ᐅ Determine the electricity consumption of the air-to-water heat pump as a proportion of the total power consumption.
Created on: 2 Jan 2022 13:38
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Tx-25
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).
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).
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Badener19708 Jan 2022 18:05User0815 schrieb:
Those are consumption readings, not feed-in values, right?Actually, see the picture... the display keeps switching back and forth..
KingJulien9 Jan 2022 11:35The power feed cannot be correct, obviously. Why is there such a high reading on the meter?
The difference would result in a realistic value.
What does the information E21 on the meter mean?
The difference would result in a realistic value.
What does the information E21 on the meter mean?
Badener1970 schrieb:
I have a question on this topic, independent of the original post. We have been living in our new KFW55 house with 9.9 kWp photovoltaic system since the end of October. We have two meters as shown in the picture: the left one currently shows 1324/4691 kW, the right one 442/4912 kW. How should this be interpreted? The SMA Homemanager was installed at the end of December, but with it I can only read the photovoltaic output and the consumption without the heat pump. 1. The meter shows kWh (kilowatt-hours).
2. Why wasn’t the electrician asked during handover?
3. There seems to be an obvious wiring problem if the heat pump meter is also recording feed-in below 280 (kWh).
=> This should be reported to the general contractor and documentation or correction requested.
The forum, like you, can only speculate.
OWLer schrieb:
3. It seems that something obviously went wrong with the wiring if the heat pump meter is registering feed-in below 280No, everything is correct; this is called meter cascade, also known as measurement concept 8.
The reading from October 21 does not indicate when the photovoltaic system and the meters were activated... given the high values, it is assumed that this happened already during the summer.
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