The Centerfielder requires dual Balmar MC-614 regulators to function. If you don't already have the MC-614s, at $350 per regulator plus the $200 for the Centerfielder, you're looking at a $900 bill just for parts.
Based upon what I've read and seen, a switchable ACR or combiner with a monitor will accomplish the same functions.
Incidentally, my alternators were rewired to preclude the charge having to run through the starter cables and 1-all-2-off switch to provide power from the alternator to the batts. Each alt is wired directly to its own battery bank. Separate batt switches provide the capability to manually combine battery banks if needed.