Without knowing layout size or what your running. You have available 8 amps on each line. I still might up the wiring size. 14 gauge buss and 16 or 18 for your feeders. My own layout is 12 gauge with 14 gauge feeders. But I have some long wire runs to some blocks.
An MTH Z1000 has a 14v auxiliary tap. You can buy just the power supply.