Hydraulic balancing air-water heat pump + efficiency circulation pump

Thank you very much for your effort. I will definitely read some of it again when my heat pump is installed in the house and I start the optimization. Then I will certainly contact you again. It is very pleasing when initial expectations later work successfully in practice. Perhaps it is good for a photovoltaic system operator to not only keep an eye on the heat pump with its parameters during optimization. Cycling can be reduced via the energy integral of the heat pump or in parallel also through consistent implementation of blackout periods, or or... Surely there are many more adjustment options. For our own house, I am interested in the possibilities and limits for the priority use of the heat pump using the photovoltaic system. Less is possible from November to January, but the forecast still predicts a yield of 1,200 kWh combined for these 3 months. How much of this can be consumed by the heat pump and how much by household electricity itself? In October the forecast is 880 kWh, and for February 608, and in March already 1,110 kWh. Instead of 6.5 cents/kWh feed-in, the consumption of about 35 cents/kWh should be reduced. Overall, I assume an annual electricity consumption of 4,000 kWh. Of this, half each for the heat pump and household electricity. Through the one-time investment in a photovoltaic system (net about 11,000 euros for a 13.68 kWp system), I want to have virtually no costs for electricity for the heat pump and household for the next 20 years after offsetting the feed-in. Is that realistic? Of course, no one knows the possible development of electricity prices.

I wouldn’t rely on forecasts, but rather wait and see what is actually possible in reality and then form an average or middle ground after 2-3 years.

You have to think carefully or try out blocking times to reduce cycles even further. But I also have to say that I haven’t tried this consistently enough yet.

It would be nice if you could define more switching cycles in the Vaillant control system.
I think there are only three definable switching cycles per day, one of which would be lost if you want to work with night setback. You can still play a bit with the reheating function from a certain temperature, but I don’t have a concept in mind yet.

It doesn’t help me if I run the system with a night setback or turn it off at night to then heat with higher flow temperatures during the day.

So I run with a higher flow temperature from 6:00 to 13:00 to use the photovoltaic system and higher outside temperature and compensate for the night setback. Now comes the but: "the government comes home around 13:00 and it is too warm for her in the house, so the heat stored over the morning is ventilated out again."

I wouldn’t rely on forecasts, but first wait to see what is actually possible in reality and then form an average or middle ground after 2-3 years.

You have to think carefully about or try blocking times to reduce cycles further. But I also have to say that I haven’t tested this consistently enough yet.

It would be nice if you could define more switching cycles in the Vaillant control.
I believe there are only three definable switching cycles per day, one of which would be lost if you want to work with a night setback. You can still play a bit with the function of reheating above a certain temperature but I don’t have a concept in mind yet.

It doesn’t help me if I run the system with a night setback or turned off at night to heat more during the day with higher flow temperatures or counter heating.

Then from 6:00 to 13:00 I run with a higher RT to use the photovoltaic system and higher outside temperature and compensate the night setback. Now comes the but: the government comes home around 13:00 and it’s too warm in the house for them, so the heat stored over the morning is ventilated out again.

I think the software from Valentin is sufficiently accurate to prevent the forecast from becoming a disaster. Of course, there are annual fluctuations... but over several years these even out. I can’t say anything concrete yet about the possible switching cycles. I see opportunities in using photovoltaics. Producing hot water during the day makes much more sense. Efficiency in heat generation is also better during the day. I have all exterior and interior walls made of sand-lime brick, plus 70 mm of cement screed. So plenty of thermal storage. A moderate increase in flow temperature during the day will bring two advantages: better efficiency because outside temperatures are higher, and then chances to use photovoltaics. Then fewer cycles at night. This will work better during the transition period compared to temperatures near the NAT.

Through the one-time investment in a photovoltaic system (net about 11,000 euros for a 13.68 kWp system

May I ask how that is possible? A lot of electricity?

And 2000 kW for a house, wait, when children are there, then it will be double that.

May I ask how that is possible? Lots of electricity?

And 2000kw for a house, wait until there are children, then it will be twice as much.

Waiting is no longer an option... from time to time our grandchildren aged 10 and 8 come over...
Purchase of a full pallet with 36 modules each 380 W Trina TSM-380-DE09.05 Fullblack, gross price per module 141 euros, purchase of inverter SMA STP 15000TL-30 and Sunny Home Manager 2.0, purchase of mounting system and small accessories, all via the internet and thus transparent price comparison. Order for mounting the mounting system to a self-employed solar technician, billing according to number of modules. Installation using the existing construction site scaffolding (exact scheduling was necessary, max time one week after roof acceptance). Registration and commissioning by a specialized company (electrical installation).

Waiting is no longer an option...every now and then our grandchildren aged 10 and 8 come over... Purchase of a full pallet with 36 modules each 380 W Trina TSM-380-DE09.05 Fullblack, gross price per module 141 euros, purchase of inverter SMA STP 15000TL-30 and Sunny Home Manager 2.0, purchase of mounting frame and small accessories, all via the internet and thus transparent price comparison. Order for mounting the frame to a self-employed solar installer, billing according to the number of modules. Installation using the existing construction site scaffolding (exact scheduling was necessary, maximum time one week after roof acceptance). Registration and commissioning by a specialized company (electrical installation).

Congratulations that you were lucky enough to find someone like that. In our area, it is more like "If you buy that stuff on the internet, then you'll find someone on the internet to install it for you" or "I can install that stuff for you but without any warranty; if you want it installed with a warranty I have to charge double."