Solar (thermal) and/or photovoltaic - who has experience?

Hello,

after several conversations with different experts, we are now quite confused.

Background:
Our house (basement, ground floor, upper floor with a total of 200sqm of living space) has a shed roof with a 12.5° pitch facing northeast.

The first expert recommended an additional solar system alongside our air-to-water heat pump; the second considers this complete nonsense because we would then a) constantly have uselessly hot water in the buffer and, if things go really badly, it would "cook" the seals on the roof while with photovoltaics we would be more flexible and could use the energy for heating but also for feeding back into the grid when the buffer is full...

That means the second expert predicts constantly unused hot water and massive problems with such systems anyway and advises photovoltaics.

What do you think?

Best regards

If inclined to the northeast, I would not put anything on it at all.

With an air heat pump, definitely photovoltaics!

But north roof 12°? Phew
What about the south roof?

Is, as written, a monopitch roof; insofar there is "no" south roof...
Otherwise one could at most raise it, but whether that is "nice" is questionable.

Should it be beautiful or functional?

Who planned the house so that this technology is now supposed to go on the "wrongly" oriented roof?

That's just nonsense.

It was probably planned by the architect, who else...
It is supposed to be functional but certainly not ugly because of that...