question

14 panels is an awkward number since you can't make all of the serial strings identical and keep under the 250V. You can't have mismatched numbers in a serial string, as you can see the Voltages are different.

So you are pretty much forced into using two charge controllers. Two strings of 5 into a 250/70 would work pretty well. This array could make 80A at times, but mostly it will be under this so a 70A controller would be a good compromise. Go for the 250/100 if you don't want to compromise.
Then the one string of 4 would need to go into its own controller which would need to be a 250/60 since this is the smallest of the 250V versions. A string of four is too much for a 150V controller.

Another option is to use a MPPT RS 450/100. This model has two trackers. At total charging current of 100A it would suit your setup pretty well.
You could configure two arrays, each as a string of 7 panels into each tracker.
The only caveat I can see is that the MPPT RS can only go up to 60V Absorb Voltage, if your battery needs a higher Absorb Voltage setting, then this would not suit you.

Hi @Jochen K

The terminals into the devices shown are MC4 pairs, rated at 30A each, so you can have more than one solar string into each pair.

The calculator is adjusting Voc for the ambient Temperature you've given it. So you can't have 5x in a string. 4x max.

14x panels is a bad number, only divisible by 2 or 7. 7x per string is actually possible into the RS mppt, but the calculator seems to mislead with this It will show RS if one string entered, but it has 2 trackers, which aren't allowed for. So it could handle all your panels in 2 strings.

2x panels/string may be borderline in poor light. Might be ok, and if you have a stray couple you could try it into a separate (& much smaller) mppt. So maybe 4S3P into a 250/85 and 2S1P into a 150/35 (underutilised but fits). Don't mix string lengths into one mppt.

Edit: Crossed with wkirby, but I'll leave it..

Thank you, mates!

Checked with my friend planning the panels again.we have two roofs, one with 6 modules, the other one with 8. Thats the reason for the weird 14 in total. So assuming, the split to 6+8 is a necessary information for you guys.

If I understand right, I could use one 250/85 and one 150/60 then but also the RS would be an option.

--> any recommendation from you guys what's the right way to go for me?

My battery is a DIY 48V / 28.8kWh built with 32 EVE 280, so no issue with the 60V absorb voltage.

Attached a photo of the extension....(if I manage to get it uploaded here at the ⛱️) - now back from beach, should work now :)

P.S.: of course the house if equipped already

Hi guys, I am back from vacation!

Indeed further upgrades in the future (smaller ones) might be an option.

So what you're saying is I should take 2 x 250/60 to be on the safe side, alternatively an RS with two trackers included.

Help me out: The RS is available as 450/100 or 450/200. What do I need? Sorry if this question might be stupid?! The RS can handle way higher voltage, meaning I could do different wiring with higher voltages and lower currents?

Another alternative is this:
https://mppt.victronenergy.com#djE7Y3VzdG9tLDcsMSw1NCwtMjAsNzAsNDgsMTAuMzIsMC4wNSwxMC43NCwzOTUsMzguMjksLTAuMzUsNDUuNiwyMCw2O2N1c3RvbSw3LDEsNTQsLTIwLDcwLDQ4LDEwLjMyLDAuMDUsMTAuNzQsMzk1LDM4LjI5LC0wLjM1LDQ1LjYsMjAsNg==

1 string of 7 series connected panels in MPPT tracker #1 of the RS 450/200
1 string of 7 series connected panels in MPPT tracker #2 of the RS 450/200

This would not have any limits as per the calculator.