Just measured the slot that allows DC cables into the MPPT RS 450/200 terminals, and it will only allow .6" diameter cables. I have 2/0 cable that has a finished outer diameter of exactly .6" but the heat shrink is a bit more than that. I'd like to connect 4 x 2/0 cables (two positives, two negatives) to lessen my voltage drop and for the interest of safety.
I'm considering shaving a portion of the slot as needed to fit the 2/0 cables in. But it seems the MPPT RS slot is designed to limit the DC battery cable size purposefully. Is there a reason why bigger cables are not desired on this MPPT?