Smooth roof tile or curved roof tile?

I believe by Glatt he meant the shape, not the surface, so rather flat, without curvature.

Sorry, I meant the "smooth, glazed" surface. You will be right. ;)

I cannot support the suggestion to choose a zinc or aluminum roofing here because it is significantly more complex, and thus also more expensive, to install a photovoltaic system here.

Why is that? No tile tetris, no roof hooks, less leveling, no grinding. On small carport roofs, you can even save the substructure.

Why is that? No tile tetris, no roof hooks, less leveling, no grinding. On small carport roofs you can even save the substructure.

A zinc/aluminum or copper roof in standing seam design is boarded. That alone causes higher costs. How should one save the substructure? Are the photovoltaic modules supposed to be glued to the seams? I would really like to see that. What exactly is tile tetris?

A standing seam zinc/aluminum or copper roof is ventilated. That alone causes higher costs.

If you could elaborate on that, I would appreciate it.

How should one save on the substructure? Should the photovoltaic modules be glued onto the seams?
I would really like to see that.

Actually, gluing works, I have already done that on a motorhome. For a carport, though, I would rather screw them on. And yes – just on top. There are mounting systems for that. Unfortunately, I am not allowed to link them.

What on earth is tile tetris supposed to be?

Raise tiles, place roof hooks, cut, put tiles back in. If it goes badly, half of the ridge has to be uncovered. There is often a lot to do at the eaves as well. For me, surely 5% of all tiles were removed once. That part took the most time. With a metal roof, you simply screw through it, which saves a lot of money and time.
However, I don’t have the aluminum or copper you mentioned here. It wasn’t supposed to be especially expensive. ;-)

A standing seam covering always requires a full boarding. On top of that, a random fiber studded membrane is applied to prevent drum noise. Only then can the sheets be installed. The standing seam covering needs a solid and full-surface substrate.

Gluing on a motorhome with a small module may possibly be feasible. For a roof where the modules are 1.5 to 2 sqm in size, this is absolutely wrong and not according to the technical rules. The wind suction is far too strong for gluing.
There are the most adventurous installations. As an expert, I am always very pleased about that. That way, the work never runs out.

Screwing through a "metal roof." For God's sake! That makes the entire sealing leakproof.

The ridge remains completely unaffected during photovoltaic installation. There are minimum distances that must be observed to the roof edges.
Of course, tabs are ground off to mount the holders. This only serves the rainproofing of the roof. That has nothing to do with Tetris.
The important thing is that the roof is perfectly sealed again after the photovoltaic installation.