Heat pump is not compatible with a water-bearing fireplace

So he heats the water up to 75 degrees in summer and we don’t need any electricity.

But you need the water at 75 degrees?
I’d rather take the 8 cents. :D

In plain language, this means that neither your heat pump nor your photovoltaic heating rod can significantly heat your hot water.

No, but the optional heating rod with up to 27kW already makes the buffer tank quite warm. The 27kW could definitely be described as significant...
And thus, the hot water is indirectly heated as well, since it is heated through the heat exchangers in the buffer tank.
I find the question of how the hydraulic integration is actually done much more interesting. For example, like this ?

Again. Please read my post from page 1 and read the technical data of your buffer tank. That should then be self-explanatory.

So self-explanatory that once again you didn’t understand anything.

Found in there. The domestic hot water heating takes place through the tankless water heater principle. You barely have any hot water storage in your buffer tank.

Ever heard of a fresh water station/storage?
Nice thing if you understand it.

In plain language, this means that neither your heat pump nor your photovoltaic heating rod can appreciably heat your hot water.

That’s where it gets so wrong it really hurts.

Can’t you honestly find a forum where things are discussed that you somewhat understand?
With topics like: What are the favorite topics of a parking meter?, or do I react to a sack of rice falling in China?

No, but the optional heating element with up to 27kW already heats the buffer tank quite well. The 27kW could definitely be considered significant... And thus the domestic hot water is indirectly heated as well, since it is heated through the heat exchangers in the buffer tank. I find the question of how the hydraulic integration was actually carried out much more interesting. For example so?

Have a look. This is what we received and I have now added to it. The stove currently has 4 connections; we can choose. It is currently running under "new".

But you need the water at 75 degrees? I'd rather take the 8 cents. :D

This is enough to last through the whole night until morning, then new energy comes.

That's just household electricity consumption.
Or where do you see what the heat pump consumes?

The heat pump just keeps making peaks, which is also called cycling.
It simply can't get rid of the heat because you basically have 90% of the rooms with the handbrake on.

Turn the heating curve down to 0.4 and open the room thermostats, then we'll write again in a month. ;-)

I have done that now, according to your instructions. I'm curious.
Thanks already!!!