ᐅ Photovoltaic system / heat pump – do you have two meters?
Created on: 2 Jan 2021 07:15
C
chewbacca123
Hello and Happy New Year!
I have a question – since last October, we have had a photovoltaic system on the roof, including a battery storage.
Previously, we had two electricity meters: one for general electricity and one for the heat pump because of the reduced electricity rate.
Our electrician connected the heat pump’s electricity to the general meter due to the photovoltaic system, so we could see how this setup works and whether the heat pump benefits from the solar generation.
In December, we had a consumption of 700 kWh, which is quite high! Our general electricity use is usually around 250 to 300 kWh per month.
I understand that these are the darker months and it should improve from March, with likely much lower electricity consumption as the photovoltaic system generates more and the heat pump uses less.
How do you handle this – do you only have one meter now? Or do you keep the heat pump on a separate meter?
Thanks and best regards
I have a question – since last October, we have had a photovoltaic system on the roof, including a battery storage.
Previously, we had two electricity meters: one for general electricity and one for the heat pump because of the reduced electricity rate.
Our electrician connected the heat pump’s electricity to the general meter due to the photovoltaic system, so we could see how this setup works and whether the heat pump benefits from the solar generation.
In December, we had a consumption of 700 kWh, which is quite high! Our general electricity use is usually around 250 to 300 kWh per month.
I understand that these are the darker months and it should improve from March, with likely much lower electricity consumption as the photovoltaic system generates more and the heat pump uses less.
How do you handle this – do you only have one meter now? Or do you keep the heat pump on a separate meter?
Thanks and best regards
T
Tobias7899 Aug 2021 08:41Hello everyone,
to avoid starting a new thread, I’m posting my question here.
We are building with Schwörerhaus. The construction appointment is planned for November/December. I currently have an offer for a photovoltaic system with a battery storage for the pitched roof.
I work for a local energy supplier. The annual basic fee for the electricity meters is waived for me, so I only have to pay the actual electricity costs.
In this case, would you recommend having two electricity meters – one for the heat pump and one for the household electricity?
Would the photovoltaic system and the battery be connected to both meters, or do you have to decide to which meter the photovoltaic system supplies electricity?
to avoid starting a new thread, I’m posting my question here.
We are building with Schwörerhaus. The construction appointment is planned for November/December. I currently have an offer for a photovoltaic system with a battery storage for the pitched roof.
I work for a local energy supplier. The annual basic fee for the electricity meters is waived for me, so I only have to pay the actual electricity costs.
In this case, would you recommend having two electricity meters – one for the heat pump and one for the household electricity?
Would the photovoltaic system and the battery be connected to both meters, or do you have to decide to which meter the photovoltaic system supplies electricity?
Tobias789 schrieb:
Would you use two electricity meters in this case—one for the heat pump and one for the household electricity?You’ll need to compare tariffs or check with your utility company how much the cost advantage for heat pump electricity would be in your situation.
Tobias789 schrieb:
Would the photovoltaic system or the battery be connected to both meters, or do you have to decide which meter the photovoltaic system feeds electricity into?You have to choose, unless your grid operator or metering point operator offers cascade metering (metering concept 8).
T
Tobias7899 Aug 2021 09:44guckuck2 schrieb:
You will need to do a tariff comparison or check with your employer to see the cost advantage for heat pump electricity in your case.
You have to decide unless your grid operator/meter operator offers cascade metering (metering concept 8).I would purchase household electricity at 29.xx cents per kWh and heat pump electricity at 23.xx cents per kWh.
As far as I know, my energy supplier or employer does offer cascade metering. However, the contacts for this will not be available until next week.
I will sign the offer for the photovoltaic system later today.
Our heat pump uses about 2000 kWh per year. 60% of that comes from the photovoltaic system, which means roughly 800 kWh drawn from the grid. With your six cent tariff difference, that amounts to €48 per year. Even if it were twice as much, I would still choose the simplest option (just one meter).
Hangman schrieb:
Our heat pump uses about 2000 kWh per year. 60% comes from the photovoltaic system, which means roughly 800 kWh grid consumption. With your six-cent tariff difference, that’s €48 per year. Even if it were double, I would still choose the simplest option (i.e., a single meter). With the values mentioned, the conclusion is understandable. However, 2000 kWh is relatively low and 60% coverage from photovoltaics is quite high, so the ratios may vary depending on one’s specific situation.
But yes, you won’t save hundreds of euros with this; in our case, it’s just under €100 per year.
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