ᐅ Electricity Consumption of Your Heat Pumps – Comparative Figures?
Created on: 5 Jan 2018 00:33
K
KrustyDerClown
Hello everyone,
When searching for reference values for my heat pump, I couldn’t really find much. That’s why I thought of starting this thread, so anyone interested can share their data. I consider the following parameters relevant for comparing values:
Type of heat pump (including exact model, if possible)
House size (sqm)
Electricity consumption
Hot water production via heat pump? Yes/No
Energy efficiency standard of the house (e.g., KFW55, KFW70, etc.)
If there are other values I haven’t considered yet, please feel free to add them.
I hope that by comparing these values, we can get a rough idea whether a heat pump is working well or consuming too much electricity. I understand these can only be approximate figures – it also depends on how the heating is used and how much hot water is consumed.
My values are as follows:
Type of heat pump (including exact model, if possible): Air-to-water heat pump WWP L15 ARS
House size (sqm): 190
Electricity consumption: December 2017 – 745 kWh
Hot water production via heat pump? Yes
Energy efficiency standard of the house (e.g., KFW55, KFW70, etc.): KFW55
Best regards,
Oliver
When searching for reference values for my heat pump, I couldn’t really find much. That’s why I thought of starting this thread, so anyone interested can share their data. I consider the following parameters relevant for comparing values:
Type of heat pump (including exact model, if possible)
House size (sqm)
Electricity consumption
Hot water production via heat pump? Yes/No
Energy efficiency standard of the house (e.g., KFW55, KFW70, etc.)
If there are other values I haven’t considered yet, please feel free to add them.
I hope that by comparing these values, we can get a rough idea whether a heat pump is working well or consuming too much electricity. I understand these can only be approximate figures – it also depends on how the heating is used and how much hot water is consumed.
My values are as follows:
Type of heat pump (including exact model, if possible): Air-to-water heat pump WWP L15 ARS
House size (sqm): 190
Electricity consumption: December 2017 – 745 kWh
Hot water production via heat pump? Yes
Energy efficiency standard of the house (e.g., KFW55, KFW70, etc.): KFW55
Best regards,
Oliver
ares83 schrieb:
We have a KFW 55 standard with 160 sqm (1722 sq ft) but use an air-to-water heat pump. Even for us, the second meter didn’t pay off; for you, with likely even lower consumption, it probably won’t be worthwhile either. Just calculate it yourself using your local figures and don’t forget the extra monthly basic fee. Even if you plan to install a photovoltaic system later, having two meters usually doesn’t make much sense. Of course, it’s a simple calculation. For us, it was worth it:
2019 – 2700 kWh on the heat pump tariff = 2700 * 0.18 = 486 + 90 = 576 euros
Without the heat pump tariff = 2700 * 0.28 = 756 euros
And naturally, the second meter can also make sense when using a photovoltaic system. We have had one on our roof since August and kept the meter. In this case, a complex metering setup must be implemented, which not every grid operator agrees to.
Best regards
Snowside schrieb:
Of course, it’s a straightforward calculation. For us, it was worthwhile:
2019 – 2700 kWh using heat pump tariff = 2700 * 0.18 = 486 + 90 = 576 euros
Without heat pump tariff = 2700 * 0.28 = 756 euros You’re forgetting that this thread is already 2 years old. Currently, the price difference between heat pump electricity and household electricity is relatively large. However, this fluctuates. A few years ago, in my region it was sometimes only 2 cents.
Snowside schrieb:
And of course, the second meter can also be worthwhile with a photovoltaic system. We have had one on the roof since August and kept the meter. Here, a complex metering concept needs to be implemented, which is not wanted by every grid operator.
Regards Does this automatically tie both meters to the same electricity provider?
Musketier schrieb:
You forget that the thread is already 2 years old. At the moment, the price difference between heat pump electricity and household electricity is quite large. But that fluctuates. A few years ago, it was sometimes only 2 cents in my region. Oops, I didn’t pay attention to the date, sorry. Admittedly, the difference here is quite significant. Even the heating engineer was surprised by it.
Musketier schrieb:
Do you have to connect both meters to the same electricity provider by default? That’s a good question I still need to look into, especially now that the photovoltaic system is operational. Currently, it’s the same provider, but also the cheapest one available in our area.
195 sqm (2,072 sq ft), KfW 55, mechanical ventilation with heat recovery, brine-water heat pump 6.1 kW non-modulating with one 120 m (394 ft) borehole, 4 people with relatively high hot water demand, electric backup heater with 0 hours runtime, resulted in 2,500 kWh electricity consumption in 2019, equivalent to approximately €54 per month. Household electricity only, no heat pump tariff. Actual energy costs are lower due to photovoltaic system.
I am satisfied.
The annual performance factor (COP) is just under 4. This is due to the high hot water demand. In summer the COP was only 2.4, while during the heating period it was 5.
There is still room for improvement.
I am satisfied.
The annual performance factor (COP) is just under 4. This is due to the high hot water demand. In summer the COP was only 2.4, while during the heating period it was 5.
There is still room for improvement.
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