ᐅ Heat pump and household electricity combined on a single meter

Hello,
I am having a heat pump with a capacity of 5.46 kWh installed soon and have some questions regarding the electrical installation. Yesterday, the electrician who works with the builder was on site. According to the electrician, Netze-bw applies lockout periods, even though I have only one meter for the heat pump, the photovoltaic system, and household electricity. A new meter was installed on 04.05.23 by Netze-bw due to the new photovoltaic system. Using a separate meter for the heat pump electricity is not an option. Does anyone have experience with Netze-bw and the required meter installation for heat pumps and photovoltaic systems? I want to run everything through a single meter. Do I need to register the heat pump with Netze-bw?
Regards

The heat pump should have been registered with Netze BW at the same time as applying for the electrical connection. However, it can also be done afterward. You can find the form on the Netze BW website.

Experience with heat pumps / household electricity / photovoltaic systems: I have been using a two-way meter in my second house (here, electricity for the heat pump costs the same as household electricity, so I would incur extra fees for a separate basic charge or meter rental). Only a two-way meter is mandatory. You are not required to install a second meter specifically for the heat pump.

My advice: If your main electrical connection is suitable, then don’t do anything. Your heat pump has a capacity of 5.46 kW – is that thermal output or power input? The power input is significantly lower (by a factor of 2 to 4.5).

The removal of the second meter is still pending for me (not that I ever wanted it, but no one listens anyway, and asking is pointless...), but as a rule, even with NetzeBW, the heat pump will no longer have blackout periods. The electrician can then remove the blackout switch.

KarstenausNRW schrieb:

The heat pump should have been registered with Netze-BW already when applying for the electrical connection. However, it can also be done afterwards. You can find the form on the Netze BW website.

Experience with heat pump / household electricity / photovoltaic: In my second house, everything runs through a two-way meter (here, electricity for the heat pump costs the same as household electricity, so I would be paying extra for an additional basic fee / meter rental). The only requirement is a two-way meter. You are not obliged to install a second meter specifically for the heat pump.

My advice: If the main electrical connection is sufficient, then don’t do anything. Your heat pump has a capacity of 5.46 kW (kilowatt) – is that thermal output or electrical consumption? The electrical consumption is significantly lower (by a factor of 2 to 4.5).

Existing building

n_A7/W35

7.9 kW

A7 / W35 electrical power input

1.7 kW

COP A7/W35

4.7

A2 / W35 heating capacity

5.5 kW

A2 / W35 electrical power input

1.5 kW

A2 / W35 COP

3.7

A-7 / W35 heating capacity

6.6 kW

A-7 / W35 electrical power input

2.3 kW

A-7 / W35 COP

2.9

A7 / W55 heating capacity

7.9 kW

A7 / W55 electrical power input

1.7 kW

COP A7/W55

4.7

A-7 / W55 heating capacity

5.6 kW

A-7 / W55 electrical power input

2.6 kW

A-7 / W55 COP

2.1

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EHPA quality seal (Austria)

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08/06/2023

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Hello, electricity for heat pumps is always cheaper, so it is generally recommended to have two meters. I assume that electricity for heat pumps will be discounted even more in the future.

HilfeHilfe schrieb:

Hello, heat pump electricity is always cheaper, so it is always recommended to have two meters. I assume that heat pump electricity will be discounted even more in the future.

Nonsense. Although, I just checked. I don’t live in a rural area but on the border of two metropolitan regions (Düsseldorf/Ruhr area). There are countless electricity providers here. I picked out the best ones.

Heat pump electricity:

Household electricity:

With 3,000 kWh (3,000 kWh) of heat pump electricity, you save €15.20 per year – but when you include the basic charge, you actually end up paying more overall.

So: it’s fake news that heat pump electricity is always cheaper in the end.

P.S. I have been heating with a heat pump for almost 10 years. In all that time, having a separate meter for heat pump electricity has never been worthwhile.