Good morning everyone,
I wanted to ask what your house’s electricity consumption is at night when everything is quiet and sleeping, so what is running continuously?
We have a newly built house, moved in summer 2019. Our building services include underfloor heating (air-to-water heat pump), controlled mechanical ventilation (runs at full power 3 times a day for 2 hours each, then reduced), a photovoltaic system, and otherwise the usual nighttime appliances (phone charger plugged into USB outlet, e-bikes charging occasionally, 2 TVs on standby, Alexas on standby, etc.).
At night, we have a continuous consumption of about 232W (with ventilation running at reduced power and when the heat pump is not producing). I can see this in the app for the photovoltaic system. From 0:00 to 6:30 a.m. we consume about 2.8 kWh.
How about you?
Best regards
I wanted to ask what your house’s electricity consumption is at night when everything is quiet and sleeping, so what is running continuously?
We have a newly built house, moved in summer 2019. Our building services include underfloor heating (air-to-water heat pump), controlled mechanical ventilation (runs at full power 3 times a day for 2 hours each, then reduced), a photovoltaic system, and otherwise the usual nighttime appliances (phone charger plugged into USB outlet, e-bikes charging occasionally, 2 TVs on standby, Alexas on standby, etc.).
At night, we have a continuous consumption of about 232W (with ventilation running at reduced power and when the heat pump is not producing). I can see this in the app for the photovoltaic system. From 0:00 to 6:30 a.m. we consume about 2.8 kWh.
How about you?
Best regards
It definitely pays off, especially when the heat pump breaks down and needs to be replaced. With a ground source heat pump, you only have to pay for a new source (outdoor unit), while the borehole remains intact and does not require a new investment.
As has been discussed many times, it depends on the specific cost of the borehole compared to any subsidies you wouldn’t receive with an air-to-water heat pump. For us, the additional cost was very manageable, and there is no outdoor unit attached to the building.
The year has ended, and I just read the meter readings.
The heat pump consumed about 2400 kWh in 2020. The house is 200 m² (2150 sq ft) with four occupants.
The annual performance factor is 4.29 – there’s room for improvement.
Household electricity usage was 3700 kWh.
30% of that was covered by self-consumption from the photovoltaic system.
As has been discussed many times, it depends on the specific cost of the borehole compared to any subsidies you wouldn’t receive with an air-to-water heat pump. For us, the additional cost was very manageable, and there is no outdoor unit attached to the building.
The year has ended, and I just read the meter readings.
The heat pump consumed about 2400 kWh in 2020. The house is 200 m² (2150 sq ft) with four occupants.
The annual performance factor is 4.29 – there’s room for improvement.
Household electricity usage was 3700 kWh.
30% of that was covered by self-consumption from the photovoltaic system.
tomtom79 schrieb:
Please do not confuse trench collectors with geothermal energy systems. I didn’t mention trench collectors – but hey... those can even be done for under the 2000 € you mentioned.
Bookstar schrieb:
To me, geothermal energy always implies deep drilling, which typically lasts at least 50 years, often much longer. Trench collectors and similar setups with DIY work naturally look better financially. But they are still completely unprofitable. “But still completely unprofitable.”
Such a blanket statement is simply wrong.
I already showed you the calculation above.
Because even deep collectors or system collectors (vertical slinky coils or angled trenches) can be obtained WITHOUT DIY work at the approximate prices I mentioned earlier of around 4000 € (about 4400 USD / 3500 GBP).
Of course, NOT from heating contractors who only install and sell air-source heat pump solutions.
Ultimately, anyone can calculate for themselves what is more economical in the long term, including subsidies, etc. (also considering environmental impact and noise).
“Completely unprofitable” – as you claimed – is nonsense!
See also here:
guckuck2 schrieb:
It becomes worthwhile at the latest when the heat pump needs to be replaced.
With an air-to-water heat pump, you pay for a new outdoor unit each time, while the borehole remains and requires no additional investment.
And, as has been discussed often enough, it depends on the exact cost of the drilling compared to subsidies you wouldn’t get with an air-to-water heat pump.
For us, the extra costs were very manageable, and there is no outdoor unit on the building. Ötzi Ötztaler1 Jan 2021 21:02
guckuck2 schrieb:
The annual performance factor is 4.29 – there is still room for improvement.Yes, there is potential for increase. A well-adjusted modulating air source heat pump can definitely compete with that. Try experimenting a bit with the parameters to optimize your system...
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