ᐅ How to upgrade from KfW55 to KfW40+?

Hello,

to my surprise, we managed to hit the target exactly with our house planning for KfW 55. Since the repayment subsidies became more attractive from 04/01/16, I also took a look at KfW 40/40+.

Roughly about the house:
Single-family house with approximately 138 sqm (1,485 sq ft), basement for utility rooms, ground floor, and attic. Gable roof with 18°. Monolithic construction with controlled residential ventilation and an air-to-water heat pump.

The KfW 40+ information sheet states:
- A renewable energy-based power generation system
- A stationary battery storage system (electricity storage)
- A ventilation system with heat recovery
- A visualization of power generation and consumption via an appropriate user interface

So, would a photovoltaic system with battery storage possibly be enough to qualify for KfW 40+?
With a 15,000 € grant, that wouldn’t be a significant additional cost.

Best regards,
dsin8788

your architect knows that............

Hi,

I think first you need to reduce from 55 to 40 and then install the Plus Package.

That means lowering Q_p and H´_T from 55 to 40 and from 70 to 55, respectively.

Whether this is possible afterwards is uncertain; you really need to consult the builder of your house or your architect. Personally, I believe a) it is not that simple, and b) it will probably cost a considerable amount of money if it is possible.

What you listed seems to be only the scope for the Plus Package.

Best regards,
Thorsten

KfW-Efficiency House 40 Plus 40 55
QP in % QPREF 40 40 55
H’T in % H’TREF 55 55 70
Additional requirement. Plus Package

Hello Thorsten,

T21150 schrieb:

I think you first have to reduce from 55 to 40 and then install the Plus Package.

No, not really.

Actually, it's sufficient (assuming the single-family house is not being built on the Kahlen ASten) to have the photovoltaic system* with storage as described by the original poster.

Edit: *of adequate size. The required size is calculated by the specialist planner.

Best regards, Bauexperte

Bauexperte schrieb:
Hello Thorsten,


No, not really.

The photovoltaic system with storage described by the original poster is actually sufficient (as long as the single-family house is not going to be built on the Kahlen ASten).

Regards, Bauexperte

Not a bad thing. Then I must have looked at the wrong documents.

That would be ideal for the original poster.....

I have read the information sheets from the KfW and came to that conclusion. However, I am not familiar with the details. If this might be relevant, I would first learn a bit about photovoltaic systems before receiving the exact statement from the energy consultant.