Not sure if what I am adding will help as my issue appears different but I do wonder if they may be some related factor with my issue.
I am running a single unit, Growatt 24V SPF 3000TL LVM, and I am also not running enough panels at the moment that I have the issue of losing solar energy, my issue still relates to the charging of the unit though. My settings are as follows ...
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Whenever the unit begins charging with the utility, it never reaches the bulk charge before it stops charging. Charging usually stops at around the 27V mark and I have yet to understand why it does. During the day I get about 1-2kw of solar but my bank is almost 11kw so I do use the utility to charge the remainder of the battery. My current load will use the 11kw in a day or 2.
My experience might be completely unrelated to the topic of this post but I am at a loss to understand how or why the Growatt behaves how it does for my system and my settings.