ᐅ Air-to-Water Heat Pump: Current Consumption and Data

She is a she 😉, and I don’t have a separate meter for the air-to-water heat pump or for gas. The amount posted back then was from the days when it was really freezing cold here by local standards. I take photos of the meter more or less regularly and record it in an Excel spreadsheet:

User0815 schrieb:

It’s a she 😉, and I don’t have a separate meter for the air-to-water heat pump or for gas. The amount I posted back then was for the days when it was really freezing cold here by local standards. I take photos of the meter more or less regularly and record the readings in an Excel spreadsheet:

If you have a photovoltaic system and that is the grid import meter, then the numbers could make sense. But without photovoltaics, there is no way to achieve these figures with an air-to-water heat pump and household electricity. Absolutely no chance. On those two days, my total household consumption was 53 kWh, which is 2 kWh less than you had at that time. I already posted my grid import including photovoltaics.

This is total household consumption since May 6 with photovoltaics and storage:

I admit it, I have a ground source heat pump. But I also have 170sqm (1,830 sq ft) in the generally cold Hochsauerland region. Total electricity consumption (heating, ventilation, hot water, household) since moving in on November 23 is 1,713 kWh. Photovoltaic self-sufficiency during this period is only 43%, as December and January were really gloomy (for comparison: February 71% and March so far 87%).

Hangman schrieb:

I admit, I have a ground source heat pump. However, I also have 170sqm (1830 sq ft) in the generally “butt-cold” Hochsauerland region. Total electricity consumption (heating, ventilation, hot water, household) since moving in on November 23rd is 1,713 kWh. Photovoltaic self-sufficiency during this period was only 43%, as December and January were really gloomy (for comparison: February 71% and March so far 87%).

I find 71% for February remarkable, especially since you probably had snow on the roof. Even if you can’t fully assess it yet, the figures are very good. From the time change in spring or in April until early October, you will effectively be 99% self-sufficient. For March so far, I am at 91% self-sufficiency myself, but February was only 42% due to snow on the roof.

The snow mostly reduced the yield rather than the self-sufficiency: the snow-free areas and the diffuse light were usually still able to cover the own consumption to some extent. Thanks to the 38° south-facing roof, the snow melted quite well. It was probably only four or five days.

With the photovoltaic figures, the thread loses some impact, as no energy consumption can be tracked at all anymore. It is the same when combined with household electricity since it is completely subjective and depends on many factors (sauna, electric car, refrigerators, etc.).