ᐅ Additional meter for heating electricity tariff: yes or no?
Created on: 23 Oct 2023 13:08
D
Dachshund90
Hello everyone,
I would like to hear your opinions on the above-mentioned question, as two electricians have different views.
Conditions:
- Ground source heat pump 8 kW with cooling function for summer
- Photovoltaic system SE+NW 16.38 kWp
- New single-family house with 193 m² (2,076 sq ft) living area
We now want to determine the size of the distribution board. Of course, it is also crucial to know how many meters I will need and how much space should be reserved for them.
One option is to go with 3+1 meters to be ready for everything. However, there is a price difference depending on whether you can leave out two meter slots and have only 1+1 in the panel.
Additional costs come from meter rental fees and usually the higher basic charges, which reduce the savings from the cheaper heating electricity tariff. If I roughly calculate this, you would need to consume quite a lot of electricity (single-family house > 6000 kWh) to benefit significantly from the lower tariff. Does anyone have a clear example calculation?
The questions are:
1. Is the heating electricity tariff generally worthwhile, and from what consumption level? If it’s currently not worth it, should space still be reserved? Who knows how the difference between tariffs will develop.
2. Can the electricity generated by the photovoltaic system be used both for self-consumption within the house (household appliances, etc.) and for the heat pump?
Thank you for your assessments. I am happy to answer any questions.
Good luck
I would like to hear your opinions on the above-mentioned question, as two electricians have different views.
Conditions:
- Ground source heat pump 8 kW with cooling function for summer
- Photovoltaic system SE+NW 16.38 kWp
- New single-family house with 193 m² (2,076 sq ft) living area
We now want to determine the size of the distribution board. Of course, it is also crucial to know how many meters I will need and how much space should be reserved for them.
One option is to go with 3+1 meters to be ready for everything. However, there is a price difference depending on whether you can leave out two meter slots and have only 1+1 in the panel.
Additional costs come from meter rental fees and usually the higher basic charges, which reduce the savings from the cheaper heating electricity tariff. If I roughly calculate this, you would need to consume quite a lot of electricity (single-family house > 6000 kWh) to benefit significantly from the lower tariff. Does anyone have a clear example calculation?
The questions are:
1. Is the heating electricity tariff generally worthwhile, and from what consumption level? If it’s currently not worth it, should space still be reserved? Who knows how the difference between tariffs will develop.
2. Can the electricity generated by the photovoltaic system be used both for self-consumption within the house (household appliances, etc.) and for the heat pump?
Thank you for your assessments. I am happy to answer any questions.
Good luck
R
RotorMotor31 Oct 2023 08:14Too bad, my post from yesterday was deleted without any notification.
That’s not a 7-cent difference. 😉
Not even 5.
Half of that comes from photovoltaics. So we only buy 1000 kWh more for heating.
Why do you assume your ground-to-water heat pump uses twice as much?
Basically, after all these discussions, you can see that the values are all quite close and could still change.
Anyway, it’s something not worth thinking about for days.
There are more important questions. Like, why do you want to install an 8 kW heat pump in a new building? 😉
Dachshund90 schrieb:What’s interesting is that they offer electricity themselves for 34.99 and for the heat pump 30.48.
E-Werk Mittelbaden ... difference of 7 cents
That’s not a 7-cent difference. 😉
Not even 5.
Dachshund90 schrieb:We use 2000 kWh with our air-to-water heat pump.
I would roughly say they use about 3200 kWh without photovoltaics and about 2300-2500 kWh with the photovoltaic system, which would be more than the 2000 kWh mentioned in the article.
Half of that comes from photovoltaics. So we only buy 1000 kWh more for heating.
Why do you assume your ground-to-water heat pump uses twice as much?
Basically, after all these discussions, you can see that the values are all quite close and could still change.
Anyway, it’s something not worth thinking about for days.
There are more important questions. Like, why do you want to install an 8 kW heat pump in a new building? 😉
K
KarstenausNRW31 Oct 2023 08:19RotorMotor schrieb:
It is interesting that they offer electricity themselves for 34.99 and for the heat pump 30.48. But I wonder why anyone should even sign up with E-Werk Mittelbaden when other providers already sell regular electricity for around 30 cents... (quite expensive in that region, by the way!)
R
RotorMotor31 Oct 2023 08:27KarstenausNRW schrieb:
I do wonder, though, why anyone would sign up with E-Werk Mittelbaden at all when other providers already sell regular electricity for 30 cents... (quite expensive in that region, by the way!)I understand, it was just about them writing an article on a 7-cent difference and then not delivering on it. 😉D
Dachshund9031 Oct 2023 09:07Thank you for your answers.
May I ask how many heated square meters and how large is the photovoltaic system? With storage?
In the end, I don't know, and I found on the datasheet that the selected heat pump for colder regions (over 500 m (1640 ft) above sea level) consumes 2600-3200 kWh per year. So I might be overestimating with my assumptions.
Well, that’s what the heating installer calculated. We have 195 m² (2100 sq ft) of heated space and are building “only” to meet legal requirements, no KFW or similar standard, and we are not located in the warmest part of Germany, as mentioned.
Basically, everyone is right. I will buy a larger meter cabinet so I can respond in the future if the difference between tariffs becomes significant, but I will not install a second meter.
RotorMotor schrieb:
We use 2000 kWh with our air-to-water heat pump.
Half of that comes from the photovoltaic system. So we only buy 1000 kWh extra for heating.
Why do you expect your ground-to-water heat pump to use twice as much?
May I ask how many heated square meters and how large is the photovoltaic system? With storage?
In the end, I don't know, and I found on the datasheet that the selected heat pump for colder regions (over 500 m (1640 ft) above sea level) consumes 2600-3200 kWh per year. So I might be overestimating with my assumptions.
RotorMotor schrieb:
For example, why do you want to install an 8 kW heat pump in a newly built home? 😉
Well, that’s what the heating installer calculated. We have 195 m² (2100 sq ft) of heated space and are building “only” to meet legal requirements, no KFW or similar standard, and we are not located in the warmest part of Germany, as mentioned.
Basically, everyone is right. I will buy a larger meter cabinet so I can respond in the future if the difference between tariffs becomes significant, but I will not install a second meter.
R
RotorMotor31 Oct 2023 09:20Dachshund90 schrieb:
May I ask how many heated square meters?A good 190m² (2045 sq ft) heated.Dachshund90 schrieb:
And how large is the photovoltaic system?12 kWp.Dachshund90 schrieb:
With storage?5 kWh.D
Dachshund9031 Oct 2023 09:43RotorMotor schrieb:
Also a good 190m² (2045 sq ft) heated.
12kWp
5kWhOh okay, then I probably won’t need to purchase an additional 2000 kWh.Similar topics