Heating combination okay?

That is nonsense.

1. My post clearly referred to your post which referred to my previous post. This post clearly refers to the EP.

2. I wrote "most" single-family houses, and it would be news to me that biomass contributes a significant share to energy generation in single-family houses.

So if you want to be nitpicking, then please do it properly.

To my knowledge, there is no funding for a trench collector.

Why not?

Sorry, that's not true - the sentence is only slightly lower (4,000 euros).

Yes, that was also my understanding.

Brine heat pump in combination with photovoltaic and a small fireplace/Swedish stove is probably more advanced then?

Do you even need a buffer tank or is it enough if I heat my hot water for shower etc. with a heater, or whatever these things are called?

Regards Michael