Is a photovoltaic system also sensible in the West or East?

Oh dear, I signed up for that. I have to admit that the concentrated information completely overwhelms me. I will look for our plans with the roof sizes, etc., and then cautiously ask my beginner questions. We also have a garage with a gable roof and east orientation. The house is in the west.

Read the FAQ of [Pflanze]. Erase storage and set all surfaces. If you are diligent, start experimenting with the occupancy. That would be a good start there

Read the FAQ from Pflanze.

That's exactly what I just did and was overwhelmed.

Clear memory and set all areas. If you are diligent, already experiment with the allocation. That would be a good start there.

Yes, I can certainly find out the areas, but I wouldn't even know how big a module is, whether they are all the same size or each different, whether distances have to be maintained, etc. I'm really starting from zero. ops:

1.7x1 meters are standard. About 1cm gap or so between the modules. A bit more towards the edges, maybe 20.. there are also some rules about that... first check roughly what is possible.

There are also other module sizes if necessary.

East-west systems work great. Although you don’t get the maximum yield per sqm, without storage you have more hours for self-consumption than with a south-facing system. It’s not that difficult. Your roof is as it is. As far as panels and electronics, storage, etc. are concerned, you will encounter "Glaubenskriege".

Do the panels actually differ significantly in terms of efficiency? Is it worth looking up the "best" / most effective ones on the Internet at the time of installation and telling the installer to please order and install these? Or I rather think you just take the panels recommended by the craftsman and that's it, because the differences are so marginal.