Photovoltaic system offer for our single-family house

Yep. Leave out storage, but fill the north side completely, or at least one full string (usually around 20 modules). With such a low roof pitch, it’s worth it. Immediately make sure that no satellite dish, vents, or similar are planned in the way of the modules.

By the way, the highest savings effect is achieved by fitting the roof with hooks directly during the roofing. So this should definitely be commissioned in time. If the roof is already covered, it costs a lot of time.

It would be even cheaper if you don’t cover the roof with tiles but with metal sheets. You can’t see it under the modules anyway. The roof lasts longer, is more watertight, tiles don’t get damaged, the roofing is cheaper, and the installation of the photovoltaic system is also cheaper.

Currently, prices around €1300 per kWp can be achieved for systems from 15 kWp. That’s new construction, so it should work for €1000 to €1100. No scaffold, the electrician is already there, savings on the roof... By the way, these prices are not hearsay, I have the offer (with the €1300 on existing buildings) on the table. It’s two weeks old, expensive BaWü.

If the roof is going to be covered at the end of this year anyway, definitely order now! Nothing will surely get better by then, you have to hope that everything arrives on time.

And then it doesn’t matter when you move in. As soon as the photovoltaic system is connected and the electrical distribution box is fully installed, it can go into operation. That definitely helps right away with the drying heating program of the screed! You just have to instruct the electrician accordingly...

Deliverer is the expert here and has already said everything.

I also consider the 1600 EUR to be exaggerated in the current times, especially since scaffolding etc. are not included or can be saved. I would personally reject anything over 1500 EUR immediately as "not serious." Whether it will get better in the coming time, of course, remains to be seen.

You still have to "revise" the north side. Also, take a little time to look into the module alternatives and their sizes, whether a more sensible layout (south side) might be possible. We don't know them here ....

If hooks can be installed on the roofing, that is of course optimal, but ultimately not a huge effort if the solar installer takes care of it directly. The 10 kWp with hooks installed etc. should actually be finished completely in one day, max. 1.5?

Deliverer is the expert here

I’m actually blushing! :) So no, I’m not an expert, rather a big fan of photovoltaics. But I know the basics and already have 1 kWp on various roofs. So please feel free to question everything – most things can be calculated. Avoiding sitting hooks saves – roughly estimated for 10 kWp – one man-day. That’s 500 euros. Whether you can pass that on is another matter...

One small tip, if the system is really going to be operational this year, register it only in Jan.23 . This way you get a full year more feed-in tariff (calculated over the 20 years). :)

So no, I am not an expert, rather a big fan of photovoltaics.

My life experience tells me that many a "big fan" is a significantly more competent expert than some experts who go through a run-of-the-mill routine day in, day out ;)

That is why I referred to you as an "expert here in the forum" :)

one last tip, if the system is really going to be operational this year, register it only in Jan.23 .

I wouldn’t sign off on that 100%… with the feed-in tariff <7 cents, I would rather focus on high self-consumption asap. So especially heating up the screed, etc.
So not necessarily wait until 2023 but connect as soon as possible.