What annual consumption should be specified in the electricity contract?

Hello,
we will have two separate meters. One for the normal household electricity and one for our heating system. This consists of:

- Air-to-water heat pump with external module for the underfloor heating
- Exhaust air heat pump with 200-liter water tank for domestic hot water
- 150 sqm usable area

When concluding the new electricity contracts, I would specify 3000 kWh for household electricity (which has also been consumed in this range so far). For the heating electricity, I am unsure. I was thinking of 5000 kWh. Do you think that is enough, or should I set it higher right from the start? You read very different information about the consumption of such systems, so I prefer to set it high to avoid high additional payments.

With these special heat pump tariffs with blackout periods, has anyone ever had the problem of suddenly having no hot water while showering?

Thank you very much in advance.
Florian

For starters, it's definitely enough :)

I would look at the heating load calculation to see what it says, you can roughly estimate, it will certainly be less. 5000 is a bit too much...

The heating load calculation states 5kw. If I then multiply that by an assumed 2000 operating hours and divide by the annual performance factor? That would correspond to approx. 5*2000/3(4) = 2500(3400) kwh. However, the calculation does not take the exhaust air heat pump for the hot water into account at all.

We consumed 4260 kWh in the first year (KfW70, air-water heat pump, 154 m², 4 people).

Is the heating program included in that?