Redundant heating system for water-carrying pellet stove?

There are houses built with very little mass that warm up again very quickly because the components do not store/absorb much heat. However, this is not typically how houses are built in DE. If it is only about 2°C, that might be possible... But then the effort is not worth it at all. Hot water costs 7.5€ to 15€ per month – you can't save more than that. The cost for the 2°C was indicated by as 30 kWh at his place – so 7.5€ in a winter month. For an average of 100€ per year, you are driving this expensive and maintenance-intensive effort.

A heat pump naturally fits perfectly with a photovoltaic system to use the generated electricity for self-consumption. To optimize this, the systems can be coupled, but this involves additional technical efforts, etc. The simple option would be to set blocking times in the heat pump or specify concrete times when heating should occur, for example, charging the hot water storage at 12 noon, recharging once before sunset, and starting over again the next day. Keep in mind that in a KFW 55 house with controlled residential ventilation and heat recovery as well as surface heating, you could switch off the heat generator for hours without even noticing (item to be removed from the list: room thermostats for underfloor heating). Against this background, you should consider your stove and restrict the requirement purely to aesthetics and ambiance. Economic efficiency no longer plays a role here.

Mentally remove the pellet stove and describe openly what kind of ambiance (what type of warmth) you would like to have in the living space.

The standard solution seems to me rather: heat pump (either trench collector water or air-water) with underfloor heating, optionally supplemented by photovoltaics.

There are no stupid questions

One simply cannot argue about the meaning and pointlessness of certain things.
There are so many things in life that simply make no sense, but you just do them

That is why only the question remains... if we already want to have a pellet stove, how can we best include it or better said.... how can I justify it to my conscience

You simply cannot argue about the meaning or meaninglessness of certain things. There are so many things in life that simply make no sense, but you just do them

That is why only the question remains... if we already want to have a pellet stove, how can we best incorporate it or rather... how can I rationalize it for my conscience

The gist here is that it makes no sense to include the pellet stove in the heating system. Therefore, the only option is to forgo integration, or the first sentence from you that I just quoted applies.

To say it again, the pellet stove is nonsense in terms of "heating the house." These punctual, high heating outputs are pointless in a highly insulated new building. Warm water pockets and other crutches don't help either. Build yourself a stove for the ambiance and make sure its heating output is as low as possible.

First of all, many thanks for your numerous responses

Well, it's a pity if I can't use the pellet stove meaningfully, but that's no big deal and certainly not a reason not to get one

Mentally erase the pellet stove and describe openly what kind of ambiance (type of warmth) you would like to have in the living area.

Personally, I don't need it that warm, but for my wife it only gets cozy from 24°C and I simply like the atmosphere. I don't want to go into that any further now

The costs for the 2°C were indicated by @@Saruss at his place as 30 kWh – so €7.5 in a winter month.

30 kWh with which heating system and what thermal standard of the house?
I have often read about exorbitant electricity costs due to supplementary heating of controlled residential ventilation or inefficient heat pumps in winter. I would like to counteract that somewhat with the pellet stove.

Would it maybe help a little if a suction system of the controlled residential ventilation was installed above the pellet stove?

The simple option would be to set blocking times in the heat pump or specify concrete times when heating should take place, e.g. loading the hot water tank at 12 noon, recharging once before sunset, and starting again the next day.
Keep in mind that in a KFW 55 with controlled residential ventilation and heat recovery as well as surface heating, you could switch off the heat generator for hours without noticing it at all

That's how I could imagine it too.
Would a buffer for domestic hot water be necessary for that or can you do without it?
The surface heating also serves as storage.


Kind regards
Judyyy