..."I have a 2 bank charger that has fused circuits for each bank. "
That's fine IF it is charging only two batteries. You can NOT charge two batteries with the same (one bank) charger and get away with it. One battery (the bully) will steal the charge from the other.
Jeff
Battery parasitic draw
Re: Battery parasitic draw
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington