Hello,
...For me, a combination of heat pump and solar collectors is energetically far more sensible than if I have to heat electrically.
In principle, that is correct, but:
- a PH partly lives on internal and solar gains
- due to the (expensive) building construction, the heating energy demand is extremely low
So why invest in an again quite expensive heat pump for a heating energy demand of perhaps 2000 kWh/a.
However, the preparation of hot water must not be forgotten. Depending on how high the demand is for this, a heat pump could become reasonable overall. Whether a domestic hot water heat pump is the first choice here across the board would have to be clarified.
Best regards