My Northstar when newer would eventually taper to 0.0 amps at any voltage, Now it is pretty rare that i see it take less than 0.2 amps at 14.7v but it is up in the 700 deep cycle range, many of those well below 50%.
My meanwell to battery wiring is a bit stretchy and stretchier depending on load. Dialing in 13.6v after 0.5% of capacity it reached, well sometimes i dial it a bit too low as I am unwilling to wait for it to turn back on as voltage naturally drops. Hours at 13.5v and then dialing upto 13.6v the amps will raise from 0.0 to 1.5 or so, and upto 14.7 goes back up to 2+ amps.
My Northstar defnintely wants 13.6v float, adjusted for battery temperature if more than 20 degrees away from 77f.
Lifeline's manual states 0.5% of capacity at absorption voltage. I seek this goal every recharge.
This tapering 0.5% or less is taking nearly twice as long as when the battery was new. I imgaine it would have gone cliff diving long ago if I did not adjust accordingly.
The tapering to 0.5% duration can be lessened after a deep discharge and a solid 40+ amps is fed to it until it hits absorption voltage and then is held until 0.5%, but this high amp blast restoring some performance is becoming less effective as cycles accumulate.
