I am not concerned with spending money on something I need. I just want a system that is simple, good, and does what I want it to do. The AGM Lifeline batteries really did not live up to expectations. I am happy to use lithium but it gets more complicated. I am, and have been, maintaining the trailer. But not interested in doing it the rest of my life, whatever is left. Any suggestions for a reputable 6V AGM battery that isn't taller that 10 inches? I am happy to pay. And it isn't the money for maintenance, it is the lack of my know how. I do know my limitations.