Operating data of a 10 kWp system. Exchange of various data

Who among you has purchased a photovoltaic system with 9-10 kWp in recent years and would be willing to share some operational data?

I would find the following data interesting:
- Location (city or region)
- Roof orientation
- Annual electricity production in kWh
- Of which annual self-consumption in kWh or in %

Where is the difference to a 5kWp system? You can also scale that up to 10kWp.

The yield should be similar everywhere, provided there is no individual shading. Every calculation program for photovoltaics has more data than any collection on the internet.

And lastly: self-consumption is something to be viewed individually and is not really comparable.

The annual electricity production in kWh for the 10 kWp system is exactly twice as high as for the 5 kWp system. The self-consumption cannot be converted that easily.

I am asking about the annual electricity production because we have two offers, one was calculated with 730 kWh/kWp, the other with 890 kWh/kWp.

The self-consumption share is calculated sometimes with 35%, sometimes with 43%.

Both energy consumption values are, in my opinion, overestimated, or is storage included? What consumption values for household and heating are assumed overall?

Energy consumption values are not comparable anyway, as they depend heavily on the base load, the annual distribution, and the daily distribution.

To reach 40% with a 10kWp system, in my opinion, you need to run an air conditioner, a pool, or a cold storage in the summer.

Yes, the values for self-consumption also seem deliberately chosen too high to me, in order to embellish the profitability calculation (which is actually not necessary). The self-consumption share calculator by Volker Quaschning yields an average value of 20% for our configuration.

You can verify the yield forecast yourself with pvgis (google)