ᐅ House electricity consumption – what is your usage?

Created on: 6 Oct 2020 06:29
C
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
A
Andre77
16 Dec 2020 20:27
@halmi

Could you please check how your consumption statistics appear in the SMA app? Like this:

Daily energy consumption profile (kW) on 16.12.2020; red and green areas indicate peaks.
H
halmi
16 Dec 2020 20:35
The last two days

Energy balance diagram on December 15, 2020; red consumption areas and green portions throughout the day.


Daily consumption diagram, 16.12.2020: red consumption areas, green generation.
A
Andre77
16 Dec 2020 20:40
halmi schrieb:

The last two days
Ah, thank you. So you also have a fairly constant consumption that doesn’t significantly drop in the red zone outside of the photovoltaic production times.
Z
Zaba12
21 Dec 2020 08:46
Hello everyone, I am currently optimizing my heat pump with the help of halmis and would like to get some opinions. The settings are as follows,

- Main valve closed and ERR fully open
- Domestic hot water at 48°C (118°F), hysteresis 6K
- Heating curve 27/21/0, hysteresis 2K for 1.5 days, resulting in a target return temperature of 25.9°C (79°F)

2-3 hours heating operation and 4 hours pause

Upstairs temperatures in °C
- Child 2: 21.2
- Child 1: 20.9
- Bedroom: 21.3
- Office: 22.2
- Bathroom: 21.5

Downstairs temperatures in °C
- Living room, kitchen, dining: 23.9
- Cloakroom & hallway (sliding door closed to living room): 23.5
- Guest bathroom: 20.5

This results in 25 kWh per day of energy consumption just for the heat pump, which I find too high.

Changes since today at 8:30 a.m.
- Domestic hot water 48°C (118°F), hysteresis 7K
- Heating curve 26.5/20.5/0, hysteresis 2K, resulting in a target return temperature of 24.9°C (76.8°F)

From my point of view, all temperatures will drop by about 1 degree. Upstairs probably less than downstairs because it is open to above.

But 22.9°C (73.2°F) downstairs is still too high, so my question is: I should only need to increase the flow rate in liters per minute depending on the length of the heating circuit that is too long downstairs by adding it to the upstairs circuit, correct?

Also, I want to prolong the heating cycles! Have I perhaps already initiated this by lowering the heating curve?
H
halmi
21 Dec 2020 08:50
How many heating cycles did you have in the last 24 hours?
Z
Zaba12
21 Dec 2020 09:00
5 cycles and the outside temperature according to the heat pump is -0.5 degrees Celsius (31°F).
Additionally, the temperature difference during heating operation is 8 degrees Celsius (14°F), for reasons unknown.