If you are running Trojan brand, high antimony 6v or 12V batteries, do a search on their website and read up on the specifications required. They need to be charged to 14.8V to get to 100%, not 14.4V like most charger controllers provide. Iota brand is the exception, it charges at 14.8V in bulk mode. Most of the others don not.
If your are going to equalize the batteries from time to time, the Trojans need 15.5V to do so. All of this to say that running true deep cycle batteries, your needs are different from the average camper running regular group 24 27 or 31 Deep Cycle batteries, where 14.4V is fine.
I would also run a capable 14.8V for Costco or Sams club based GC2 batteries.
