How far will the panels be from the controller?
My system the panels are 50 feet from the controller going to a 12v bank
the panels are 235W at 44V voc, they're wired parallel to the controller via 6 gauge, then 2 gauge to the combiner box that runs 1/0 gauge to the batteries.
The Vmp is 32V which gives me a happy window between the panel Vs Battery Voltage, so if possible hook up a panel as is to the battery and see what your Vmp will be.
Better the match the more efficient the controller will be, but we need to consider the wattage and length of wire run to figure out best array voltage as well.
4*270 = 1080W @ panel volts
1080/ 38.5V = 28.05A (That's a fair bit to push, So now how far from the panel to the controler and with what AWG size of wire do you plan to use?)