Air-Water Heat Pump: Ices up, Noisy, Continuous Load?

Even though it took a long time: Here is the long-term experience. Everything is still running, no malfunctions or error messages, it simply does its job. It was maintained externally once, otherwise I take care of it, and once a technician from the manufacturer came for inspection and possible optimization. Currently, after a little more than 3 years (and 3 winters), the consumption is about 8.2 TKW, of which about 2.2 TKW goes to hot water (at 18 cents/kW). I think I can live with that. What do you think? As of now, everything is finished inside as well as the outdoor areas, we are thinking about solar support. We’ll see...

Solar support?
Do you mean solar thermal? Then leave it.
Photovoltaics? Then do that.
Heat pumps are a low-temperature system, solar thermal is a high-temperature system. Combining them means installing a mixer. That only creates hydraulic problems. If your heat pump is running well now, better don’t touch the system. Incidentally, you will hardly be able to save the investment in solar thermal.

8200kw is running well for 140m2? Oh my goodness! You have about 50% optimization potential! Nothing is set correctly at all. Look in the forum, there are good guides. I also had to adjust everything myself and in the end got 35%.

In three years ...I hope that is the sum.

I hope so too. Otherwise, that is a whole lot for one year!

He writes tkw "thermal kW" presumably he does not mean electricity consumption because that would be extreme. But how the heck do you find electricity providers with 18 cents? According to Check24 and Verivox, in our postal code area, 23 cents is the cheapest.