ᐅ Heat Pump / Final Energy Demand / Annual Performance Factor?

Hello everyone,

I already have several energy performance certificates showing that for KfW55, a final energy demand of about 17 kWh/m²a (5.2 kBtu/ft² per year) has been calculated. This corresponds to an annual final energy demand of 2550 kWh/a (8700 kBtu/year) for a heated area of 150 m² (1615 ft²). The insulation, air-to-water heat pump, etc., also match my planned new build in timber frame construction. Here are my questions, as I feel a bit stuck:

1.) Has anyone had experience with similar figures and can confirm that these calculated values are realistic in practice?
2.) Can these numbers really be accurate, that only 2550 kWh/a (8700 kBtu/year) are needed? With electricity costs of €0.22, that would be only €560, and heat pumps produce more kilowatts of heat per kilowatt of electricity consumed.
3.) How exactly are the seasonal performance factors (seasonal COPs) calculated based on this final energy demand?
I have different seasonal performance factors for various heat pumps. I want to calculate the annual electricity demand in order to estimate running costs and assess from when a ground-source heat pump becomes worthwhile.

Split heat pump: 3.34
Monobloc heat pump: 3.67
Ground-source heat pump with horizontal loop: 4.67

Thank you very much

Primary Energy or Heating Demand?

Heating demand 48.49 kWh/m² per year
Primary energy demand 41.1 kWh/m² per year

I overlooked something:
Annual renewable electricity production I photovoltaic system: 3300 kWh/year

Thought 17 kWh/m²?!
48.49 kWh/m² at 150 m² (1,615 ft²) and an annual performance factor of 3.0 (without knowing the background) would be 2,424 kWh of electricity per year. At 24 cents per kWh without a basic fee, that would be €580 per year – not unreasonable.

Final energy demand 17 kWh/m²a (1.58 kBtu/ft²a)
Heating demand 48.49 kWh/m²a (4.52 kBtu/ft²a)
Annual renewable electricity production I Photovoltaic system: 3300 kWh/a (112,900 kBtu/a)