Phantom loads are all that should be distracting charge amps. I'll check though. These batts are about 3 years old. Only a third of the time, or maybe half, used dry camping down to 50%...not even that much very often. The rest is plugged in or solar....all winter....except this winter I've monkeyed around dropping them to what I believed to be 50%...more than once. Don't check SG that often so while it would greatly surprise me, that 50% SOC could have been near zero....eeshhh. Also will re check Trimetric parameters. I noticed Crown said to limit dropping below 1.125SG???? I suppose I "limited" that but how do you drop below zero?