Photovoltaic system, how to use experiences like heat pumps?

always these theoreticians

30kWp is the installed capacity that the system can produce at maximum. However, I have never reached that. The highest I ever had was 29. The yield over the year also depends on the hours of sunshine and the outside temperature. The colder it is, the more power is produced when the sun shines. And as my logger shows, in favorable years, more than the theoretically usual hours of sunshine in our latitudes can accumulate. That's why all these calculation games are only theory. If you calculate with 950 hours of sunshine, you will find that the systems can produce more because the sun doesn't care about our theory.

Look on various sites where people publish their system yields, you can see that quite clearly.

Here is how an ideal day progresses. It is a day in July. The red line is the daily forecast, which largely corresponds to what is predicted with the 950-hour forecasts. As you can see, the course of power generation is not linear.

If the outside temperature had been lower, you would definitely have seen the peak near 29 kW on this day. However, the system only reaches this in months when the temperature is rather cold. Possibly April, maybe even May. But there are then days where nothing works at all, which pulls the average down again.

Theoretically, this shows that you can say and calculate a lot, but how it really looks in reality, no one can tell you in advance. There are simply too many factors that influence it.

With photovoltaics, you also have the dilemma that when you really need the electricity for heating and so on, the system does not deliver appreciably.

Here is how it looked for me in 2015. You can clearly see that the actual 'hype' goes from March to August.


That is why I would not focus solely on the combination of photovoltaics and heat pumps.

Although with today’s houses, the energy required for heating is decreasing more and more.

One more thing about costs as I see it. My pure production costs calculated based on purchase costs and electricity production calculated over the depreciation period are about 8 cents per kWh. That’s how I account for it internally...

So, after the thread has been hijacked long enough...

Do you pay 27 cents per kWh

Almost, it’s 25-point-something ct.

How do the costs of €864 break down?
Depreciation over 10 years + interest + X?

You should know that depreciation is an expense but not a cost. The €864 is what the bank receives from me as full financing, including interest.

You also run your heat pump (heating + water) via the photovoltaic system – of course, that achieves even higher self-sufficiency.

In summer there’s not much heating here, and of course the winter is still missing.

who then pretties up the result

The pool is just there. It doesn’t pretty anything up but was consciously taken into account. At least photovoltaic makes sense for that, unlike photovoltaic + heat pump.

Of course he embellishes the self-consumption rate... Hardly anyone has that, so statements like "someone should try to copy me" are a bit odd, because it makes it even harder to compare.

Thank you for the answers.

OT

You should know that depreciation is indeed an expense, but not a cost.

The definition of the terms is somewhat dated, but to my knowledge, depreciation is both. (Expense in external accounting and cost in internal accounting). It is just not an outlay.

The €864 is what the bank receives from me as full financing, including interest.

That, on the other hand, would be outlays.

Of course he's embellishing the self-consumption rate....

Well, in the Duden it says: "schönen"

1) -to clarify
-to remove turbidity from cloudy liquid

2) to make something appear nicer, more pleasant, better [than it is, editor's note]
e.g.: to embellish the result of an election; an embellished balance sheet

Since I assume you mean 2), you imply that a pool manipulates something like that. But since it is a fact that I have not "forgotten," there can be no question of embellishing. Please check your future use of this word.

And hardly anyone has a pool? I don’t know where you live, but I count 17 pools in a fairly small area...