Hello,
I know there are many factors affecting electricity consumption, so it might be a bit of guesswork. Still, I want to give it a try.
We have a ground-source heat pump (deep drilling). We heat about 170 sqm (1,830 sq ft) with it and don’t have large electricity consumers like an aquarium, etc. Our house meets the KFW 55 standard.
Currently, we use roughly 30 kWh per day on average for everything (heating and regular electricity). We rarely have temperatures below freezing at night. When I calculate the consumption over 30 days, it comes to about €250 per month in winter. Of course, consumption is naturally lower in summer.
Does anyone have comparable numbers? We just moved in in October, and I’m wondering if the heating system is working properly (efficiently) and if the output from the ground loop is as expected.
Looking forward to your feedback.
Greetings from Lake Constance,
mading
I know there are many factors affecting electricity consumption, so it might be a bit of guesswork. Still, I want to give it a try.
We have a ground-source heat pump (deep drilling). We heat about 170 sqm (1,830 sq ft) with it and don’t have large electricity consumers like an aquarium, etc. Our house meets the KFW 55 standard.
Currently, we use roughly 30 kWh per day on average for everything (heating and regular electricity). We rarely have temperatures below freezing at night. When I calculate the consumption over 30 days, it comes to about €250 per month in winter. Of course, consumption is naturally lower in summer.
Does anyone have comparable numbers? We just moved in in October, and I’m wondering if the heating system is working properly (efficiently) and if the output from the ground loop is as expected.
Looking forward to your feedback.
Greetings from Lake Constance,
mading
@basti: Yes, that's correct, only household electricity, excluding heating. (We also have a gas heating system).
2000 kWh of household electricity per year? Impressive! We never managed to stay that low before, even without children, when living in a rental apartment. Our consumption was around 2500 kWh per year.
And the fifth... wow! Do you have photovoltaic panels with self-consumption?
2000 kWh of household electricity per year? Impressive! We never managed to stay that low before, even without children, when living in a rental apartment. Our consumption was around 2500 kWh per year.
And the fifth... wow! Do you have photovoltaic panels with self-consumption?
We used to have a consumption of 1800 kWh for three people in our rental apartment. We switched all the lamps to LED, stopped using a desktop PC (only a laptop), and turned off the entire TV system with a remote-controlled power outlet when not in use. This way, it works—at least in a rental apartment.
bernie schrieb:
@bastiDo you have a photovoltaic system with self-consumption?No, we decided against it because, in my opinion, it would never have been financially worthwhile.
Basti2709 schrieb:
No, we decided against that because, in my opinion, it would never have been cost-effective. Interesting, for us it pays off because we buy electricity at 25¢ and sell it at 12.6¢. Is your photovoltaic system significantly older, do you get more per kWh?
Here are my figures from 2017:
180 sqm (1,938 sq ft) living space, 85 sqm (915 sq ft) basement, 60 sqm (646 sq ft) garage.
KfW 70 building from 2013.
Controlled residential ventilation: 577 kWh
Ground source heat exchanger for the controlled ventilation: 229 kWh
Heat pump: 3,938 kWh
Household electricity: 4,395 kWh (I have a lot of home technology running constantly—NAS, router, several access points and cameras, DECT repeater, KNX bus, iPad visualization, etc., it all adds up)
Total consumption: 9,139 kWh, of which 1,915 kWh are covered by our photovoltaic system—that’s about 21%. If my wife didn’t always run the washing machine and dryer only at night, it would probably be even more.
I think the photovoltaic system definitely pays off. The 1,915 kWh save me nearly €480 per year, plus €620 in feed-in tariffs for the surplus. That makes about €1,100 per year. The system with 5.9 kWp cost €6,600.
180 sqm (1,938 sq ft) living space, 85 sqm (915 sq ft) basement, 60 sqm (646 sq ft) garage.
KfW 70 building from 2013.
Controlled residential ventilation: 577 kWh
Ground source heat exchanger for the controlled ventilation: 229 kWh
Heat pump: 3,938 kWh
Household electricity: 4,395 kWh (I have a lot of home technology running constantly—NAS, router, several access points and cameras, DECT repeater, KNX bus, iPad visualization, etc., it all adds up)
Total consumption: 9,139 kWh, of which 1,915 kWh are covered by our photovoltaic system—that’s about 21%. If my wife didn’t always run the washing machine and dryer only at night, it would probably be even more.
I think the photovoltaic system definitely pays off. The 1,915 kWh save me nearly €480 per year, plus €620 in feed-in tariffs for the surplus. That makes about €1,100 per year. The system with 5.9 kWp cost €6,600.
mading schrieb:
@Nordmann
Thanks. I will check. The heat pump (it's a Vitocal 309g) should also have consumption information.I have a Vitocal 333 running.
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