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

We have everything in beige, which is very comfortable. Even in the height of summer, the terrace only gets pleasantly warm.

The heating now runs every other day for just a few hours. We should be finished soon...

Bookstar schrieb:

You derive this from your offer? Is that your data basis valid for all of Germany? Seriously?

The assumption of 800 kWh/kWp is also not exactly valid across all of Germany.
But since with full feed-in (which nobody really recommends anymore) it’s more or less a break-even scenario, even a bit of self-consumption helps. Unless the electricity price drops below 0.08 €/kWh on average for the next 20 years.

Conversely, you can simply calculate at which kWp price you reach the break-even point:

Price_threshold = Yield_per_kWp_per_year * Feed-in_tariff * Tariff_duration

Yield_per_kWp_per_year is 800 or in other places rather 950+ kWh/kWp -> this can still be multiplied by a factor like 0.95 to account for the average yield over 20 years (degradation)
Tariff_duration is the 20+ years (the current year also counts, if I recall correctly).

tomtom79 schrieb:

Since the topic often comes up regarding solar yield and which color the patio slabs should be

3 measurements on the subject

1x Tiles inside the house in anthracite behind the window

Do the panes still have a significant damping effect?

What about the 70% maximum feed-in? Do you have to use 30% yourself?

Bookstar schrieb:

What about the 70% maximum feed-in? Do you have to consume 30% yourself?

There are different variations.
First of all, with the 70% limit, you don’t really experience significant losses because output above 70% is only reached at relatively few times.
Usually, the 70% is softly regulated. This means that a maximum of 70% of the system’s capacity is fed into the grid. If you have self-consumption before the grid connection point, you can of course draw power for that (at least the house’s base load). Hard regulation means that actually only 70% is passed on directly through the inverter ==> in reality, this means you lose about 5% of the annual yield with a good south-facing orientation. However, this saves you from buying a smart meter.
There are also solutions using ripple control receivers. However, these are not cost-effective for small systems due to relatively high expenses.

70% softness and good is fine. The normal base load, at least for me with 350-400 Wh, will never cover the peak. But there are enough appliances that can be run alternately around midday: washing machine, cooking, electric car, dishwasher, hot water, etc.

And this has only been the case since mid-April. It continues like that until mid-September. With the heat pump in heating mode, you don’t need to worry about this anymore.