Limit on number of SCCs/strings? Victron or EG4

As I plan out our new (hopefully off grid) house, I see that I have room for quite a few strings of panels mounted at various angles and orientations to optimize sun position and season. I want to use either ground mounts or mounts on only the steepest portion of the roofs (e.g. steep angle of the gambrel roof on the barn because of snow (we're in Maine).

For example, I could fit 6-7 450W panels on the steep portion of the gambrel roof of the barn, another 6-7 mounted vertically on the side...

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