battery configuration

Think my battery charger is not working well. Only shows 2 amps when charging...SB battery is showing to be replace based on my battery tester...it is the one by itself, other bank is tied together in parallel. Don't understand the setup yet. I was trying to get a Pronautic 30AMP - 3 Bank, but...

There are so many posts and articles on battery configurations that now I'm more confused than ever. I have a 2014 Sundancer 280 and am looking to this group for advice on battery configuration. There are two batteries. I bought the boat recently and the current set up is a deep cycle on #2...

Good evening, Need some help - just replaced my batteries and put them back the way the owner before me did it...cranking/ starting batteries together on the starboard side and the house batteries together on the port side. The reason I think they should be 1 on each side is my port motor was...