Some of them, Flux, like the Soladin 600, are designed to be paralleled on both sides AFAIK,
and have a lowish (~50V?) minimum MPPT voltage.
So that could possibly be just one high-power 55V-nominal panel or maybe a string of 'only' three or four 12V nominals, which could even be a set of those favourite HF panels at a pinch, to start off.
Rgds
Damon