Thanks for sharing @MyForest, yes I can imagine 14kW for DHW is going to push those temps up quickly!
Do you have a large surface area coil or external heat exchanger? What is the deltaT between the max flow temperature and the DHW cylinder temp that you usually set it to reach?
Here’s my flow temperature and DHW cylinder temp about 3/4 of the way up, suggesting an average DeltaT of 7.0K. The difference between the average coil temperature and the DHW cylinder temp is about 4.5K…
It’s great to see your results in your other post here showing how you have managed to improve the COP using your control algorithm, great! Heat pump experiment review after two years