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
chewbacca1238 Jan 2021 10:48Stefan2.84 schrieb:
Yes, although he already made some "promotion" for each storage unit. He meant that the durability (depending on the number of charge cycles?!) has significantly improved. But I will probably skip it. Actually, it’s a she.
And no, this is not a promotion, but this is how I would do it. If you want storage, now is the time because there are still subsidies available.
S
Stefan2.848 Jan 2021 10:57chewbacca123 schrieb:
So he is actually a she.I meant the gentleman I had for the consultation at the house 🙂 Poor choice of words on my part.
chewbacca1238 Jan 2021 13:01Stefan2.84 schrieb:
I meant the gentleman I had for the consultation at the house 🙂
Poorly phrased on my part.Oh, I see2 meters in cascade, since photovoltaic will probably cover only about 1/4 to 1/3 of the heat pump’s electricity consumption (~3000 kWh average). This is based on an advanced hour-by-hour forecasting tool, not a rough monthly estimate from vendors that do not model the heat pump. A 10 cent difference in the tariff (20 vs. 30 cents/kWh) results in an annual saving of 200–225 euros. The meter fee, by comparison, is 60 euros per year. A neighbor with an identical house setup and heat pump is trying a combined meter with cloud-based management. This will provide an interesting near-direct comparison (south-facing wall vs. east/west system, different sizing, different battery).
halmi schrieb:
If the difference is that large, a cascade setup can make sense. For us, it's only 3.9 cents with an additional base fee of €113 (about $120). Is this limitation due to the locally available providers?
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