Have you set the hot water (domestic water) to 65°C? That also costs an incredible amount of electricity. It’s enough to occasionally heat it that high and otherwise set it somewhere between 45-50°. Whatever is sufficient for you for showering, etc.
I think the confusion arises because you have 2 different circuits. You don’t drink the water that runs through your underfloor heating. So your domestic water is a different system. However, I don’t know what kind of storage tank you have / how it works. We have a buffer storage tank that is purely for the underfloor heating. So the water in the buffer tank is not used for domestic water in our case. But that could be different for you.
That means, even if your domestic water is at the right temperature, it could be that the heat pump kicks in to increase the flow temperature for the underfloor heating (as Rotormotor said). Since your flow temperature for the underfloor heating is around 27 degrees, I rather suspect the domestic water. What is the setpoint there? Every degree less for the domestic water setpoint saves real money.
Here’s an excerpt from our table showing what the heat pump consumed daily. The 19.5 is an outlier, that’s the day when the plasterers had sealed off the outdoor unit for us. =D That is also still rather high for the current outside temperature, but we just moved in and the house is still damp.
