@guystewart , this is just an update on using the new v3.16 firmware from this post on the old Community (https://community.victronenergy.com/questions/311244/mppt-firmware-315-and-mandatory-updates.html#). I was going to reply directly to that post, but I could not seem to upload images on that site.
The updated firmware did not correct the problem I had with the two systems described in the previous post. I installed the new firmware on July 24th and my system hit absorption on that date. However, it did not hit absorption again for about another 10 days on August 2nd. Then it did not hit absorption again until August 11, when I reverted back to v3.13.
Now, some of the days I did not have the daylight to reach absorption charge, which is understandable. However, there were several days where my SOC peaked to ~99% and held without hitting absorption (e.g. July 29 - Aug 2).
Shown below are some graphs from the VRM for reference.
Let me know if you need any additional information for help with this. The image and description above is from my 12v system, but also my friend’s 48v system had the same issue. His system his absorption for one day, then did not hit absorption again until he reverted back to v3.14.
Thanks again for your help!