ᐅ How to Achieve KfW40 Standard? Energy Systems and Cost Efficiency
Created on: 29 Dec 2020 22:25
S
Sascha1977
Dear experts,
We have just been very lucky and managed to buy the last available plot in the town of some friends. Now we are building a small house for our parents with a trusted general contractor who built our house 10 years ago. Unfortunately, we are still laypersons and would therefore like to ask for your opinion, especially regarding energy technology, at this early stage of our planning.
A brief overview of the house, plot, and occupants:
Our questions:
Please excuse the many questions and our lack of knowledge. We would be very grateful for your answers so that we at least avoid major mistakes.
Kind regards
We have just been very lucky and managed to buy the last available plot in the town of some friends. Now we are building a small house for our parents with a trusted general contractor who built our house 10 years ago. Unfortunately, we are still laypersons and would therefore like to ask for your opinion, especially regarding energy technology, at this early stage of our planning.
A brief overview of the house, plot, and occupants:
- New build, 11 x 7.25 m (36 x 24 ft)
- 2 full stories
- Gable roof with 25 to max. 30 degrees pitch (approx. 91 m2 (980 ft2) roof area)
- Gable roof oriented east/west
- No bay windows, maximum one double casement window, shading otherwise only by satellite dish
- Ground source heat pump with deep drilling
- The Tecalor TTC 07, which does not seem popular in this forum, is decided on (funding applied for at the last minute; the general contractor installs it regularly)
- Decentralized ventilation system
- Underfloor heating
- Aerated concrete with external thermal insulation composite system (ETICS)
- Utility room will be max. 8 m2 (86 ft2)
- 3-person household
- Energy consumption spread throughout the day (retired occupants)
Our questions:
- We would like to achieve KfW40 standard. Which measures do you suggest or consider essential?
- We have read very positive reports on the economic efficiency of photovoltaic systems with east-west orientation on flat roofs. How do you assess this in relation to our gable roof with a maximum 30-degree pitch? Is 25 or 30 degrees better?
- Does adding a storage system make sense?
- Are there any module manufacturers you would particularly recommend?
- Can you recommend an energy consultant and/or an expert for photovoltaic system installation in the Ruhr area/Sauerland?
Please excuse the many questions and our lack of knowledge. We would be very grateful for your answers so that we at least avoid major mistakes.
Kind regards
N
nordanney2 Jan 2021 17:39pagoni2020 schrieb:
Do you still have details regarding the above statement that if you apply for something like KfW 40 Plus, you are NOT allowed to claim another subsidy, for example, for energy storage (in our case, the state of Saxony)?No, I don’t know that for sure. But with KfW, it is generally stated that double funding is not allowed. For example, here in NRW, I can have my wallbox subsidized either by the state or by KfW. You cannot receive both at the same time.
I also can’t imagine that double funding is accepted anywhere.
K
knalltüte2 Jan 2021 17:46Regarding double funding, I believe (but I’m not completely sure) that at least the overall construction is subsidized with KfW40+ standards (which requires a battery storage system), but an additional subsidy for the battery storage of 200€ per kWh is still possible (here in NRW). At least all the applications have been submitted and approved! However, double funding is definitely not possible for wallboxes.
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pagoni20202 Jan 2021 17:53superzapp schrieb:
Additional subsidy for battery storage at 200€ per kWh is possible (here in NRW).It seems to be the same in Saxony. We'll see...Similar topics