750 feet is a nightmare.
Toss the Classic now.
Parallel should be done only when necessary.
You need to familiarize yourself with this tool:
This free voltage drop calculator estimates the voltage drop of an electrical circuit based on the wire size, distance, and anticipated load current.
www.calculator.net
24 * 395W = 9480W of power
9480W/48V= 198A of charge current
Voc 49.7V (rounding to 50).
Vmp 40.6V
Isc 10.29
Imp 9.73
Schnieder makes a spendy 80A, 600V SCC.
600V/50V = 12 panels in series. You need to leave some cold temperature margins, so you would fall back to 8 panels in series with 3 in parallel
For the voltage drop calculator, you look at Vmp and Isc as worst cases:
8S3P array produces 397.6V and 30.87A
Running 3 sets of 8awg from the array to THREE separate 80A/600V Schnieder controllers (about $1200 each), will produce a 2.44% voltage drop - pretty good.
If you could get away with 22 panels...
11S2P. You could probably get away with 2X SCC only losing a little of the array's performance at peak output.
547V, 20.58A - 1.77% voltage drop, and you're only running 2 sets of 8awg conductors rather than 3 and saving $1200 on a 3rd charge controller and $XX on two less panels.
Of course if you need the extra 800W, it won't work.
This is a dance of wire cost vs. equipment cost.
You could make it work with your Classic, but you'd have to run two pairs of 4/0 conductors 750 feet... That might be a bit expensive.