ᐅ Heat Pump Connected to Household Electricity or Separate Supply? How to Calculate?
Created on: 9 May 2016 22:57
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tabtab
Hello,
I am currently trying to work out whether it is worthwhile to connect the air-to-water heat pump to the main household electricity meter or to save money using the heat pump tariff.
Since both the heating electricity tariff / heat pump tariff have a peak rate (HT) and an off-peak rate (NT), the question is how much consumption I can expect at which times. For example: the off-peak rate starts at 9 p.m. and lasts for up to 8 hours. So, I need a rough estimate of how much electricity the heat pump consumes annually under the off-peak tariff.
How can I find this out? So far, I have assumed a total consumption of 2,500 kWh, with 1,500 kWh on the peak rate and 1,000 kWh on the off-peak rate. This was just a rough guess. I would prefer to have a more accurate estimate.
Do you have any reference points?
I am currently trying to work out whether it is worthwhile to connect the air-to-water heat pump to the main household electricity meter or to save money using the heat pump tariff.
Since both the heating electricity tariff / heat pump tariff have a peak rate (HT) and an off-peak rate (NT), the question is how much consumption I can expect at which times. For example: the off-peak rate starts at 9 p.m. and lasts for up to 8 hours. So, I need a rough estimate of how much electricity the heat pump consumes annually under the off-peak tariff.
How can I find this out? So far, I have assumed a total consumption of 2,500 kWh, with 1,500 kWh on the peak rate and 1,000 kWh on the off-peak rate. This was just a rough guess. I would prefer to have a more accurate estimate.
Do you have any reference points?
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nordanney10 May 2016 10:48Sebastian79 schrieb:
To be fair, you are not allowed to use this electricity for your heat pump – if you do, a separate meter for the heat pump is worthwhile. Otherwise, it’s not... That’s a generalization. We currently have a provider that allows it!
These restrictions date back to the time of storage heaters that consumed a lot of electricity. Unfortunately, they are still found in various contracts today (which honestly doesn’t matter to me). When we cook for five people, the electricity consumption is significantly higher than when the heat pump runs occasionally...
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Sebastian7910 May 2016 10:54That’s a rare exception – the vast majority have it included. And it’s good that you don’t mind (me neither), but it doesn’t help if this means violating the terms and conditions, making any settlement meaningless.
I also know where it originally comes from – but if it’s written there, it’s there...
Especially since changing it every year can be difficult. You’re lucky now; next time, it might be different...
I also know where it originally comes from – but if it’s written there, it’s there...
Especially since changing it every year can be difficult. You’re lucky now; next time, it might be different...
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Caspar202010 May 2016 12:36nordanney schrieb:
(to be honest, I wouldn’t really care either ).For example, from terms and conditions:
The supply to withdrawal points with backup power systems (for instance, when operating combined heat and power units), emergency generators, electric storage heaters, heat pumps, cash and/or chip card meters is excluded.
Why they exclude this doesn’t matter. They are allowed to do so. If you do it anyway, the law will not be on your side.
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nordanney10 May 2016 12:58Caspar2020 schrieb:
Why they exclude that doesn’t matter. They are allowed to. If you do it anyway, the law is not on your side. That is probably correct. However, I also said that "I wouldn’t care." Emphasis on "would," as I currently have a contract where it is allowed!
If I ever have to decide whether to disregard the terms and conditions or not, I will of course have to think carefully...
At midday, electricity in Germany is practically free on the power exchanges—or at least cheaper than usual. Unfortunately, the heat pump often runs at night. Additionally, they likely also pay fees for peak demand (although I'm not sure), and they use about 10 kW (large older heat pumps) anyway.
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