ᐅ Photovoltaics and Heat Pumps – Meter Confusion and Cost Issues
Created on: 17 Jul 2020 20:29
K
kati1337
Hello everyone,
does anyone here use an air-to-water heat pump combined with a photovoltaic system?
I’m currently unsure whether we will get a dual-tariff meter / two-rate meter, or just two separate regular meters (one for household electricity, one for the heat pump electricity).
We have an all-in-one unit with controlled living space ventilation plus air-to-water heat pump integrated.
Now I saw the heat pump tariff from EWE, which states “18 hours of operating time per day,” something about a 6-hour interruption and a buffer. This probably isn’t compatible with us, as I have never heard that our device should have no power for 6 hours during the day.
Does that mean I generally cannot use the heat pump electricity tariff? Or do I just have to choose a different provider?
On Check24, I find several heat pump tariffs. Many of them show the same cent price for peak and off-peak times. Does that mean I can use these tariffs even if I only have a “regular” separate meter for my heat pump (not a dual-tariff meter)?
And can someone tell me how much an additional meter for the heat pump costs? I keep reading that heat pump tariffs are not always worthwhile because the extra meter costs more. Does this only apply to the dual-tariff meter, or does a regular second meter also incur an additional monthly fee?
Last but not least – how does it work if you have a photovoltaic system but also two meters? We definitely want to use the photovoltaic electricity for both – the air-to-water heat pump AND the household electricity – to maximize our own consumption of the PV electricity. Is this easily possible with two meters? How is that typically set up?
Sorry for the many basic questions. I’m trying to get a better understanding of this topic and our electrical contractor is not our favorite trade – some might remember the previous troubles. That’s why I want to keep an eye on it and understand exactly what they are installing.
does anyone here use an air-to-water heat pump combined with a photovoltaic system?
I’m currently unsure whether we will get a dual-tariff meter / two-rate meter, or just two separate regular meters (one for household electricity, one for the heat pump electricity).
We have an all-in-one unit with controlled living space ventilation plus air-to-water heat pump integrated.
Now I saw the heat pump tariff from EWE, which states “18 hours of operating time per day,” something about a 6-hour interruption and a buffer. This probably isn’t compatible with us, as I have never heard that our device should have no power for 6 hours during the day.
Does that mean I generally cannot use the heat pump electricity tariff? Or do I just have to choose a different provider?
On Check24, I find several heat pump tariffs. Many of them show the same cent price for peak and off-peak times. Does that mean I can use these tariffs even if I only have a “regular” separate meter for my heat pump (not a dual-tariff meter)?
And can someone tell me how much an additional meter for the heat pump costs? I keep reading that heat pump tariffs are not always worthwhile because the extra meter costs more. Does this only apply to the dual-tariff meter, or does a regular second meter also incur an additional monthly fee?
Last but not least – how does it work if you have a photovoltaic system but also two meters? We definitely want to use the photovoltaic electricity for both – the air-to-water heat pump AND the household electricity – to maximize our own consumption of the PV electricity. Is this easily possible with two meters? How is that typically set up?
Sorry for the many basic questions. I’m trying to get a better understanding of this topic and our electrical contractor is not our favorite trade – some might remember the previous troubles. That’s why I want to keep an eye on it and understand exactly what they are installing.
K
knalltüte17 Jul 2020 20:48There is a dedicated forum specifically for photovoltaics, e-mobility, and related topics. Detailed references to that forum are unfortunately not welcome here. However, there are real experts there who can explain everything to you precisely.
superzapp schrieb:
There is a dedicated forum specifically for photovoltaics, e-mobility, and similar topics.
Detailed references to that forum are unfortunately not appreciated here.
There you will find real experts who can explain everything to you precisely. Thank you. Then I am definitely in the right place here.
S
Stefan89017 Jul 2020 21:47If you can estimate your consumption, you can calculate whether two tariffs are worthwhile or not. Usually, a large part of the savings from the heat pump tariff is offset by the additional basic fee for the meter.
As far as I know, it is possible, but the wiring is significantly more complex. You should discuss this with your electrician.
kati1337 schrieb:
Last but not least – how does it work when you have a photovoltaic system but also 2 meters? We definitely want to use the photovoltaic power for both the air-to-water heat pump AND the household electricity to maximize self-consumption of the photovoltaic power. Is that also easily possible with 2 meters?
As far as I know, it is possible, but the wiring is significantly more complex. You should discuss this with your electrician.
Stefan890 schrieb:
If you can estimate your consumption, you can calculate whether two tariffs are worthwhile or not. Usually, a large part of the savings from the heat pump tariff is offset by the additional fixed meter fee.
As far as I know, it is possible, but the wiring is significantly more complicated. You should discuss this with your electrician. Do you know how much the additional fixed meter fee costs? I could not find any information about it on the EWE / EWE Netz websites.
We know our current consumption quite well, and the heat pump’s usage is, of course, only an estimate.
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