ᐅ House electricity consumption – what is your usage?

Created on: 6 Oct 2020 06:29
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chewbacca123
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
Nida35a13 Nov 2020 15:23
The heating load, consumption, and energy calculations for the house include the estimated solar gain for each specific window. Therefore, shading is also considered in summer, as no heating output is needed then.
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Zaba12
13 Nov 2020 15:57
Bookstar schrieb:

Why does it even get dirty for you? We actually only need to clean ours once a year with ash. The glass air wash otherwise keeps the glass clean automatically all the time.

...looks like my expensive Schiedel chimney doesn’t do that ;-).

I’ve read about the (glass air wash) feature but don’t know why it works like that. Does anyone else here with a Schiedel know?

@ypg I asked my wife to get some bathroom rugs for winter, or actually they’re already there. But please don’t think of the light blue, green, and red ones from the 1980s.
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Zaba12
13 Nov 2020 16:56
FF2677 schrieb:

I would say the energy input from the sun is greater than from the fireplace 🙂
But I can't back that up with a formula. A quick search on Google didn’t reveal anything about energy input from the sun, only solar heat gain coefficients (g-value) of windows...
It would be interesting to know, theoretically, which should work faster:
16 sqm (172 sq ft) of pure glass surface facing south at a favorable angle in autumn/winter vs. 3-4 kg (6.6-8.8 lbs) of firewood
to warm up 260 m³ (9,180 cu ft) of air (containing about 2.5-3 kg (5.5-6.6 lbs) water per liter) by 1°C (1.8°F).

But as for how it is in practice, we are very satisfied. If there’s too much heat from the sun, the external blinds are closed. And the fireplace can run for hours without turning the room into a sauna.
Heating with only the fireplace probably wouldn’t work (but maybe the fireplace raises the room temperature more if it runs around the clock; we haven’t tested that and don’t plan to). Even if we could heat with the fireplace temperature-wise, it wouldn’t be economically attractive for us since firewood isn’t cheap, and gas is much cheaper in the end.

For me, it’s purely an economic calculation. If electricity were cheaper now, the underfloor heating would run, and maybe it’s also a matter of curiosity to see how self-sufficient (with little or no grid usage) you can get with photovoltaic panels, battery storage, and an electric car.
Besides, if it were -10°C (14°F) outside now, the heating would probably be on already.

As I said, we’ll see.
Today was a good day. The battery is full; tomorrow it’s the car’s turn.

Energiestatistik-Dashboard: Tag/Monat/Jahr/Gesamt mit Eigenverbrauch und Autarkiegrad.
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Lumpi_LE
13 Nov 2020 19:07
Zaba12 schrieb:

I’ve read about this (windshield washer fluid), but I don’t know why it happens. Does anyone else here with a Schiedel chimney know?
I have a Schniedel, but I don’t know either.
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Zaba12
13 Nov 2020 19:14
Lumpi_LE schrieb:

I have a Schiedel, but I'm not really sure about it either.
Hey, I was careful to make sure autocorrect didn’t change Schiedel to Schniedel, and then you come along :-D
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Zaba12
24 Nov 2020 19:15
Wow, that was a disappointing day.
If someone had a 20 kWp system on the roof, they would only generate about 3.2 kWh.


PV system: day and month with self-consumption, degree of energy independence, and CO2 savings (two panels).

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