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Message: <blockquote data-quote="binky" data-source="post: 561180" data-attributes="member: 490"><p>2 weeks is certainly excessive, which may indicate one knackered battery in the set. It might be worth disconnecting the entire set, and checking the batteries individually, perhaps recharge them individually before replacing as a stack. I've had problems with Lithium batteries taking days to charge because they fell below 10%, which puts them into a trickle charge rate. That happened mid winter in similar conditions to what we are having now in sunny Devon. I'm not sure what the min level should be for AGM, but suspect it's around 20%.  Does your system have a BMS?</p></blockquote><p></p>