In my research on batteries, controllers and solar, IHMO if you have a lot of money to spend the lithium is the way to go but bang for your buck AGM or sealed lead acid are what I will be changing to when my current batteries give up. I only had the OEM Harris batteries in use for a month before they failed, Thor did pay for the replacements which were deep cycle from NAPA which have worked great and will stay with them for now.
Coveman2
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