Interpreting Tristar MPPT 60 calculator results?

[Blues Skies]

This was the results of the calculator for my panels. I have four. Do these results mean I can (barely) use 4 panel if run two of them in series? And that 4 of them in parallel is out of the question? Thanks for any input!

mppt calc 2.png

[Mike90250]

Yes, I believe so. 2 panels in series to give you 108V and parallel with another 2 panels in series.

[littleharbor]

What is the voltage of your system and why do you say "barely"?