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
Schimi17913 Dec 2020 07:20gmt94 schrieb:
... I installed a Shelly3em in the distribution board, ...Yay ... another project 🙂
Schimi1791 schrieb:
I did some more detailed calculations.
Consumption so far: 4239 kWh over 383 days = 11.07 kWh/day
However, from November 15, 2019, to January 25, 2020 (move-in date), only construction power was used, but quite extensively.
Let's see how it looks on January 25, 2021. Probably the average will be a bit higher by then... 🙂 Without a heat pump, so no heating or hot water?
Schimi17913 Dec 2020 08:10This concerns only household electricity because kati1337 wrote in post #226:
That’s why I feel somewhat reassured about electricity consumption.
Currently, we (still) heat with oil (Buderus). Hot water also comes from that. The heating system will eventually be replaced. So far, it’s running without any problems. However, I have already had a gas connection installed since it was free. But from 2021, the CO2 tax applies. Therefore, I am still unsure about the next heating system, possibly pellets(?). “Our” installer mentioned that a new refrigerant for air-to-water heat pumps will soon be available, which would increase efficiency so they wouldn’t have to use additional electric heating even on very cold days. Long cold periods are common in our area. While gardening might already be happening elsewhere, we often still have snow or at least it’s too cold for gardening here. About a year ago, I requested a quote for a ground-source heat pump plus solar panels on the roof. It took some time for the offer to arrive. When I finally got it, I understood why: it was about 50 pages long, and each page averaged around €1,000! Installation work was not included and would have been an additional five-figure amount. I didn’t read it in much detail because €50,000 plus several thousand for heating—even with subsidies—was beyond reasonable for me. And I believe I remember that, contrary to my wishes, only an air-to-water heat pump was included in the offer. I’m also considering just installing a gas heating system first and waiting to see how heating technology develops. Gas boilers don’t last forever either, and according to my energy consultant, I could still “survive” with a gas boiler. I took that as a compliment...
Heating, however, is another project 🙂
kati1337 schrieb:
Well, with the (hopefully) repaired heat pump, we currently use about 25 kWh per day. An estimated 12 kWh of that is household electricity, and the rest (12-13) is the heat pump. We don’t know the exact figures, but in the old house, we used around 12 kWh of electricity per day on average.
That’s why I feel somewhat reassured about electricity consumption.
Currently, we (still) heat with oil (Buderus). Hot water also comes from that. The heating system will eventually be replaced. So far, it’s running without any problems. However, I have already had a gas connection installed since it was free. But from 2021, the CO2 tax applies. Therefore, I am still unsure about the next heating system, possibly pellets(?). “Our” installer mentioned that a new refrigerant for air-to-water heat pumps will soon be available, which would increase efficiency so they wouldn’t have to use additional electric heating even on very cold days. Long cold periods are common in our area. While gardening might already be happening elsewhere, we often still have snow or at least it’s too cold for gardening here. About a year ago, I requested a quote for a ground-source heat pump plus solar panels on the roof. It took some time for the offer to arrive. When I finally got it, I understood why: it was about 50 pages long, and each page averaged around €1,000! Installation work was not included and would have been an additional five-figure amount. I didn’t read it in much detail because €50,000 plus several thousand for heating—even with subsidies—was beyond reasonable for me. And I believe I remember that, contrary to my wishes, only an air-to-water heat pump was included in the offer. I’m also considering just installing a gas heating system first and waiting to see how heating technology develops. Gas boilers don’t last forever either, and according to my energy consultant, I could still “survive” with a gas boiler. I took that as a compliment...
Heating, however, is another project 🙂
Now that outdoor temperatures are in the low single digits, our daily energy consumption is around 30 kWh, including household electricity, with two people working from home — meaning the computer and coffee machine run all day. 😉 Also, the house stays quite warm overall.
We only have one heating circuit, and if we turn down the temperature to make the house cooler overall, the bathroom (with an open shower) becomes too cold. The heating installer said we should not just adjust the flow rates because they were set based on calculations, and these values are important for the BAFA due to the system’s efficiency factor. Whether anyone will ever come to check that in the end? No idea.
The technician from Stiebel Eltron who repaired our unit said that the first year should generally not be taken into account because the building is still drying out. I also notice quite a bit of condensate draining.
We only have one heating circuit, and if we turn down the temperature to make the house cooler overall, the bathroom (with an open shower) becomes too cold. The heating installer said we should not just adjust the flow rates because they were set based on calculations, and these values are important for the BAFA due to the system’s efficiency factor. Whether anyone will ever come to check that in the end? No idea.
The technician from Stiebel Eltron who repaired our unit said that the first year should generally not be taken into account because the building is still drying out. I also notice quite a bit of condensate draining.
Schimi179115 Dec 2020 10:40So, do modern houses today actually no longer have any room thermostats? We still have one in every room. However, they are hardly ever adjusted.
In the living areas, the temperature is around 20°C (68°F). That is our base temperature. Usually, in the afternoon, we turn on the wood stove and increase the temperature by about 2°C (4°F). If it gets too warm, we "direct" the excess heat into the stairwell, so that the upper floor is then around 18°C (64°F). The bathroom temperature is a bit higher.
In the living areas, the temperature is around 20°C (68°F). That is our base temperature. Usually, in the afternoon, we turn on the wood stove and increase the temperature by about 2°C (4°F). If it gets too warm, we "direct" the excess heat into the stairwell, so that the upper floor is then around 18°C (64°F). The bathroom temperature is a bit higher.
Schimi1791 schrieb:
So, are there actually no room thermostats anymore in modern houses today?Individual room temperature control is required according to the Energy Saving Ordinance.
We, 2 adults + child, have been living since September 1st in our 150m² (1,615 sq ft) house, built to KfW 40 standard with a LWZ 5s plus ventilation unit.
In November, our average energy consumption was 16 kWh, and so far in December, it is 20 kWh.
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