ᐅ What annual electricity consumption should I specify in the energy contract?

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

- Air-to-water heat pump with an outdoor unit for underfloor heating
- Exhaust air heat pump with a 200-liter (53-gallon) water tank for domestic hot water
- 150 sqm (1,615 sq ft) of usable space

When setting up the new electricity contracts, I would indicate 3000 kWh for household electricity (which has been roughly the consumption so far). For the heating electricity, I am unsure. I was thinking of 5000 kWh. Do you think that will be enough, or should I set it higher from the start? There are many varying reports on the consumption of such systems, so I prefer to estimate on the higher side to avoid unexpected additional charges.

Regarding these special heat pump tariffs with time-of-use restrictions, has anyone experienced the problem of suddenly running out of hot water while showering?

Thank you in advance.
Florian

That is definitely enough for starters 🙂

I would check the heating load calculation to see what it indicates. You can use it as a rough guideline; it will likely be lower. 5000 is a bit much...

The heating load calculation shows 5 kW. If I multiply this by an assumed 2,000 operating hours and divide by the annual performance factor, that would result in approximately 5 * 2000 / 3(4) = 2,500 (3,400) kWh.

However, the calculation does not take into account the exhaust air heat pump for the domestic hot water at all.

In the first year, we consumed 4260 kWh (KfW70 standard, air-to-water heat pump, 154 m² (1657 sq ft), 4 people).

@Bieber0815 Does that include the heating-up program?