AGM Mystery Capacity Crash Below 75% SOC UPDATE

A side note
I try to keep my batteries above 70%
At 50% I am not going to be running big inverter loads like MW or kettle or toaster

I'll run the generator or do without
Just because the standard is to not go below 50%
Doesn't mean doesn't mean go ahead and do 50% every camping night and do back to back heavy loads every them every morning

Even with my less intense loading and higher SOC, I charge them to full everyday
Unless there is something that prevents me from doing so