Look, hydrometer readings -verify- they are a state of charge polygraph. If you test cells and find them full and the controller or coverter is still in absorbsion...
BAD
If the controller or converter drops from absorbsion to float but a hydrometer reading says the batteries are not at full density
BAD
If batteries are presented a uniformly predictable charge regimen every day they are not going to do the Dr Jekyll Mr. Hyde routine. If the charging device can't walk and chew gum, stick behind a rear tire and back the vehicle up a foot or two. That is an effective fix-it tool for schizoid mechanisms.
Once a charging management device is dialed-in it should stay that way for months. Temperature and battery condition will affect the dial-in.
Most charge management devices do not allow to user to dial-in (tweak) charge protocols to suit the battery. The battery gets angry and has the last word.
