ᐅ Determine the electricity consumption of the air-to-water heat pump as a proportion of the total power consumption.

Hello, in 2020, we consumed about 6,800 kWh of electricity. Of this, 1,750 kWh was self-consumption from our photovoltaic system. This means our electricity purchase from the grid was 4,062 kWh. Since we have an air-to-water heat pump, the heating also runs on electricity.

How can I now separate the electricity consumption of the air-to-water heat pump from the overall costs?

We have a meter on the electrical distribution board showing 1,294.59 kWh. Additionally, there are two heat meters installed (12,082 and 2,477 MWh).

Tx-25 schrieb:

How can I calculate the electricity consumption of the air-to-water heat pump from the costs?

We have a meter on the power rail showing 1,294.59 kWh.

Then you already have the electricity consumption of the air-to-water heat pump, right? Or what do you mean / what does the meter show?

kati1337 schrieb:

So you have the electricity consumption of the air-to-water heat pump? Or what do you mean by that / what does the meter show?

Yes, I suspected that already but wasn’t completely sure. The meter is installed inside the cabinet. However, I didn’t know what exactly it measures.
The consumption would then be for 1.5 years. That seems a bit low to me?

I was under the impression that heat meters had to be installed to determine the consumption? Or what else would they be for?

Tx-25 schrieb:

Yes, I suspected that but wasn’t completely sure. The meter is installed inside the cabinet. However, I didn’t know what it is measuring.
The consumption would then be for 1.5 years. That seems a bit low to me?

I thought the heat meters had to be installed to determine the consumption? Or what else are they for?

Oh, of course, I can’t know that from a distance either. Could you ask the company that did the installation?
Is that only for heating electricity or also for ventilation? It seems low to me as well, but not impossible.

It’s hard to guess what the second electric meter is for. It’s almost certainly not for the heat pump, since too much heat was produced for that to be the case.

Where are the heat energy meters installed? One on the heating system and one on the domestic hot water?
Is there a separate apartment?

Overall, the consumption seems quite high. What kind of house and heat pump do you have?
Often, you can also check the consumption directly on the heat pump.

RotorMotor schrieb:

Often, you can also check the consumption on the heat pump.

You can on ours, but the technician from SE once said that the values are only "assumed" and not really meaningful. (?)