWp is completely installed on the roof. I organized most of it myself: first I did extensive research, then I purchased the modules—exactly 36 units on one pallet (all-black modules on black roof tiles). At the same time, I was in contact with a solar technician. Some time later, I bought the mounting frame (the solar technician provided me with the parts list). After the roofing work was completed, the roof inspection with the general contractor took place. Immediately afterward, the solar technician did his work, using the scaffolding provided by the general contractor. The inverter will be installed in early January, followed by commissioning. My photovoltaic system cost about 14,000 euros gross / 11,800 euros net in total. Our KfW Efficiency House 55 EE will have an air source heat pump. Due to the low costs, I expect no electricity expenses for household and heating over a period of 20 to 25 years (factoring in feed-in tariff payments).

For example, we installed two slightly thicker empty conduits from the utility room to the attic. This was enough to pull the three strings down to the inverter. We also ran a network cable from the inverter to the distribution box (switch). This allowed the photovoltaic system to be activated after the utility room floor was completed.

Mahri23 schrieb:

For example, we installed two slightly larger empty conduits from the utility room up to the attic. That was enough to pull the three strings from the roof down to the inverter. Then we also ran a network cable from the inverter to the distribution box (switch). This allowed the photovoltaic system to be activated after the utility room floor was completed.

Empty conduit is also available, and the house electrician installed an equipotential bonding connection in the attic. He connected the satellite system there, among other things, and the equipotential bonding for the mounting frames will also be installed there.
I have also been considering the timing of the commissioning, especially since the screed will be heated electrically starting tomorrow. The expected electricity consumption will probably be around 1000 or 1500 kWh. The heat pump is still missing.

Hausbau 55 schrieb:

How should I imagine your preparation for photovoltaic systems?

Like this here

Mahri23 schrieb:

So, for example, we installed two slightly thicker empty conduits from the utility room up to the attic. That was enough to pull the three strings down from the roof to the inverter. Then we also ran a network cable from the inverter to the distribution board (switch).

And as far as I remember, there was also a field expansion in the distribution board.