ᐅ Experiences with PVT Systems and Ground-Source Heat Pumps?

Hello everyone,

We are planning to build a single-family house of about 130-140 sqm (1.5 stories, roof oriented east-west, 4 people). It will have a photovoltaic system on the roof and a heat pump for hot water and heating (underfloor heating or heating/cooling ceiling). A fireplace for enjoying the view of the fire will also be included.
I am considering several options:
1. Photovoltaics only + air-to-water heat pump
2. PVT panels + ground-to-water heat pump directly
3. Photovoltaics only + solar absorber + ice storage + ground-to-water heat pump

I understand that the costs vary significantly here. Since I believe we will need more cooling during summer in the future, option 3 is my favorite.
Do you have other ideas or experience with these components? Simple fireplace or hydronic fireplace? Cooling ceiling or underfloor heating?
Looking forward to your feedback.

Of course, it also depends on the insulation standard and so on, but basically option 1 is a good choice. It is affordable, flexible, and well tested. Options 2 and 3 sound very experimental. For cooling, it is better to use a standard air-to-air heat pump (air conditioner).

It is best to avoid having a fireplace in new construction.