KFW40 or better in solid construction, possible without additional insulation?

The photovoltaic system does not change anything about the kWh,...

Then I would check the electricity meter something is definitely not right, good for you!

There is probably a photovoltaic system involved...

Yep, but zaba also has one I think

Hello

Where is the problem with the desired KFW standard?
With blinds, air space, home automation/KNX, dressing room, children's bathroom and the like, there are objections about whether it makes sense on this scale – never. And there isn’t a single thing that pays off, all are things that will cause additional costs for maintenance and care in the future.
Those who insulated their roof with 140mm glass wool more than 30 years ago and sealed the joints with aluminum adhesive tape were also told at the time that it was nonsense and would never pay off. Double glazing was also completely fine not so long ago. Who still builds something like that in their new build today?
Why not build one step ahead of the current standard?

I still enjoy our "Kfw 40 insulation" after 4 years and will of course build the new house also as KFW40, simply because I enjoy it and want it that way, even if it is only rented out.

Olli

The photovoltaic system does not change anything about the kWh,...

Yes, that depends on the interpretation, but basically you are right. I didn’t have the number ready but it is more around 1200. That’s why, in the end, it’s also "fun".

KFW 40 already begins with the planning of the floor plan. Avoiding front and rear projections, dormers, bay windows—in other words, a good A to V ratio—already helps a lot and reduces construction costs.

The photovoltaic system does not change anything about the kWh,...

If the 500 kWh refer to the reading on the consumption meter, probably yes