Experiences with brine heat pump

Yes, of course....

August
4 people, 190 sqm living area, KFW55 Energy Saving Ordinance 2014
Heating: 3 kWh electricity (I believe one of those is due to the failed cooling attempt)
Water: 26 kWh electricity
Household electricity: 136 kWh electricity

I can only tell you the average water consumption... 62 m³ since mid-February - so about 10 m³ per month. I have set 30 minutes in the morning when it is allowed to heat. 180 L. Yep, I read from the heat pump - but also from the meters simultaneously - on 07/31 the sub-meter for heating showed 5412.68 kWh and on 09/01 5442.02 kWh. At the same time, I also read the main meter.

OK, she can heat whenever she wants with me and for as long as she wants - I still don't know exactly how to regulate that...

She needs 2 kWh a day for that - according to colleagues, completely fine. It's 400l, but they are not needed every day. But generally, showers are longer, and she heats up again shortly after showering.

47 degrees and hysteresis is at 9 degrees.

Of course the tank loses heat - who says otherwise?

The other day I insulated all the exposed connections

The Vaillant technician who conducted the acceptance for the warranty said that the heat loss was minimal and that the tank also retains its heat for 2 days... as if.