Heat pump on home electricity or separate? How to calculate?

Hello,

I am currently trying to create a calculation to see if it is worthwhile to connect the air-to-water heat pump to the household electricity meter or to save money with the heat pump tariff.

Since there is a peak tariff (HT) and an off-peak tariff (NT) for the heating electricity tariff / heat pump tariff, the question now is when I can expect which consumption. For example: the off-peak tariff applies from 9 p.m. for a maximum of 8 hours. That means I would need to know roughly how much electricity the heat pump consumes annually in the so-called off-peak tariff.

How do I find that out? I have always assumed a flat rate of 2500 kWh, of which 1500 fall under the peak tariff and 1000 under the off-peak tariff. That was merely a guess. But I would like to have it somewhat more accurate.

Do you have any reference points?

2500 kWh... power per hour doesn't make much sense. There are surely many threads about this in the pink forum... someone writes about a distribution of 55% off-peak and 45% peak. You can certainly help with regulation.. hot water only at night, for example. Heating warmer at night (although you have to check if that's worthwhile)

How much is your saving with, for example, your assumption and how much with that of BeHaElJa? Then you can roughly estimate whether it is worth investigating the topic in detail. In my opinion, it is not worth fiddling with the heating run times forever for a few euros of savings and possibly sacrificing comfort.

I have nearly a 50% to 50% distribution.
My heat pump consumption is about 3000 per year - which corresponds to 1500 in HT and 1500 in NT.
If you now look at E.On, immergrün and others -> they all offer tariffs for heat pumps. For NT / HT meters, the same price is listed. In other words, it doesn't matter at all whether you get an NT / HT meter for the heat pump or not. The heat pump tariff is usually cheaper than household electricity, although electricity prices tend to decrease as the total quantity increases. Therefore, it is simply a calculation problem and whether you want it or not.

What prices do you expect for heat pump electricity or household electricity? Currently, you get electricity for under 18-20 cents (including basic charge), but you have to regularly decide on or switch providers. So for you, a calculation example: two tariffs with two meters or the simple option (which we chose), electricity in the last two years at just under 19 cents each time (basic charge already included).

Currently, you get electricity for under 18-20 cents (including basic fee), but you have to regularly choose or switch providers.

But to be fair, you are not allowed to use this electricity for your heat pump - if you do, the extra meter for the heat pump is already worthwhile. Otherwise not...