Photovoltaic system orientation

Hi,

here is our layout.
Why don't they want to include the south?
My rough planning of yields according to PVGIS:

Layout	kW installed	Yield_Planning kWh
West 55	3.84	3722
South -35	2.88	2984
East -125	3.2	2200
Total	9.92	8906

Looks good, no idea why they only want to do 2 pages for us, probably it's less work and saves costs by only climbing around on 2 roof surfaces.

They are so clueless anyway... We should inform them when our roofer comes, then they wanted to send a colleague who would install the holders. So said, done, informed them 3 weeks before the start of the roofing work, that was November. Sent the roofer's contact details by email, no one ever contacted the roofer, so a few days later we called and asked what the problem was. Then they said it was way too short notice and you can't get a colleague assigned that quickly.

Then we thought, well that's your problem then, you just have more work. The scaffolding was dismantled on 31.01 and now on 10.03 they suddenly remember that the roof is already covered and there’s no scaffolding left. Now they suddenly want to make that our problem....

We signed the contract with them in December 2018. They should have started in October 2019, but because of a 5-week delay on our side, suddenly there were no capacities available in 2019 and we had to wait until now....

So we have now clearly received the statement that 3 pages would not be possible since the inverter only has 2 inputs

: Have you asked about the additional costs for a larger inverter, that is, with more than 2 inputs? That would interest me.

No, I didn't explicitly ask for that afterwards. I only asked if it might possibly make more sense to use the smaller instead of the larger area. Then they said they wanted to check to additionally use the smaller area. Two days later, the statement came that you can't use three roof areas because the inverter only has two inputs.

However, we were now advised against the LG battery and towards the one from Viessmann devices, which is more expensive and larger, but can be upgraded later. We would now get only 7.8KW instead of 10KW for the same price or have to pay more for 11.xx KW.

The Viessmann inverter is apparently supposed to be integrated right away, maybe that's why?

I’ll join in here....

Roof construction and orientation absolutely identical to the OP. After initial talks with the solar installer, we are getting a maximum of 5.84 kWp on the roof (with 18! modules - 6 modules on one roof side).
Honestly, it puzzled me a bit that there can be so few modules per side).
To be installed: Sharp NU-JC 320 + storage BYD Box LV

What is your opinion? 6 on one roof surface correct?
The solar installer assumes an average of 850 sunshine hours per year.