Photovoltaic system air-water heat pump - profitability single-family house KFW55EE

Basically, Hangman's statement about qP matches mine. I guessed 2, Hangman 1.6. On the internet, you can repeatedly find 2.7 for electricity. That then neatly results in 3500kWh. ;-)

The 2.6 was valid until 2019/20... then the heat pumps were changed to 1.6 to promote them more strongly (that’s what I meant by politically motivated). I don’t know if there have been any further changes since then (but I don’t think so). However, it doesn’t matter, since in calculations the final energy demand should be explicitly stated (regardless of which factor).

Thank you, I had also just read about the factor 1.8. The question is anyway whether usable area or living area is taken into account.

If you go to the official website of the heat pump manufacturer, select my air-to-water heat pump and enter all the info (living area, KFW standard, usage behavior, PLZ etc.), the following results for me:

Total heat demand including hot water: 10592kWh/pa.
Corresponds to a total electricity demand of 3130kWh/pa. (space heating, hot water, ventilation).

I will probably just calculate with 4500kWh, then I am between the two calculations.

If it is more than 3000, something is not right. 5000 is enough for me for 260 sqm uninsulated old building, NAT -10° and 22° RT.

this is how a new house with the appropriate photovoltaic system is fun. :cool:

That's how a new house with the right photovoltaic system is fun.

I can only agree - and that in winter. It will get even better on the weekend: