ᐅ Calculation of Electricity Consumption Based on Heating Demand?

Hi,

maybe someone can help me out here.
If I know the heat demand of my house, how can I estimate the approximate annual electricity consumption from that?

My heat demand is roughly 10 kW (including hot water). What other values do I need to calculate the electricity usage? I plan to generate the heat with a monovalent air-to-water heat pump.

I keep coming across full load hours (usually given as a standard 2,000 hours) and the annual performance factor (seasonal coefficient of performance) of a heat pump. Is that all I need?

10 kW * 2,000 h (hours) = 20,000 kWh (heat energy).
20,000 kWh / 2.8 (annual performance factor) = 7,143 kWh of electricity used. Is that correct? I know a detailed calculation is much more complex (transmission losses, etc.). A rough estimation would be enough, but I think I might be missing something and also find the 2,000 full load hours too approximate.

Looking forward to your feedback.

The heating load for a modern house is typically around 5 kW, the heating hours are about 1800, and the annual performance factor (COP) of a heat pump is usually between 4 and 5.
So, 5 * 1800 / 4.5 = 2000 kWh
* 25 cents/kWh = 500 € heating costs

Thank you in advance.
Okay, but the calculation was otherwise correct. Are the 1800 fixed? Do they not vary depending on location or altitude, or can this approximation be used for all of Germany?

Of course, this is quite general since it depends on many factors, but as a rough estimate, it's fairly accurate.

However, the assumed annual performance factor seems quite high for real-world operation. I would expect it to be closer to 3 to 3.5.

So, if a new building is planned to have an air-to-water heat pump and it does not achieve an annual performance factor of 4, it means either the device is poor quality, the settings are incorrect, or the entire system was planned wrongly.
4 is realistic.